W741C201_技术文档

Preliminary W741C20X

4-BIT MICROCONTROLLER

Table of Contents--

GENERAL DESCRIPTION..............................................................................................................................2

FEATURES......................................................................................................................................................2

PIN CONFIGURATION....................................................................................................................................3

PIN DESCRIPTION..........................................................................................................................................4

BLOCK DIAGRAM...........................................................................................................................................5

FUNCTIONAL DESCRIPTION ........................................................................................................................6

ABSOLUTE MAXIMUM RATINGS ................................................................................................................27

DC CHARACTERISTICS...............................................................................................................................28

AC CHARACTERISTICS...............................................................................................................................29

PAD ASSIGNMENT & POSITIONS...............................................................................................................30

TYPICAL APPLICATION CIRCUIT................................................................................................................31

INSTRUCTION SET TABLE..........................................................................................................................32

PACKAGE DIMENSIONS..............................................................................................................................79

Publication Release Date: March 1998

- 1 -

Revision A3

Preliminary W741C20X

GENERAL DESCRIPTION

The W741C20X is a high-performance 4-bit microcontroller (µC) that operates on very low current.

The device contains a 4-bit ALU, two 8-bit timers, a divider, a serial port, and five 4-bit I/O ports

(including 3 output ports for LED driving). There are also seven interrupt sources and 8-level

subroutine nesting for interrupt applications. The W741C20X has two power reduction modes, hold

mode and stop mode, which help to minimize power dissipation.

The W741C20X is suitable for remote controllers, toy controllers, keyboard controllers, speech

synthesis LSI controllers, and other products.

FEATURES

• Operating voltage: 2.2V to 5.5V

• Crystal or RC oscillation circuit can be selected by the code option

− Crystal/Ceramic oscillator: up to 4 MHz

− RC oscillator: up to 4 MHz

• Both in crystal or RC oscillator operation mode, high-frequency (400 KHz to 4 MHz) or low-

frequency (32.768 KHz) oscillation must be determined by the code option

• Memory

− 2048 x 16 bit program ROM (including 2K x 4 bit look-up table)

− 128 x 4 bit data RAM (including 16 working registers)

• 21 input/output pins

− Input/output ports: 4 ports/16 pins

− Serial input/output port: 1 port /4 pins (high sink current for LED driving)

− MFP output pin: 1 pin (MFP)

• Power-down mode

− Hold function: no operation (except for oscillator)

− Stop function: no operation (including oscillator)

• Seven types of interrupts

− Five internal interrupts (Divider 0, Timer 0, Timer 1, and Serial I/O)

− Two external interrupts (Port RC and INT pin)

• MFP output pin

− Output is software selectable as modulating or nonmodulating frequency

− Works as frequency output specified by Timer 1

• Built-in 14-bit clock frequency divider circuit

• Two built-in 8-bit programmable countdown timers

− Timer 0: One of two internal clock frequencies (FOSC/4 or FOSC/1024) can be selected

− Timer 1: Offers auto-reload function, and one of two internal clock frequencies (FOSC or

FOSC/64) can be selected, or falling edge of pin RC.0 can be selected (output through MFP pin)

• Built-in 18/14-bit watchdog timer selectable for system reset

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Preliminary W741C20X

• Powerful instruction set: 118 instructions

• 8-level subroutine (include interrupt) nesting

• One serial transmission/receiver port specified by software

• Up to 1 µS instruction cycle (with 4 MHz operating frequency)

• Packaged in 18-pin, 20-pin, 28-pin PDIP and 20-pin, 28-pin SOP

PIN CONFIGURATION

W741C202/C205

28

27

26

25

24

23

22

21

20

19

18

17

16

15

1

RA1

RA0

XIN

RA2

RA3

INT

2

3

4

RES

XOUT

W741C201

5

DD

V

SS

V

18

6

1

2

3

4

5

6

7

8

9

RD3

RD2

RD1

RD0

RC3

RA1

RA0

XIN

RE0

RE1

RE2

RE3

RB0

RB1

RA2

RA3

17

16

15

14

13

12

11

10

7

8

INT

9

XOUT

RES

10

11

12

13

14

DD

V

SS

V

RC3

RC2

RC1

RC2

RC1

RC0

MFP

RB0

RB1

RB2

RB3

RB2

RB3

NC

RC0

18-PDIP(300 mil)

28 SKINNY(300 mil), 28 SOP

W741C204

W741C203

20

19

18

17

16

15

14

13

12

11

1

20

19

18

17

16

15

14

13

12

11

RA1

RA0

XIN

1

RA2

RA3

INT

RA1

RA0

XIN

RA2

RA3

INT

2

3

4

XOUT

RES

XOUT

5

SS

V

DD

V

SS

V

DD

V

6

SS

V

DD

V

SS

V

DD

V

7

RC3

RC2

RC1

RC0

RB0

RB1

RB2

RB3

RB0

RB1

RB2

RB3

RC3

RC2

RC1

RC0

8

9

10

20-PDIP(300 mil)

20 SOP

Publication Release Date: March 1998

Revision A3

- 3 -

Preliminary W741C20X

PIN DESCRIPTION

SYMBOL

XIN

I/O

FUNCTION

I

Input pin for oscillator.

Connected to crystal or resistor to generate system clock by code option.

XOUT

O

Output pin for oscillator.

Connected to crystal or resistor to generate system clock by code option.

I/O

Input/Output port. Input/output mode specified by port mode 1 register

(PM1). When used as output port, can provide high sink current for

driving LED.

RA0−RA3

I/O

Input/Output port. Input/output mode specified by port mode 2 register

(PM2). When used as output port, can provide high sink current for

driving LED.

RB0−RB3

I/O

Input/Output port. Input/output mode specified by port mode 4 register

(PM4). Each pin has an independent interrupt capability in input mode.

RC0−RC3

RD0−RD3

Input/Output port. Input/output mode specified by port mode 5 register

(PM5).

RE0/DOUT

RE1/CLKO

RE2/DIN

Special input/output port.

This port can be configured by software to act as the output of internal

port RT or the serial I/O port. When used as output port, can provide high

sink current for driving LED.

RE3/CLKI

MFP

O

Output pin only.

This pin can output modulating or nonmodulating frequency, or Timer 1

clock output specified by mode register 1 (MR1).

I

External interrupt pin with pull-high resistor.

INT

System reset pin with pull-high resistor.

Positive power supply (+).

RES

VDD

VSS

Negative power supply (-).

- 4 -

Preliminary W741C20X

BLOCK DIAGRAM

RAM

(128*4)

RA0 to 3

PORT RA

ACC

ALU

ROM

(2048*16)

(look_up table

RB0 to 3

PORT RB

2K*4)

RC0 to 3

+1(+2)

PORT RC

PC

Central Control

Unit

RD0 to 3

PORT RD

IEF

HEF PEF

EVF SEF

HCF

STACK

(8 Levels)

PORT RT

PSR0 PSR1 PSR2

MR0 PM0

PR

SEL

RE0 to 3

.

. .

(RE0/DOUT,

RE1/CLKO,

RE2/DIN,

MUX

Serial I/O

RE3/CLKI)

Modulation

Frequency

Pulse

SEL

Timer 0

(8-bit)

Timer 1

(8-bit)

MFP

MUX

VDD

VSS

INT

Divider 0

(14-bit)

Watchdog Timer

(4-bit)

Timing Generator

RES

XIN XOUT

Publication Release Date: March 1998

Revision A3

- 5 -

Preliminary W741C20X

FUNCTIONAL DESCRIPTION

Program Counter (PC)

Organized as an 11-bit binary counter (PC0 to PC10), the program counter generates the addresses

of the 2048 × 16 on-chip ROM containing the program instruction words. When jump or subroutine

call instructions or interrupt, or initial reset conditions are to be executed, the address corresponding

to the instruction will be loaded into the program counter. The format used is shown below.

ITEM

Initial Reset

ADDRESS

INTERRUPT

PRIORITY

000H

004H

008H

00CH

014H

-

INT 0 (Divider)

INT 1 (Timer 0)

INT 2 (Port RC)

1st

2nd

3rd

4th

INT 3 (

pin)

INT

INT 4 (Serial Port Input)

INT 5 (Serial Port Output)

INT 6 (Timer 1)

018H

01CH

020H

XXXH

5th

6th

7th

-

JMP Instruction

Subroutine Call

-

Stack Register (STACK)

The stack register is organized as 11 bits x 8 levels (first-in, last-out). When either a call subroutine or

an interrupt is executed, the program counter will be pushed onto the stack register automatically. At

the end of a call subroutine or an interrupt service subroutine, the RTN instruction must be executed

to pop the contents of the stack register into the program counter. When the stack register is pushed

over the eighth level, the contents of the first level will be lost. In other words, the stack register is

always eight levels deep.

Program Memory (ROM)

The read-only memory (ROM) is used to store program codes; the look-up table is arranged as 2048

× 4 bits. The first three quarters of ROM (000H to 5FFH) are used to store instruction codes only, but

the last quarter (600H to 7FFH) can store both instruction codes and the look-up table. Each look-up

table element is composed of 4 bits, so the look-up table can be addressed up to 2048 elements.

Instruction MOVC R is used to read the look-up table and transfer table data to the RAM. The

organization of the program memory is shown in Figure 1.

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Preliminary W741C20X

16 bits

000H

TABH

TABL

ACC

- x x x x x x x x x y y

2048

address

Offset

0 1 1 x x x x x x x x x

ROM address = 600H + Offset/4

600H

7FFH

This area can be used to store both instruction code

and look-up table

3

2

1

0

Each element (4 bits) of the look-up table

2048 x 16-bit

Figure 1. Program Memory Organization

Data Memory (RAM)

1. Architecture

The static data memory (RAM) used to store data is arranged as 128 × 4 bits. The data memory can

be addressed directly or indirectly. The organization of the data memory is shown in Figure 2.

4 bits

00H

:

Working Register

0FH

128

address

7FH

128 x 4-bit

Figure 2. Data Memory Organization

Publication Release Date: March 1998

Revision A3

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Preliminary W741C20X

The first sixteen addresses (00H to 0FH) in the data memory are known as the working registers

(WR). The other data memory is used as general memory and cannot operate directly with immediate

data. The relationship between data memory locations and the page register (PAGE) in indirect

addressing mode is described in the next section.

2. Page Register (PAGE)

The page register is organized as a 4-bit binary register. The bit descriptions are as follows:

3

2

1

0

PAGE

R/W

Note: R/W means read/write available.

Bit 3 is reserved.

Bit 2, Bit 1, Bit 0 Indirect addressing mode preselect bits:

000 = Page 0 (00H - 0FH)

001 = Page 1 (10H - 1FH)

010 = Page 2 (20H - 2FH)

011 = Page 3 (30H - 3FH)

100 = Page 4 (40H - 4FH)

101 = Page 5 (50H - 5FH)

110 = Page 6 (60H - 6FH)

111 = Page 7 (70H - 7FH)

Accumulator (ACC)

The accumulator (ACC) is a 4-bit register used to hold results from the ALU and transfer data

between the memory, I/O ports, and registers.

Arithmetic and Logic Unit (ALU)

This is a circuit which performs arithmetic and logic operations. The ALU provides the following

functions:

• Logic operations: ANL, XRL, ORL

• Branch decisions: JB0, JB1, JB2, JB3, JNZ, JZ, JC, JNC, DSKZ, DSKNZ, SKB0, SKB1, SKB2,

SKB3

• Shift operations: SHRC, RRC, SHLC, RLC

• Binary additions/subtractions: ADC, SBC, ADD, SUB, ADU, DEC, INC

After any of the above instructions are executed, the status of the carry flag (CF) and zero flag (ZF) is

stored in the internal registers. CF can be read out by executing MOVA R, CF.

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Preliminary W741C20X

Clock Generator

The W741C20X provides a crystal or RC oscillation circuit selected by option codes to generate the

system clock through external connections. If a crystal oscillator is used, a crystal or a ceramic

resonator must be connected to XIN and XOUT, and the capacitor must be connected if an accurate

frequency is needed. When a crystal oscillator is used, a high-frequency clock (400 KHz to 4 MHz) or

low-frequency clock (32 KHz) can be selected for the system clock by means of option codes. If the

RC oscillator is used, a resistor in the range of 20 KΩ to 1.6 MΩ must be connected to XIN and

XOUT, as shown in Figure 3. The system clock frequency range is from 32 KHz to 4 MHz. One

machine cycle consists of a four-phase system clock sequence and can run up to 1 µS with a 4 MHz

system clock.

XIN

or

Resistor

Crystal

32 KHz or

XOUT

400K to 4MHz

XOUT

Figure 3. Oscillator Configuration

Divider 0

Divider 0 is organized as a 14-bit binary up-counter designed to generate periodic interrupts, as

shown in Figure 4. When the system starts, the divider is incremented by each system clock (FOSC).

When an overflow occurs, the divider event flag is set to 1 (EVF.0 = 1). Then, if the divider interrupt

enable flag has been set (IEF.0 = 1), the interrupt is executed, while if the hold release enable flag

has been set (HEF.0 = 1), the hold state is terminated. The last 4-stage of the Divider 0 can be reset

by executing CLR DIVR0 instruction. If the oscillator is connected to the 32768 Hz crystal, the EVF.0

will be set to 1 periodically at each 500 mS interval.

Watchdog Timer (WDT)

The watchdog timer (WDT) is organized as a 4-bit up counter and is designed to protect the program

from unknown errors. The WDT is enable when the corresponding option code bit of the WDT is set

to 1. If the WDT overflows, the chip will be reset. At initial reset, the input clock of the WDT is

FOSC/1024. The input clock of the WDT can be switched to FOSC/16384 (or FOSC/1024) by executing

the SET PMF, #08H (or CLR PMF, #08H) instruction. The contents of the WDT can be reset by the

instruction CLR WDT. In normal operation, the application program must reset WDT before it

overflows. A WDT overflow indicates that the operation is not under control and the chip will be reset.

The WDT minimun overflow period is 468.75 mS when the system clock (FOSC) is 32 KHz and WDT

clock input is FOSC/1024. When the corresponding option code bit of the WDT is set to 0, the WDT

function is disabled. The organization of the Divider0 and watchdog timer is shown in Figure 4.

Publication Release Date: March 1998

- 9 -

Revision A3

Preliminary W741C20X

Divider0

..._Q9

HEF.0

Fosc

Hold mode release (HCF.0)

Divider0 interrupt (INT0)

EVF.0

S

R

Q14

R

Q1 Q2

Q10 Q11 Q12 Q13

R

IEF.0

Q

R

1. Reset

2. CLR EVF, #01H

3. CLR DIVR0

WDT

PMF.3

Fosc/16384

Fosc/1024

Overflow signal

Qw4

R

Qw1 Qw2 Qw3

R

System Reset

R

Enable

/Disable

Mask Option

1. Reset

2. CLR WDT

Figure 4. Organization of Divider and Watchdog Timer

Parameter Flag (PMF)

The parameter flag is organized as a 4-bit binary register (PMF.0 to PMF.3). The PMF is controlled

by the SET PMF, #I or CLR PMF, #I instruction. The bit descriptions are as follows:

3

2

1

0

PMF

W

Note: W means write only.

Bit 0, Bit 1 & Bit 2 are reserved.

Bit 3 = 0 The fundamental frequency of the watch dog timer is FOSC/1024.

= 1 The fundamental frequency of the watch dog timer is FOSC/16384.

At initial reset, bit 3 of PMF is set to "0".

- 10 -

Preliminary W741C20X

Timer/Counter

Timer 0 (TM0)

Timer 0 (TM0) is a programmable 8-bit binary down-counter. The specified value can be loaded into

TM0 by executing the MOV TM0L (TM0H), R or MOV TM0, #I instruction. When the MOV TM0L

(TM0H), R instructions are executed, the TM0 will stop down-counting (if the TM0 is down-counting),

the MR0.3 will be reset to 0, and the specified value is loaded into TM0. If MR0.3 is set to 1, the

event flag 1 (EVF.1) is reset and the TM0 starts to count. When it decrements to FFH, Timer 0 stops

operating and generates an underflow (EVF.1 = 1). The interrupt is executed if the Timer 0 interrupt

enable flag has been set (IEF.1 = 1); and the hold state is terminated if the hold release enable flag 1

has been set (HEF.1 = 1). The Timer 0 clock input can be set as FOSC/1024 or FOSC/4 by setting

MR0.0 to 1 or by resetting MR0.0 to 0. The default timer value is FOSC/4. The organization of Timer 0

is shown in Figure 5.

If the Timer 0 clock input is FOSC/4, then:

Desired time 0 interval = (preset value +1) × 4 × 1/FOSC

If the Timer 0 clock input is FOSC/1024, then:

Desired time 0 interval = (preset value +1) × 1024 × 1/FOSC

Preset value: Decimal number of Timer 0 preset value

FOSC: Clock oscillation frequency

1. Reset

2. CLR EVF, #02H

3. Reset MR0.3 to 0

4. MOV TM0L, R or MOV TM0H, R

Disable

Enable

MR0.0

HEF.1

IEF.1

Fosc/1024

Fosc/4

8-bit Binary

Down Counter

(Timer 0)

Hold mode release (HCF.1)

Timer 0 interrupt (INT1)

S

R

Q

EVF.1

4

1. Set MR0.3 to 1

2. MOV TM0, #I

8

1. Reset

2. CLR EVF, #02H

3. Set MR0.3 to 1

4. MOV TM0, #I

MOV TM0H, R

MOV TM0L, R

MOV TM0, #I

Figure 5. Organization of Timer 0

Publication Release Date: March 1998

Revision A3

- 11 -

Preliminary W741C20X

Timer 1 (TM1)

Timer 1 (TM1) is also a programmable 8-bit binary down counter, as shown in Figure 6. Timer 1 can

be used as a counter to count external events or to output an arbitrary frequency to the MFP pin. The

input clock of Timer 1 can be one of three sources: Fosc/64, Fosc, or an external clock from the RC.0

input pin. The source can be selected by setting bit 0 and bit 1 of mode register 1 (MR1). At initial

reset, the Timer 1 clock input is Fosc. If an external clock is selected as the clock source of Timer 1,

the content of Timer 1 is decreased by 1 at the falling edge of RC.0. When the MOV TM1L, R or

MOV TM1H,R instruction is executed, the specified data are loaded into the auto-reload buffer and

the TM1 down-counting will be disabled (i.e. MR1.3 is reset to 0). If the bit 3 of MR1 is set (MR1.3 =

1), the contents of the auto-reload buffer will be loaded into the TM1 down counter, Timer 1 starts to

down count, and the event flag 7 is reset (EVF.7 = 0). When the MOV TM1, #I instruction is executed,

the event flag 7 (EVF.7) and MR1.3 are reset and the specified value is loaded into auto-reload buffer

and TM1 by the internal hardware, then the MR1.3 is set, that is the TM1 starts to count by the

hardware. When the timer decrements to FFH, it will generate an underflow (EVF.7 = 1) and be

auto-reloaded with the specified data, after which it will continue to count down. An interrupt is

executed if the interrupt enable flag 7 has been set to 1 (IEF.7 = 1), and the hold state is terminated if

the hold mode release enable flag 7 is set to 1 (HEF.7 = 1). The specified frequency of Timer 1 can

be delivered to the MFP output pin by programming bit 2 of MR1. Bit 3 of MR1 can be used to make

Timer 1 stop or start counting.

If the Timer 1 clock input is FT, then:

Desired Timer 1 interval = (preset value +1) / FT

Desired frequency for MFP output pin = FT ÷ (preset value + 1) ÷ 2 (Hz)

Preset value: Decimal number of Timer 1 preset value, and

FOSC: Clock oscillation frequency

MOV TM1, #I

MOV TM1L, R

MOV TM1H, R

8

Underflow

signal

1. MR1.3 = 1

2. MOV TM1, #I

S

R

Q

EVF.7

4

1. Reset

2. INT 7 accept

3. CLR EVF, #80H

4. Set MR1.3 to 1

Auto-reload buffer

8 bits

MR1.1

External clock

via RC.0

Enable

Disable

5. MOV TM1, #I

F_T

8-bit Binary

Down Counter

(Timer 1)

Fosc/64

Fosc

2

circuit

MFP

output pin

Reset

Set MR1.3 to 1

MOV TM1, #I

Reset

MR1.0

MR1.2

MFP signal

1. MR1.3 = 0

Figure 6. Organization of Timer 1

- 12 -

Preliminary W741C20X

For example, when FT equals 32768 Hz, depending on the preset value of TM1, the MFP pin will

output a single tone signal in the tone frequency range from 64 Hz to 16384 Hz. The relation between

the tone frequency and the preset value of TM1 is shown in the table below.

3rd octave

4th octave

5th octave

Tone

frequency

TM1 preset value &

MFP frequency

131.07

Tone

frequency

TM1 preset value &

MFP frequency

260.06

Tone

frequency

TM1 preset value &

MFP frequency

1EH

C

130.81

138.59

146.83

155.56

164.81

174.61

185.00

196.00

207.65

220.00

233.08

246.94

7CH

75H

6FH

68H

62H

5DH

58H

53H

4EH

49H

45H

41H

261.63

277.18

293.66

311.13

329.63

349.23

369.99

392.00

415.30

440.00

466.16

493.88

3EH

3AH

37H

34H

31H

2EH

2BH

29H

26H

24H

22H

20H

523.25

554.37

587.33

622.25

659.26

698.46

739.99

783.99

830.61

880.00

932.23

987.77

528.51

564.96

585.14

630.15

655.36

712.34

744.72

780.19

819.20

862.84

910.22

963.76

C#

D

138.84

146.28

156.03

165.49

174.30

184.09

195.04

207.39

221.40

234.05

248.24

277.69

292.57

309.13

327.68

372.36

390.09

420.10

443.81

442.81

468.11

496.48

1CH

1BH

19H

18H

16H

15H

14H

13H

12H

11H

10H

T

O

N

E

D#

E

F

F#

G

G#

A

A#

B

Note: Central tone is A4 (440 Hz).

Mode Register 0 (MR0)

Mode Register 0 is organized as a 4-bit binary register (MR0.0 to MR0.3). MR0 can be used to control

the operation of Timer 0. The bit descriptions are as follows:

3

2

1

0

MR0

W

Note: W means write only.

Bit 0 = 0 The fundamental frequency of Timer 0 is FOSC/4.

= 1 The fundamental frequency of Timer 0 is FOSC/1024.

Bit 1 & Bit 2 are reserved

Bit 3 = 0 Timer 0 stops down-counting.

= 1 Timer 0 starts down-counting.

Publication Release Date: March 1998

Revision A3

- 13 -

Preliminary W741C20X

Mode Register 1 (MR1)

Mode Register 1 is organized as a 4-bit binary register (MR1.0 to MR1.3). MR1 can be used to control

the operation of Timer 1. The bit descriptions are as follows:

3

2

1

0

MR1

W

Note: W means write only.

Bit 0 = 0 The internal fundamental frequency of Timer 1 is FOSC.

= 1 The internal fundamental frequency of Timer 1 is FOSC/64.

Bit 1 = 0 The fundamental frequency source of Timer 1 is the internal clock.

= 1 The fundamental frequency source of Timer 1 is the external clock from RC.0 input pin.

Bit 2 = 0 The specified waveform of the MFP generator is delivered at the MFP output pin.

= 1 The specified frequency of Timer 1 is delivered at the MFP output pin.

Bit 3 = 0 Timer 1 stops down-counting.

= 1 Timer 1 starts down-counting.

Input/Output Ports RA, RB

Port RA consists of pins RA.0 to RA.3 and Port RB consists of pins RB.0 to RB.3. At initial reset,

input/output ports RA and RB are both in input mode. When RA and RB are used as output ports,

CMOS or NMOS open drain output type can be selected by the PM0 register. Each pin of port RA or

RB can be specified as input or output mode independently by the PM1 and PM2 registers. The

MOVA R, RA or MOVA R, RB instructions operate the input functions and the MOV RA, R or MOV

RB, R operate the output functions. For more details, refer to the instruction table and Figure 7.

Input/Output Pin of the RA(RB)

VDD

PM0.0 (or PM0.1)

Output

Buffer

I/O PIN

RA.n(RB.n)

Enable

DATA

BUS

PM1.n

(or PM2.n)

MOV RA, R

(or MOV RB, R)

Instruction

Enable

MOVA R, RA

(or MOVA R, RB)

instruction

Figure 7. Architecture of RA & RB Input/Output Pins

- 14 -

Preliminary W741C20X

Port Mode 0 Register (PM0)

The port mode 0 register is organized as 4-bit binary register (PM0.0 to PM0.3). PM0 can be used to

determine the structure of the input/output ports; it is controlled by the MOV PM0, #I instruction. The

bit descriptions are as follows:

3

2

1

0

PM0

w

Note: W means write only.

Bit 0 = 0 RA port is CMOS output type. Bit 0 = 1 RA port is NMOS open drain output type.

Bit 1 = 0 RB port is CMOS output type. Bit 0 = 1 RB port is NMOS open drain output type.

Bit 2 & Bit 3 are reserved.

Port Mode 1 Register (PM1)

The port mode 1 register is organized as 4-bit binary register (PM1.0 to PM1.3). PM1 can be used to

control the input/output mode of port RA. PM1 is controlled by the MOV PM1, #I instruction. The bit

descriptions are as follows:

3

2

1

0

PM1

w

Note: W means write only.

Bit 0 = 0 RA.0 works as output pin; Bit 0 = 1 RA.0 works as input pin

Bit 1 = 0 RA.1 works as output pin; Bit 1 = 1 RA.1 works as input pin

Bit 2 = 0 RA.2 works as output pin; Bit 2 = 1 RA.2 works as input pin

Bit 3 = 0 RA.3 works as output pin; Bit 3 = 1 RA.3 works as input pin

At initial reset, port RA is input mode (PM1 = 1111B).

Port Mode 2 Register (PM2)

The port mode 2 register is organized as 4-bit binary register (PM2.0 to PM2.3). PM2 can be used to

control the input/output mode of port RB. PM2 is controlled by the MOV PM2, #I instruction. The bit

descriptions are as follows:

3

2

1

0

PM2

w

Note: W means write only.

Publication Release Date: March 1998

Revision A3

- 15 -

Preliminary W741C20X

Bit 0 = 0 RB.0 works as output pin; Bit 0 = 1 RB.0 works as input pin

Bit 1 = 0 RB.1 works as output pin; Bit 1 = 1 RB.1 works as input pin

Bit 2 = 0 RB.2 works as output pin; Bit 2 = 1 RB.2 works as input pin

Bit 3 = 0 RB.3 works as output pin; Bit 3 = 1 RB.3 works as input pin

At initial reset, the port RB is input mode (PM2 = 1111B).

Port Mode 3 register (PM3)

Port Mode 3 Register is organized as a 4-bit binary register (PM3.0 to PM3.3). PM3 can be used to

determine the operating mode of the output port RE and the clock rate of the serial I/O function. The

PM3 control diagram is shown in Figure 8. The bit descriptions are as follows:

3

2

1

0

PM3

W

Note: W means write only.

Bit 0 is reserved.

Bit 1 = 0 The output of the port RE is the output of the internal parallel port RT.

= 1 The port RE works as the serial input/output port.

Bit 2 is reserved.

Bit 3 = 0 Serial Tx rate = FOSC/2

= 1 Serial Tx rate = FOSC/256

Internal parallel port RT

MUX.

Port RE

Fosc/256

Fosc/2

Serial I/O port

PM3.3

PM3.1

Figure 8. PM3 Control Diagram

- 16 -

Preliminary W741C20X

Port Mode 4 Register (PM4)

The port mode 4 register is organized as 4-bit binary register (PM4.0 to PM4.3). PM4 can be used to

control the input/output mode of port RC. PM4 is controlled by the MOV PM4, #I instruction. The bit

descriptions are as follows:

3

2

1

0

PM4

w

Note: W means write only.

Bit 0 = 0 RC.0 works as output pin; Bit 0 = 1 RC.0 works as input pin

Bit 1 = 0 RC.1 works as output pin; Bit 1 = 1 RC.1 works as input pin

Bit 2 = 0 RC.2 works as output pin; Bit 2 = 1 RC.2 works as input pin

Bit 3 = 0 RC.3 works as output pin; Bit 3 = 1 RC.3 works as input pin

At initial reset, port RC is input mode (PM4 = 1111B).

Port Mode 5 Register (PM5)

The port mode 5 register is organized as 4-bit binary register (PM5.0 to PM5.3). PM5 can be used to

control the input/output mode of port RD. PM5 is controlled by the MOV PM5, #I instruction. The bit

descriptions are as follows:

3

2

1

0

PM5

w

Note: W means write only.

Bit 0 = 0 RD.0 works as output pin; Bit 0 = 1 RD.0 works as input pin

Bit 1 = 0 RD.1 works as output pin; Bit 1 = 1 RD.1 works as input pin

Bit 2 = 0 RD.2 works as output pin; Bit 2 = 1 RD.2 works as input pin

Bit 3 = 0 RD.3 works as output pin; Bit 3 = 1 RD.3 works as input pin

At initial reset, the port RB is input mode (PM2 = 1111B).

Input/Output Ports RC, RD

Port RC consists of pins RC.0 to RC.3, and port RD consists of pins RD.0 to RD.3. At initial reset,

input/output ports RC and RD are both in input mode. When RC and RD are used as output ports, the

CMOS type is the only ouput driving type. Each pin of port RC or RD can be specified as input or

output mode independently by the PM4 and PM5 registers. The MOVA R, RC or MOVA R, RD

instructions operate the input functions and the MOV RC, R or MOV RD, R operate the output

functions. When the PEF, HEF, and IEF corresponding to the RC port are set, a signal change at the

specified pins of port RC will execute the hold mode release or interrupt subroutine. Port status

register 0 (PSR0) records the status of port RC, and that can be read out and cleared by the MOV R,

PSR0, and CLR PSR0 instructions. Before the port mode of the RC port is changed from output

mode to input mode in the hold mode release and interrupt application, the output value must be

preset to the same as the system status to prevent the undesired signal change being accepted.

Publication Release Date: March 1998

- 17 -

Revision A3

Preliminary W741C20X

When the interrupt of RC port is accepted, the corresponding event flag (EVF.2) will be reset, but the

content of PSR0 should not be changed except the CLR PSR0 or MOV PEF, #I instruction being

executed or performing the reset function. In addition, the falling edge signal on the pin of port RC

specified by the instruction MOV SEF, #I will cause the device to exit the stop mode. The RD port is

used as the I/O port only. Refer to Figure 9, Figure 10 and the instruction table for more details.

Input/Output Pin of the RC(RD)

Vdd

Output

Buffer

I/O PIN

RC.n(RD.n)

Enable

DATA

BUS

PM4.n

(or PM5.n)

MOV RC, R

(or MOV RD, R)

Instruction

Enable

MOVA R, RC

(or MOVA R, RD)

instruction

Figure 9. Architecture of RC & RD Input/Output Pins

Port Enable Flag (PEF)

The port enable flag is organized as 4-bit binary register (PEF.0 to PEF.3). Before port RC may be

used to release the hold mode or preform interrupt function, the content of the PEF must be set first.

The PEF is controlled by the MOV PEF, #I instruction. The bit descriptions are as follows:

3

2

1

0

PEF

w

Note: W means write only.

PEF.0: Enable/disable the signal change at pin RC.0 to release hold mode or perform interrupt.

PEF.1: Enable/disable the signal change at pin RC.1 to release hold mode or perform interrupt.

PEF.2: Enable/disable the signal change at pin RC.2 to release hold mode or perform interrupt.

PEF.3: Enable/disable the signal change at pin RC.3 to release hold mode or perform interrupt.

Port Status Register 0 (PSR0)

Port status register 0 is organized as 4-bit binary register (PSR0.0 to PSR0.3). PSR0 can be read or

cleared by the MOVA R, PSR0, and CLR PSR0 instructions. The bit descriptions are as follows:

3

2

1

0

PSR0

R

Note: R means read only.

- 18 -

Preliminary W741C20X

Bit 0 = 1 Signal change at RC.0

Bit 1 = 1 Signal change at RC.1

Bit 2 = 1 Signal change at RC.2

Bit 3 = 1 Signal change at RC.3

DATA BUS

PM4.0

PEF.0

RC.0

PSR0.0

D

Q

Signal

change

detector

ck

R

PM4.1

PEF.1

HEF.2

EVF.2

RC.1

D

Q

HCF.2

INT 2

PSR0.1

PSR0.2

PSR0.3

D

Q

ck

Signal

change

detector

R

ck

R

IEF.2

PM4.2

PEF.2

RC.2

D

ck

Signal

change

detector

CLR EVF, #I

Reset

PM4.3

PEF.3

RC.3

D

Signal

change

detector

ck

MOVA R, RC

Reset

MOV PEF, #I

CLR PSR0

SEF.0

Falling

edge

detector

PM4.0

SEF.1

PM4.1

SEF.2

PM4.2

SEF.3

PM4.3

Falling

edge

detector

Wake up from STOP mode

Falling

edge

detector

Falling

edge

detector

Figure 10. Input Architecture of Ports RC

Output Port RE

Output port RE can be used as an output of the internal RT port, or as a serial input/output port. The

control flow is shown in Figure 8. When bit 1 of port mode 3 register (PM3) equals to 0, port RE works

as an output of internal port RT. When the MOV RE, R instruction is executed, the data in the RAM

will be output to port RT through port RE. When RE works as a parallel output port, it provides a high

sink current to drive LEDs. When bit 1 of PM3 equals to 1, the RE port works as a serial input/output

port, and RE.0 to RE.3 are used as DOUT, CLKO, DIN, and CLKI, respectively. In this case, the DIN

pin will has a built-in pull-high resistor. The serial I/O functions are controlled by the instructions SOP

R and SIP R. The functions of the two instructions are described below:

Publication Release Date: March 1998

- 19 -

Revision A3

Preliminary W741C20X

(1)When the SIP R instruction is executed, the data will be loaded from the serial input buffer to

the ACC and RAM first, and bit 1 of port status register 2 will automatically be set to "1" (BUSYI

= 1). Then the CLKI pin will send out 8 clocks and the data from the DIN pin will be loaded to

SIB at the rising edge of the CLKI pin. After the 8 clocks have been sent, BUSYI will be reset to

"0" and EVF.5 will be set to "1." At this time, if IEF.5 has been set (IEF.5 = 1), an interrupt is

executed; if HEF.5 has been set (HEF.5 = 1), the hold state is terminated. Users can check the

status of PSR2.1 (BUSYI) to know whether the serial input process is completed or not. If a

serial input process is not completed, and the SIP R instruction is executed again, the data will

be lost. The timing is shown in Figure 11.

T1

T2

T3

T4

Ins.

SIP R

CLKI

(RE3)

4

1

2

3

5

6

7

8

Data latch

BUSYI

(PSR2.1)

EVF5

DIN

(RE2)

Notes : 1. These clocks at the CLKI pin are internal clock and its frequency is Fosc/2

2. When the internal signal of the data latch equals to "1,"

then the data in SIB will be loaded into RAM and ACC.

Figure 11. Timing of the Serial Input Function (SIP R)

(2)When the SOP R instruction is executed, the data will be loaded to the serial output buffer

(SOB) and bit 3 of port status register 2 will be set to "1" (BUSYO = 1). Then the CLKO pin will

send out 8 clocks and the data in SOB will be sent out at the falling edge of the CLKO pin.

After the 8 clocks have been sent, BUSYO will be reset to "0" and EVF.6 will be set to "1." At

this time, if IEF.6 has been set (IEF.6 = 1), an interrupt is executed; if HEF.6 has been set

(HEF.6 = 1), the hold state is terminated. Users can check the status of PSR2.3 (BUSYO) to

know whether the serial output process is completed or not. If a serial output process is not

completed, and the SOP R instruction is executed again, the data will be lost. The timing is

shown in Figure 12.

- 20 -

Preliminary W741C20X

T1

T2

T3

T4

Ins.

SOP R

CLKO

(RE1)

4

1

2

3

5

6

7

8

Data

latch

BUSYO

(PSR2.3)

EVF6

DOUT

(RE0)

Notes : 1. These clocks at the CLKO pin are internal clock and its frequency is Fosc/2.

2. When the internal signal of the data latch equals to "1,"

then the data of the RAM and ACC be loaded to SOB.

Figure 12. Timing of the Serial Output Function (SOP R)

In the above description, the low nibble location of the serial input/output register is contributed to the

ACC, and the high nibble is to R. The port status register 2 (PSR2) including BUSYI, and BUSYO can

be read out or cleared by the MOVA R, PSR2, or CLR PSR2 instruction.

Port Status Register 2 (PSR2)

Port status register 2 is organized as 4-bit binary register (PSR2.0 to PSR2.3). PSR2 is controlled by

the MOVA R, PSR2, and CLR PSR2 instructions. The bit descriptions are as follows:

3

2

1

0

R

PSR2

R

Note: R means read only.

Bit 0 is reserved.

Bit 1 (BUSYI): Serial port input busy flag.

Bit 2 is reserved.

Bit 3 (BUSYO): Serial port output busy flag.

Publication Release Date: March 1998

Revision A3

- 21 -

Preliminary W741C20X

MFP Output Pin (MFP)

The MFP output pin can output the Timer 1 clock or the modulation frequency; the output of the pin is

determined by mode register 1 (MR1). The organization of MR1 is shown in Figure 6. When bit 2 of

MR1 is reset to "0," the MFP output can deliver a modulation output in any combination of one signal

from among DC, 4096Hz, 2048Hz, and one or more signals from among 128 Hz, 64 Hz, 8 Hz, 4 Hz, 2

Hz, or 1 Hz (when using a 32.768 KHz crystal). The MOV MFP, #I instruction is used to specify the

modulation output combination. The data specified by the 8-bit operand and the MFP output pin are

shown as below.

(FOSC = 32.768 KHz)

R7 R6

R5

0

1

0

1

0

1

0

1

R4

0

1

0

1

0

1

0

1

0

R3

0

1

0

1

0

1

0

1

0

R2

0

1

0

1

0

1

0

1

0

R1

0

1

0

1

0

1

0

1

0

R0

0

1

0

1

0

1

0

1

0

FUNCTION

Low level

128 Hz

64 Hz

0 0

8 Hz

4 Hz

2 Hz

1 Hz

High level

128 Hz

64 Hz

0 1

1 0

1 1

8 Hz

4 Hz

2 Hz

1 Hz

2048 Hz

2048 Hz * 128 Hz

2048 Hz * 64 Hz

2048 Hz * 8 Hz

2048 Hz * 4 Hz

2048 Hz * 2 Hz

2048 Hz * 1 Hz

4096 Hz

4096 Hz * 128 Hz

4096 Hz * 64 Hz

4096 Hz * 8 Hz

4096 Hz * 4 Hz

4096 Hz * 2 Hz

4096 Hz * 1 Hz

- 22 -

Preliminary W741C20X

Interrupts

The W741C20X provides five internal interrupt sources (Divider 0, Timer 0, Timer 1, serial I/O) and

two external interrupt sources (INT, port RC). Vector addresses for each of the interrupts are located

in the range of program memory (ROM) addresses 004H to 020H. The flags IEF, PEF, and EVF are

used to control the interrupts. When EVF is set to "1" by hardware and the corresponding bits of IEF

and PEF have been set by software, an interrupt is generated. When an interrupt occurs, all of the

interrupts are inhibited until the EN INT or MOV IEF, #I instruction is invoked. The interrupts can also

be disabled by executing the DIS INT instruction. When an interrupt is generated in hold mode, the

hold mode will be released momentarily and interrupt subroutine will be executed. After the RTN

instruction is executed in an interrupt subroutine, the µC will enter hold mode again. The operation

flow chart is shown in Figure 14. The control diagram is shown below.

Initial Reset

EN INT

Enable

MOV IEF,#I

Divider 0

EVF.0

overflow signal

S

Q

IEF.0

IEF.1

R

Timer 0

underflow signal

EVF.1

S

Q

Interrupt

Process

Circuit

Interrupt

Vector

004H

008H

R

Generator

Timer 1

020H

EVF.7

underflow signal

S

Q

R

IEF.7

Initial Reset

CLR EVF,#I instruction

Disable

DIS INT instruction

Figure 13. Interrupt event control diagram

Interrupt Enable Flag (IEF)

The interrupt enable flag is organized as an 8-bit binary register (IEF.0 to IEF.7). These bits are used

to control the interrupt conditions. It is controlled by the MOV IEF, #I instruction. When one of these

interrupts is accepted, the corresponding bit of the event flag will be reset, but the other bits are

unaffected. In interrupt subroutine, these interrupts will be disabled till the instruction MOV IEF, #I or

EN INT is executed again. To enable these interrupts, the instructions MOV IEF, #I or EN INT must

be executed again. Otherwise, these interrupts can be disabled by executing DIS INT instruction. The

bit descriptions are as follows:

7

6

5

4

3

2

1

0

IEF

w

Note: W means write only.

Publication Release Date: March 1998

Revision A3

- 23 -

Preliminary W741C20X

IEF.0 = 1 Interrupt 0 is accepted by overflow from the Divider 0.

IEF.1 = 1 Interrupt 1 is accepted by underflow from the Timer 0.

IEF.2 = 1 Interrupt 2 is accepted by a signal change at port RC.

IEF.3 is reserved.

IEF.4 = 1 Interrupt 4 is accepted by a falling edge signal at the INT pin.

IEF.5 = 1 Interrupt 5 is accepted by the serial port received completely.

IEF.6 = 1 Interrupt 6 is accepted by the serial port transmitted completely.

IEF.7 = 1 Interrupt 7 is accepted by underflow from Timer 1.

External INT

The external interrupt INT pin contains a pull-up resistor. When the HEF.4 or IEF.4 flag is set, the

falling edge of the INT pin will execute the hold mode release or interrupt subroutine. A low level on

the INT pin will release the stop mode.

Stop Mode Operation

In stop mode, all operations of the µC cease (including the operation of the oscillator). The µC enters

stop mode when the STOP instruction is executed and exits stop mode when an external trigger is

activated (by a low level on the INT pin or a falling signal on the RC port). When the designated

signal is accepted, the µC awakens and warms up, and then executes the next instruction.

Stop Mode Wake-up Enable Flag for Ports RC (SEF)

The stop mode wake-up flag for ports RC is organized as a 4-bit binary register (SEF.0 to SEF.3).

Before port RC may be used to make the device exit the stop mode, the content of the SEF must be

set first. The SEF is controlled by the MOV SEF, #I instruction. The bit descriptions are as follows:

3

2

1

0

SEF

w

Note: W means write only.

SEF 0 = 1 Device will exit stop mode when falling edge signal is applied to pin RC.0

SEF 1 = 1 Device will exit stop mode when falling edge signal is applied to pin RC.1

SEF 2 = 1 Device will exit stop mode when falling edge signal is applied to pin RC.2

SEF 3 = 1 Device will exit stop mode when falling edge signal is applied to pin RC.3

Hold Mode Operation

In hold mode, all operations of the µC cease, except for the operation of the oscillator and timer. The

µC enters hold mode when the HOLD instruction is executed. The hold mode can be released in one

of five ways: by the action of timer 0, timer 1, the divider, the INT pin, the RC port. Before the device

enters the hold mode, the HEF, PEF, and IEF flags must be set to define the hold mode release

conditions. For more details, refer to the instruction-set table and the following flow chart.

- 24 -

Preliminary W741C20X

Divider 0, /INT, Timer 0,

Timer 1, Serial I/O and

signal Change at RC Port

In

Yes

No

HOLD

Mode?

No

Interrupt

Enable?

Interrupt

Enable?

Yes

No

IEF

Flag Set?

Yes

Reset EVF Flag

Execute

Interrupt Service Routine

Reset EVF Flag

Execute

Interrupt Service Routine

HEF

Flag Set?

No

Yes

(Note)

Disable interrupt

PC <- (PC+1)

HOLD

Note: The bit of EVF corresponding to the interrupt signal will be reset.

Figure 14. Hold Mode and Interrupt Operation Flow Chart

Publication Release Date: March 1998

Revision A3

- 25 -

Preliminary W741C20X

Hold Mode Release Enable Flag (HEF)

The hold mode release enable flag is organized as an 8-bit binary register (HEF.0 to HEF.7). The

HEF is used to control the hold mode release conditions. It is controlled by the MOV HEF, #I

instruction. The bit descriptions are as follows:

7

6

5

4

3

2

1

0

HEF

w

Note: W means write only.

HEF.0 = 1 Overflow from the Divider 0 causes Hold mode to be released.

HEF.1 = 1 Underflow from Timer 0 causes Hold mode to be released.

HEF.2 = 1 Signal change at port RC causes Hold mode to be released.

HEF.3 is reserved.

HEF.4 = 1 Falling edge signal at the INT pin causes Hold mode to be released.

HEF.5 = 1 The serial port received completely causes Hold mode to be released.

HEF.6 = 1 The serial port transmitted completely causes Hold mode to be released.

HEF.7 = 1 Underflow from Timer 1 causes Hold mode to be released.

Hold Mode Release Condition Flag (HCF)

The hold mode release condition flag is organized as a 8-bit binary register (HCF0 to HCF7). It

indicates by which interrupt source the hold mode has been released, and is loaded by hardware. The

HCF can be read out by the MOVA R, HCFL and MOVA R, HCFH instructions. When any of the HCF

bits is "1," the hold mode will be released and the HOLD instruction is invalid. The HCF can be reset

by the CLR EVF or MOV HEF,#I (HEF = 0) instructions. When EVF and HEF have been reset, the

corresponding bit of HCF is reset simultaneously. The bit descriptions are as follows:

7

6

5

4

3

2

1

0

HCF

R

Note: R means read only.

HCF.0 = 1 Hold mode was released by overflow from the Divider 0

HCF.1 = 1 Hold mode was released by underflow from the timer 0

HCF.2 = 1 Hold mode was released by a signal change at port RC

HCF.3 is reserved.

HCF.4 = 1 Hold mode was released by a falling edge signal at the INT pin

HCF.5 = 1 Hold mode was released by underflow from the timer 1

HCF.6 = 1 Hold mode was released by the serial port received completely.

HCF.7 = 1 Hold mode was released by the serial port transmitted completely.

- 26 -

Preliminary W741C20X

Event Flag (EVF)

The event flag is organized as a 8-bit binary register (EVF0 to EVF7). It is set by hardware and reset

by CLR EVF,#I instruction or the occurrence of an interrupt. The bit descriptions are as follows:

7

6

5

4

3

2

1

0

EVF

R

Note: R means read only.

EVF.0 = 1 Overflow from Divider 0 occurred.

EVF.1 = 1 Underflow from Timer 0 occurred.

EVF.2 = 1 Signal change at port RC occurred.

EVF.3 is reserved.

EVF.4 = 1 Falling edge signal at the INT pin occurred.

EVF.5 = 1 The serial port received completely.

EVF.6 = 1 The serial port transmitted completely.

EVF.7 = 1 Underflow from Timer 1 occurred.

Reset Function

The W741C20X is reset either by a power-on reset or by using the external RES pin. The initial state

of the W741C20X after the reset function is executed is described below.

Program Counter (PC)

TM0, TM1

000H

Reset

MR0, MR1, PAGE registers

PSR0, PSR2, PM3 registers

IEF, HEF, HCF, PEF, EVF, SEF Reset

flags

Timer 0 input clock

FOSC/4

Timer 1 input clock

FOSC

MFP output

Low

Input/output ports RA, RB

Input/output ports RC, RD

Output port RE

Input mode

High

RA and RB ports output type

Input clock of the watchdog timer

CMOS type

FOSC/1024

Publication Release Date: March 1998

Revision A3

- 27 -

Preliminary W741C20X

ABSOLUTE MAXIMUM RATINGS

PARAMETER

Supply Voltage to Ground Potential

Applied Input/Output Voltage

Power Dissipation

RATING

UNIT

V

-0.3 to +7.0

120

V

mW

°C

Ambient Operating Temperature

Storage Temperature

0 to +70

-55 to +150

°C

Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability of the

device.

DC CHARACTERISTICS

(VDD-VSS = 3.0V, Fosc. = 32.768 KHz, Ta = 25° C; unless otherwise specified)

PARAMETER

Op. Voltage

SYM.

VDD

IOP1

IOP2

IHM1

CONDITIONS

-

MIN.

TYP.

MAX.

5.5

20

UNIT

V

2.2

-

8

Op. Current (Crystal type)

Op. Current (RC type)

No load (Ext-V)

-

µA

35

4

65

Hold Current (Crystal type)

Hold mode No

load (Ext-V)

6

Hold Current (RC type)

Stop Current (Crystal type)

Stop Current (RC type)

IHM2

ISM1

ISM2

Hold mode No

load (Ext-V)

-

16

0.1

40

2

µA

Stop mode No

load (Ext-V)

Stop mode

No load (Ext-V)

2

Input Low Voltage

VIL

VIH

-

VSS

-

0.3 VDD

V

Input High Voltage

-

0.7 VDD

-

VDD

MFP Output Low Voltage

MFP Output High Voltage

Port RA, RB Sink Current

Port RA, RB Source Current

Port RC, RD Output Low Voltage

VML

VMH

IABL

IABH

IOL = 3.5 mA

IOH = -3.5 mA

VOL = 0.9V

VOH = 2.4V

-

0.4

V

2.4

9

-

V

-

1.2

-

mA

V

0.4

-

0.4

-

VCDL IOL = 2.0 mA

Port RC, RD Output High Voltage VCDH IOH = -2.0 mA

2.4

9

-

V

Port RE Sink Current

IEL

VOL = 0.9V

VOH = 2.4V

-

mA

Port RE Source Current

IEH

0.4

1.2

-

- 28 -

Preliminary W741C20X

DC Characteristics, continued

PARAMETER

SYM.

CONDITIONS

MIN.

TYP.

MAX.

UNIT

RINT

-

50

250

1000

KΩ

INT Pull-up Resistor

DIN Pin Pull-up Resistor

RDIN

RE.2 used as

serial input pin

50

20

250

100

1000

500

KΩ

RRES

-

KΩ

RES Pull-up Resistor

AC CHARACTERISTICS

(VDD-VSS = 3.0 V, Ta = 25° C; unless otherwise specified)

PARAMETER

SYM.

CONDITIONS

RC type

MIN.

TYP.

MAX.

UNIT

-

4000

-

Crystal type 1 (Option

low speed type)

32.768

KHz

Op. Frequency

FOSC

Crystal type 2 (Option

high speed type)

400

-

4190

10

Frequency Deviation by

Voltage drop for RC

Oscillator

f(3V) - f(2.4V)

f(3V)

%

∆f

f

Instruction Cycle Time

TI

One machine cycle

-

4/FOSC

-

S

Serial Port Data Ready

Time

TDR

200

nS

Serial Port Data Hold

Time

TDH

-

200

-

nS

Reset Active Width

TRAW

TIAW

FOSC = 32.768 KHz

1

-

µS

Interrupt Active Width

Publication Release Date: March 1998

Revision A3

- 29 -

Preliminary W741C20X

PAD ASSIGNMENT & POSITIONS

2580

m

µ

29 28 27

3

2

1

4

26

25

24

23

22

21

Y

5

6

7

2280

m

µ

X

(0,0)

8

9

20

10

11

17

18

16

12 13 14 15

19

Note: The chip substrate must be connected to system ground (VSS).

PAD NO. PAD NAME

X

Y

PAD NO. PAD NAME

X

Y

1

2

3

RA2

RA3

-576.30

-819.50

-1063.00

943.70

16

17

18

RC0

RC1

RC2

215.10

476.30

722.30

-965.00

INT

4

-1115.00

671.70

19

RC3

1113.90

-959.30

RES

VSS

5

6

-1115.00

-813.30

-552.10

-302.10

-40.90

464.20

207.00

-21.00

20

21

22

23

24

25

26

27

28

29

VDD

RD0

RD1

RD2

RD3

VDD

XOUT

XIN

1113.90

1061.30

752.20

-749.30

-492.10

-264.10

-20.90

RE0

RE1

RE2

RE3

VSS

7

8

-264.20

-492.20

-749.40

-965.00

9

207.10

464.30

738.00

943.70

10

11

12

13

14

15

RB0

RB1

RB2

RB3

MFP

RA0

RA1

509.00

- 30 -

Preliminary W741C20X

TYPICAL APPLICATION CIRCUIT

Vcc

V_DD

RA0

Output Signal

RA3

Vcc

RB0

RB1

RB2

RB3

Vcc

RD0

RC0

RC1

RC2

RC3

RD1

RD2

RD3

Vcc

INT

RE0

RE1

RE2

RE3

Vcc

RES

XOUT

XIN

or

MFP

V_SS

Publication Release Date: March 1998

Revision A3

- 31 -

Preliminary W741C20X

INSTRUCTION SET TABLE

Symbol Description

ACC:

ACC.n:

WR:

Accumulator

Accumulator bit n

Working Register

PAGE:

MR0:

MR1:

PM0:

PM1:

PM2:

PM3:

PM4:

PM5:

PSR0:

PSR2:

R:

Page Register

Mode Register 0

Mode Register 1

Port Mode 0

Port Mode 1

Port Mode 2

Port Mode 3

Port Mode 4

Port Mode 5

Port Status Register 0

Port Status Register 2

Memory (RAM) of address R

Memory bit n of address R

Constant parameter

Branch or jump address

Carry Flag

R.n:

I:

L:

CF:

ZF:

Zero Flag

PC:

Program Counter

TM0L:

TM0H:

TM1L:

TM1H:

TABL:

TABH:

IEF.n:

HCF.n:

HEF.n:

SEF.n:

PEF.n:

Low nibble of the Timer 0 counter

High nibble of the Timer 0 counter

Low nibble of the Timer 1 counter

High nibble of the Timer 1 counter

Low nibble of the look-up table address buffer

High nibble of the look-up table address buffer

Interrupt Enable Flag n

HOLD mode release Condition Flag n

HOLD mode release Enable Flag n

STOP mode wake-up Enable Flag n

Port Enable Flag n

- 32 -

Preliminary W741C20X

Continued

EVF.n:

Event Flag n

Not equal

! =:

&:

AND

^:

OR

EX:

←:

Exclusive OR

Transfer direction, result

[PAGE*10H+()]: Contents of address PAGE(bit2, bit1, bit0)*10H+()

[P()]: Contents of port P

INSTRUCTION SET TABLE 1

Mnemonic

Function

Flag Affected

Cycle

Arithmetic

ADD

R, ACC

WR, #I

R, ACC

WR, #I

R, ACC

WR, #I

R, ACC

WR, #I

R, ACC

WR, #I

R, ACC

WR, #I

R, ACC

WR, #I

R, ACC

WR, #I

R, ACC

WR, #I

R, ACC

WR, #I

ZF, CF

ZF

1

ACC←(R) + (ACC)

ADD

ACC←(WR) + I

ADDR

ADC

ACC, R←(R) + (ACC)

ACC, WR←(WR) + I

ACC←(R) + (ACC) + (CF)

ACC←(WR) + I + (CF)

ACC, R←(R) + (ACC) + (CF)

ACC, WR←(WR) + I + (CF)

ACC←(R) + (ACC)

ADC

ADCR

ADU

ZF

ACC←(WR) + I

ADUR

SUB

ZF

ACC, R←(R) + (ACC)

ACC, W R←(WR) + I

ACC←(R) - (ACC)

ZF

ZF, CF

SUB

ACC←(WR) - I

SUBR

SBC

ACC, R←(R) - (ACC)

ACC, WR←(WR) - I

ACC←(R) - (ACC) - (CF)

ACC←(WR) - I - (CF)

ACC, R←(R) - (ACC) - (CF)

ACC, WR←(WR) - I - (CF)

SBC

SBCR

Publication Release Date: March 1998

Revision A3

- 33 -

Preliminary W741C20X

Instruction Set Table 1, continued

Mnemonic

Function

ACC, R←(R) + 1

Flag Affected

ZF, CF

Cycle

INC

R

1

DEC

ZF, CF

ACC, R←(R) - 1

Logic Operations

ANL

R, ACC

WR, #I

R, ACC

W, R #I

R, ACC

WR, #I

R, ACC

WR, #I

R, ACC

WR, #I

R, ACC

WR, #I

ZF

1

ACC←(R) & (ACC)

ACC←(WR) & I

ANL

ANLR

ORL

ORLR

XRL

ACC, R←(R) & (ACC)

ACC, WR←(WR) & I

ACC←(R) (ACC)

ACC←(WR)

ACC, R←(R) (ACC)

ACC, WR←(WR)

I

ACC←(R) EX (ACC)

ACC←(WR) EX I

XRL

XRLR

Branch

JMP

ACC, R←(R) EX (ACC)

ACC, WR←(WR) EX I

L

1

PC10~PC0←L10~L0

JB0

L

PC10~PC0←L10~L0; if ACC.0 = "1"

PC10~PC0←L10~L0; if ACC.1 = "1"

PC10~PC0←L10~L0; if ACC.2 = "1"

PC10~PC0←L10~L0; if ACC.3 = "1"

PC10~PC0←L10~L0; if ACC = 0

PC10~PC0←L10~L0; if ACC ! = 0

PC10~PC0←L10~L0; if CF = "1"

PC10~PC0←L10~L0; if CF != "1"

ACC, R←(R) - 1; skip if ACC = 0

ACC, R←(R) - 1; skip if ACC != 0

Skip if R.0 = "1"

JB1

L

JB2

L

JB3

L

JZ

L

JNZ

L

JC

L

JNC

L

DSKZ

DSKNZ

SKB0

SKB1

SKB2

SKB3

R

ZF, CF

Skip if R.1 = "1"

Skip if R.2 = "1"

Skip if R.3 = "1"

- 34 -

Preliminary W741C20X

Instruction Set Table 1, continued

Mnemonic

Function

Flag Affected

Cycle

Data Move

MOV

MOVA

MOV

MOVC

WR, R

R, WR

WR, R

R, WR

R, ACC

ACC, R

R, #I

1

2

1

2

WR←(R)

R←(WR)

ZF

ACC, WR←(R)

ACC, R←(WR)

R←(ACC)

ZF

ACC←(R)

R←I

WR, @R

@R, WR

TABL, R

TABH, R

R

WR←[PR(bit2, bit1, bit0)x10H +(R)]

[PR(bit2, bit1, bit0)x10H +(R)]←WR

TABL←(R)

TABH←(R)

R←[TAB × 10H + (ACC)]

WR←[(I6 ~ I0) × 10H + (ACC)]

WR, #I

Input & Output

MOVA

MOV

SOP

R, RA

ZF

1

2

1

ACC, R←[RA]

ACC, R←[RB]

ACC, R←[RC]

ACC, R←[RD]

[RA]←(R)

R, RB

R, RC

R, RD

RA, R

RB, R

RC, R

RD, R

RE, R

R

[RB]←(R)

[RC]←(R)

[RD]←(R)

[RE]←(R)

RE0←(R), (ACC); RE1←CLK

R, ACC ←SIB; RE3←CLK

[MFP]← I

SIP

R

MOV

MFP, #I

Flag & Register

MOVA

MOV

R, PAGE

ZF

1

ACC, R←PAGE (Page Register)

PAGE, R

MR0, #I

MR1, #I

PAGE←(R)

MR0←I

MR1←I

Publication Release Date: March 1998

Revision A3

- 35 -

Preliminary W741C20X

Instruction Set Table 1, continued

Mnemonic

Function

Flag Affected

Cycle

MOV

MOVA

MOV

MOVA

CLR

PAGE, #I

R, CF

1

PAGE←I

ZF

CF

ZF

ACC.0, R.0←CF

CF, R

CF←(R.0)

R, HCFL

R, HCFH

PMF, #I

PM0, #I

PM1, #I

PM2, #I

PM3, #I

PM4, #I

PM5, #I

EVF, #I

PEF, #I

IEF, #I

ACC, R←HCF0~HCF3

ACC, R←HCF4~HCF7

Clear Parameter Flag if In = 1

Set Parameter Flag if In = 1

Port Mode 0← I

SET

MOV

CLR

Port Mode 1← I

Port Mode 2← I

Port Mode 3← I

Port Mode 4← I

Port Mode 5← I

Clear Event Flag if In = 1

Set/Reset Port Enable Flag

Set/Reset Interrupt Enable Flag

MOV

HEF, #I

Set/Reset HOLD mode release

Enable Flag

MOV

SEF, #I

Set/Reset STOP mode wake-up

Enable Flag for RC port

1

MOVA

CLR

R, PSR0

PSR0

R, PSR2

PSR2

CF

ZF

1

ACC, R←Port Status Register 0

Clear Port Status Register 0

ACC, R←Port Status Register 2

Clear Port Status Register 2

Set Carry Flag

MOVA

CLR

SET

CF

CLR

CF

Clear Carry Flag

CLR

DIVR0

WDT

Clear the last 4-bit of the Divider 0

Clear WatchDog Timer

CLR

- 36 -

Preliminary W741C20X

Instruction Set Table 1, continued

Mnemonic

Function

Flag Affected

ZF, CF

Cycle

Shift & Rotate

SHRC

RRC

R

1

ACC.n, R.n←(R.n+1);

ACC.3, R.3←0; CF←R.0

ACC.n, R.n←(R.n+1);

ZF, CF

ACC.3, R.3←CF; CF←R.0

ACC.n, R.n←(R.n-1);

SHLC

RLC

ZF, CF

ACC.0, R.0←0; CF←R.3

ACC.n, R.n←(R.n-1);

ZF, CF

ACC.0, R.0←CF; CF←R.3

Timer

MOV

TM0L, R

TM0H, R

TM0, #I

1

TM0L←(R)

TM0H←(R)

Timer 0 set

TM1L←(R)

TM1H←(R)

Timer 1 set

MOV

TM1L, R

TM1H, R

TM1, #I

MOV

Subroutine

CALL

L

1

STACK←(PC)+1;

PC10 ~ PC0←L10 ~ L0

(PC)←STACK

RTN

Other

HOLD

STOP

NOP

EN

Enter Hold mode

1

Enter Stop mode

No Operation

INT

Enable Interrupt Function

Disable Interrupt Function

DIS

Publication Release Date: March 1998

Revision A3

- 37 -

Preliminary W741C20X

INSTRUCTION SET TABLE 2

ADC R, ACC

Add R to ACC with CF

Machine Code:

Machine Cycle:

Operation:

0

R6

0

1

0

R5 R4 R3 R2 R1 R0

1

ACC ← (R) + (ACC) + (CF)

The contents of the data memory location addressed by R6 to R0, ACC,

and CF are binary added and the result is loaded into the ACC.

Description:

Flag Affected:

CF & ZF

ADC WR, #I

Add immediate data to WR with CF

Machine Code:

Machine Cycle:

Operation:

0

1

0

I3 I2 I1 I0 W3 W2 W1 W0

1

ACC ← (WR) + I + (CF)

The contents of the Working Register (WR), I and CF are binary added and

the result is loaded into the ACC.

Description:

Flag Affected:

CF & ZF

ADCR R, ACC

Add R to ACC with CF

Machine Code:

Machine Cycle:

Operation:

0

1

0

1

0

R6 R5 R4 R3 R2 R1 R0

1

ACC, R ← (R) + (ACC) + (CF)

Description:

The contents of the data memory location addressed by R6 to R0, ACC,

and CF are binary added and the result is placed in the ACC and the data

memory.

Flag Affected:

CF & ZF

- 38 -

Preliminary W741C20X

Instruction Set Table 2, continued

ADCR WR, #I

Add immediate data to WR with CF

Machine Code:

0

1

0

1

I3 I2 I1 I0 W3 W2 W1 W0

Machine Cycle:

Operation:

1

ACC, WR ← (WR) + I + (CF)

Description:

The contents of the Working Register (WR), I, CF are binary added and the

result is placed in the ACC and the WR.

Flag Affected:

CF & ZF

ADD R, ACC

Add R to ACC

Machine Code:

0

1

0

R6 R5 R4 R3 R2 R1 R0

Machine Cycle:

Operation:

1

ACC ← (R) + (ACC)

Description:

The contents of the data memory location addressed by R6 to R0 and ACC

are binary added and the result is loaded into the ACC.

Flag Affected:

CF & ZF

ADD

WR, #I

Add immediate data to WR

Machine Code:

0

1

0

I3 I2 I1 I0 W3 W2 W1 W0

Machine Cycle:

Operation:

1

ACC ← (WR) + I

Description:

The contents of the Working Register (WR) and the immediate data I are

binary added and the result is loaded into the ACC.

Flag Affected:

CF & ZF

Publication Release Date: March 1998

- 39 -

Revision A3

Preliminary W741C20X

Instruction Set Table 2, continued

ADDR R, ACC

Add R to ACC

0

1

0

1

0

R6 R5 R4 R3 R2 R1 R0

Machine Code:

1

Machine Cycle:

Operation:

ACC, R ← (R) + (ACC)

The contents of the data memory location addressed by R6 to R0 and ACC

are binary added and the result is placed in the ACC and the data memory.

Description:

Flag Affected:

CF & ZF

ADDR WR, #I

Add immediate data to WR

0

1

0

1

I3 I2 I1 I0

W2 W1 W0

W3

Machine Code:

1

Machine Cycle:

Operation:

ACC, WR ← (WR) + I

The contents of the Working Register (WR) and the immediate data I are

binary added and the result is placed in the ACC and the WR.

Description:

CF & ZF

Flag Affected:

ADU R, ACC

Add R to ACC and Carry Flag unchange

0

1

0

1

0

R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

ACC ← (R) + (ACC)

Description:

The contents of the data memory location addressed by R6 to R0 and ACC

are binary added and the result is loaded into the ACC.

ZF

Flag Affected:

- 40 -

Preliminary W741C20X

Instruction Set Table 2, continued

ADU WR, #I

Add immediate data to WR and Carry Flag unchange

0

1

0

1

0

I3 I2 I1 I0 W3 W2 W1 W0

Machine Code:

1

Machine Cycle:

Operation:

ACC ← (WR) + I

The contents of the Working Register (WR) and the immediate data I are

binary added and the result is loaded into the ACC.

Description:

ZF

Flag Affected:

ADUR R, ACC

Machine Code:

Add R to ACC and Carry Flag unchange

0

1

0

1

0

1

0

R6 R5 R4 R3 R2 R1 R0

Machine Cycle:

Operation:

1

ACC, R ← (R) + (ACC)

Description:

The contents of the data memory location addressed by R6 to R0 and ACC

are binary added and the result is placed in the ACC and the data memory.

Flag Affected:

ZF

ADUR WR, #I

Add immediate data to WR and Carry Flag unchange

0

1

0

1

0

1

I3 I2 I1 I0 W3 W2 W1 W0

Machine Code:

Machine Cycle:

Operation:

1

ACC, WR ← (WR) + I

Description:

The contents of the Working Register (WR) and the immediate data I are

binary added and the result is placed in the WR and the ACC.

Flag Affected:

ZF

Publication Release Date: March 1998

- 41 -

Revision A3

Preliminary W741C20X

Instruction Set Table 2, continued

ANL R, ACC

And R to ACC

Machine Code:

0

1

0

1

0

1

0

R6 R5 R4 R3 R2 R1 R0

Machine Cycle:

Operation:

1

ACC ← (R) & (ACC)

Description:

The contents of the data memory location addressed by R6 to R0 and the

ACC are ANDed and the result is loaded into the ACC.

Flag Affected:

ZF

ANL

WR, #I

And immediate data to WR

Machine Code:

0

1

0

1

0

I3 I2 I1 I0 W3 W2 W1 W0

Machine Cycle:

Operation:

1

ACC ← (WR) & I

Description:

The contents of the Working Register (WR) and the immediate data I are

ANDed and the result is loaded into the ACC.

Flag Affected:

ANLR R, ACC

Machine Code:

ZF

And R to ACC

0

1

0

1

0

1

0

R6 R5 R4 R3 R2 R1 R0

Machine Cycle:

Operation:

1

ACC, R ← (R) & (ACC)

Description:

The contents of the data memory location addressed by R6 to R0 and the

ACC are ANDed and the result is placed in the data memory and the ACC.

Flag Affected:

ZF

- 42 -

Preliminary W741C20X

Instruction set table 2, continued

ANLR WR, #I

And immediate data to WR

Machine Code:

0

1

0

1

I3 I2 I1 I0 W3 W2 W1 W0

Machine Cycle:

Operation:

1

ACC, WR ← (WR) & I

Description:

The contents of the Working Register (WR) and the immediate data I are

ANDed and the result is placed in the WR and the ACC.

Flag Affected:

ZF

CALL

L

Call subroutine

0

1

0

L10 L9 L8

L7 L6 L5 L4 L3 L2 L1 L0

Machine Code:

Machine Cycle:

Operation:

1

STACK ← (PC)+1;

PC10 ~ PC0 ← L10 ~ L0

Description:

The next program counter (PC10 to PC0) is saved in the STACK and then

the direct address (L10 to L0) is loaded into the program counter.

A subroutine is called.

CLR

CF

Clear CF

0

1

0

1

0

Machine Code:

Machine Cycle:

Operation:

1

Clear CF

Description:

Clear Carry Flag to 0.

CF

Flag Affected:

Publication Release Date: March 1998

Revision A3

- 43 -

Preliminary W741C20X

Instruction Set Table 2, continued

CLR

DIVR0

Reset the last 4 bits of the DIVideR 0

Machine Code:

0

1

0

1

0

Machine Cycle:

Operation:

1

Reset the last 4 bits of the divider 0

Description:

When this instruction is executed, the last 4 bits of the divider 0 (14 bits)

are

reset.

CLR EVF, #I

Clear EVent Flag

0

1

0

I7 I6 I5 I4 I3 I2 I1 I0

Machine Code:

Machine Cycle:

Operation:

1

Clear event flag

The condition corresponding to the data specified by I7 to I0 is controlled.

Description:

I0~I7

Mode after execution of instruction

I0 = 1 EVF0 caused by overflow from the divider 0 is reset.

EVF1 caused by underflow from the timer 0 is reset.

I1 = 1

I2 = 1 EVF2 caused by the signal change at port RC is reset.

Reserved

I3

I4 = 1 EVF4 caused by the falling edge signal on INT pin is reset.

I5 = 1 EVF5 caused by the serial port received completely.

I6 = 1 EVF6 caused by the serial port transmitted completely.

I7 = 1 EVF7 caused by underflow from the timer 1 is reset.

- 44 -

Preliminary W741C20X

Instruction Set Table 2, continued

CLR PMF, #I

Clear ParaMeter Flag

0

1

0

1

0

1

0

I3 I2 I1 I0

Machine Code:

Machine Cycle:

Operation:

1

Clear Parameter Flag

Description of each flag:

I0, I1, I2 : Reserved

Description:

I3 = 1 : The input clock of the watchdog timer is Fosc/1024.

CLR

PSR0

Clear Port Status Register 0 (RC port signal change flag)

0

1

0

1

0

Machine Code:

Machine Cycle:

Operation:

1

Clear Port Status Register 0 (RC port signal change flag)

When this instruction is executed, the RC port signal change flag (PSR0) is

cleared.

Description:

CLR

PSR2

Clear Port Status Register 2 (serial port status flags)

0

1

0

1

0

1

0

1

0

Machine Code:

Machine Cycle:

Operation:

1

Clear Port Status Register 2 (serial port status flags)

When this instruction is executed, the serial port status flags (PSR2) are

cleared.

Description:

CLR

WDT

Reset the last 4 bits of the Watchdog Timer

0

1

0

1

0

Machine Code:

Machine Cycle:

Operation:

1

Reset the last 4 bits of the watchdog timer

Description:

When this instruction is executed, the last 4 bits of the watchdog timer are

reset.

Publication Release Date: March 1998

- 45 -

Revision A3

Preliminary W741C20X

Instruction Set Table 2, continued

DEC

R

Decrement R content

0

1

0

1

0

1

0

1

R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

ACC, R ← (R) - 1

Description:

Decrement the data memory content and load result into the ACC and the

data memory.

Flag Affected:

CF & ZF

DIS INT

Disable Interrupt function

0

1

0

1

0

1

0

Machine Code:

Machine Cycle:

Operation:

1

Disable interrupt function

Description:

Interrupt function is inhibited by executing this instruction.

DSKNZ

R

Decrement R content then skip if ACC ! = 0

0

1

0

1

0

1

R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

ACC, R ← (R) - 1;

PC ← (PC) + 2 if ACC ! = 0

Description:

Decrement the data memory content and load result into the ACC and the

data memory. If ACC ! = 0, the program counter is incremented by 2 and

produces a skip.

Flag Affected:

CF & ZF

- 46 -

Preliminary W741C20X

Instruction Set Table 2, continued

DSKZ

R

Decrement R content then skip if ACC is zero

Machine Code:

Machine Cycle:

0

1

0

1

0

R6 R5 R4 R3 R2 R1 R0

1

ACC, R ← (R) - 1;

PC ← (PC) + 2 if ACC = 0

Operation:

Decrement the data memory content and load result into the ACC and the

data memory. If ACC = 0, the program counter is incremented by 2 and

produces a skip.

Description:

Flag Affected:

CF & ZF

EN

INT

Enable Interrupt function

0

1

0

1

0

1

0

Machine Code:

1

Machine Cycle:

Operation:

Enable interrupt function

This instruction enables the interrupt function.

Description:

HOLD

Enter the HOLD mode

Machine Code:

0

1

0

Machine Cycle:

Operation:

1

Enter the HOLD mode

Description:

The following two conditions cause the HOLD mode to be released.

(1) An interrupt is accepted.

(2) The HOLD release condition specified by the HEF is met.

In HOLD mode, when an interrupt is accepted the HOLD mode will be

released and the interrupt service routine will be executed. After

completing the interrupt service routine by executing the RTN instruction,

the µC will enter HOLD mode again.

Publication Release Date: March 1998

- 47 -

Revision A3

Preliminary W741C20X

Instruction Set Table 2, continued

INC

R

Increment R content

0

1

0

1

0

1

0

R6 R5 R4 R3 R2 R1

R0

Machine Code:

Machine Cycle:

Operation:

1

ACC, R ← (R) + 1

Increment the data memory content and load the result into the ACC and

the data memory.

Description:

Flag Affected:

CF & ZF

JB0

L

Jump when bit 0 of ACC is "1"

1

0

L10 L9 L8

L7 L6 L5 L4 L3 L2 L1 L0

Machine Code:

Machine Cycle:

Operation:

1

PC10 ~ PC0 ← L10 ~ L0; if ACC.0 = "1"

Description:

If bit 0 of the ACC is "1," PC10 to PC0 of the program counter are replaced

with the data specified by L10 to L0 and a jump occurs. If bit 0 of the ACC

is "0," the program counter (PC) is incremented.

JB1

L

Jump when bit 1 of ACC is "1"

1

0

1

0

L10 L9 L8

L7 L6 L5 L4 L3 L2 L1 L0

Machine Code:

Machine Cycle:

Operation:

1

PC10 ~ PC0 ← L10 ~ L0; if ACC.1 = "1"

Description:

If bit 1 of the ACC is "1," PC10 to PC0 of the program counter are replaced

with the data specified by L10 to L0 and a jump occurs. If bit 1 of the ACC

is "0," the program counter (PC) is incremented.

JB2

L

Jump when bit 2 of ACC is "1"

1

0

1

0

L10 L9 L8

L7 L6 L5 L4 L3 L2 L1 L0

Machine Code:

Machine Cycle:

Operation:

1

PC10 ~ PC0 ← L10 ~ L0; if ACC.2="1"

Description:

If bit 2 of the ACC is "1," PC10 to PC0 of the program counter are replaced

with the data specified by L10 to L0 and a jump occurs. If bit 2 of the ACC

is "0," the program counter (PC) is incremented.

- 48 -

Preliminary W741C20X

Instruction Set Table 2, continued

JB3

L

Jump when bit 3 of ACC is "1"

Machine Code:

Machine Cycle:

Operation:

1

0

1

0

L10 L9 L8

L7 L6 L5 L4 L3 L2 L1 L0

1

PC10 ~ PC0 ← L10 ~ L0; if ACC.3 = "1"

Description:

If bit 3 of the ACC is "1," PC10 to PC0 of the program counter are replaced

with the data specified by L10 to L0 and a jump occurs. If bit 3 of the ACC

is "0," the program counter (PC) is incremented.

JC

L

Jump when CF is "1"

Machine Code:

Machine Cycle:

Operation:

1

0

L10 L9 L8

L7 L6 L5 L4 L3 L2 L1 L0

1

PC10 ~ PC0 ← L10 ~ L0; if CF = "1"

Description:

If CF is "1," PC10 to PC0 of the program counter are replaced with the data

specified by L10 to L0 and a jump occurs. If the CF is "0," the program

counter (PC) is incremented.

JMP

L

Jump absolutely

Machine Code:

Machine Cycle:

Operation:

0

1

0

L10 L9 L8

L7 L6 L5 L4 L3 L2 L1 L0

1

PC10 ~ PC0 ← L10 ~ L0

Description:

PC10 to PC0 of the program counter are replaced with the data specified

by L10 to L0 and an unconditional jump occurs.

Publication Release Date: March 1998

- 49 -

Revision A3

Preliminary W741C20X

Instruction Set Table 2, continued

JNC

L

Jump when CF is not "1"

1

0

1

0

L10 L9 L8

L7 L6 L5 L4 L3 L2 L1 L0

Machine Code:

Machine Cycle:

Operation:

1

PC10 ~ PC0 ← L10 ~ L0; if CF = "0"

Description:

If CF is "0," PC10 to PC0 of the program counter are replaced with the data

specified by L10 to L0 and a jump occurs. If CF is "1," the program counter

(PC) is incremented.

JNZ

L

Jump when ACC is not zero

1

0

L10 L9 L8

L7 L6 L5 L4 L3 L2 L1 L0

Machine Code:

Machine Cycle:

Operation:

1

PC10 ~ PC0 ← L10 ~ L0; if ACC ! = 0

Description:

If the ACC is not zero, PC10 to PC0 of the program counter are replaced

with the data specified by L10 to L0 and a jump occurs. If the ACC is zero,

the program counter (PC) is incremented.

JZ

L

Jump when ACC is zero

1

0

L10 L9 L8

L7 L6 L5 L4 L3 L2 L1 L0

Machine Code:

Machine Cycle:

Operation:

1

PC10 ~ PC0 ← L10 ~ L0; if ACC = 0

Description:

If the ACC is zero, PC10 to PC0 of the program counter are replaced with

the data specified by L10 to L0 and a jump occurs. If the ACC is not zero,

the program counter (PC) is incremented.

- 50 -

Preliminary W741C20X

Instruction Set Table 2, continued

MOV ACC, R

Move R content to ACC

0

1

0

1

0

1

R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

ACC ← (R)

Description:

The contents of the data memory location addressed by R6 to R0 are

loaded into the ACC.

ZF

MOV CF, R

Move R.0 content to CF

0

1

0

1

0

R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

CF ← (R.0)

Description:

The bit 0 content of the data memory location addressed by R6 to R0 is

loaded into CF.

CF

Flag Affected:

Publication Release Date: March 1998

- 51 -

Revision A3

Preliminary W741C20X

Instruction Set Table 2, continued

MOV HEF, #I

Set/Reset Hold mode release Enable Flag

0

1

0

1

I7 I6 I5 I4 I3 I2 I1 I0

Machine Code:

1

Machine Cycle:

Operation:

Hold mode release enable flag control

Description:

Operation

I0~I7

The HEF0 is set so that overflow from the divider 0 caused

the HOLD mode to be released.

I0 = 1

The HEF1 is set so that underflow from the Timer 0 caused

the HOLD mode to be released.

I1 = 1

The HEF2 is set so that signal change at port RC caused

the HOLD mode to be released.

I2 = 1

I3

Reserved

The HEF4 is set so that the falling edge signal at the INT pin

caused the HOLD mode to be released.

I4 = 1

The HEF5 is set so that the serial port received completely

caused the HOLD mode to be released.

I5 = 1

I6 = 1

I7 = 1

The HEF6 is set so that the serial port transmitted completely

caused the HOLD mode to be released.

The HEF7 is set so that underflow from the Timer 1 caused

the HOLD mode to be released.

- 52 -

Preliminary W741C20X

Instruction Set Table 2, continued

MOV

IEF, #I

Set/Reset Interrupt Enable Flag

0

1

0

1

0

1

I7 I6 I5 I4 I3 I2 I1 I0

Machine Code:

Machine Cycle:

Operation:

1

Interrupt Enable flag Control

The interrupt enable flag corresponding to the data specified by I7 - I0 is

controlled:

Description:

Operation

I0~I7

The IEF0 is set so that interrupt 0 (overflow from the

divider 0) is accepted.

I0 = 1

The IEF1 is set so that interrupt 1 (underflow from the

Timer 0) is accepted.

I1 = 1

The IEF2 is set so that interrupt 2 (signal change at port

RC) is accepted.

I2 = 1

I3

Reserved

The IEF4 is set so that interrupt 4 (falling edge signal

at the INT pin) is accepted.

I4 = 1

The IEF5 is set so that interrupt 5 (the serial port received

completely) is accepted.

I5 = 1

I6 = 1

I7 = 1

The IEF6 is set so that interrupt 6 (the serial port

transmitted completely) is accepted.

The IEF7 is set so that interrupt 7 (underflow from the

Timer 1) is accepted.

Publication Release Date: March 1998

Revision A3

- 53 -

Preliminary W741C20X

Instruction Set Table 2, continued

MOV MFP, #I

Modulation Frequency Pulse generator

0

1

0

1

I7 I6 I5 I4 I3 I2 I1 I0

0

Machine Code:

1

Machine Cycle:

Operation:

[MFP] ← I

Description:

If the bit 2 of MR1 is "0," the waveform specified by I7 to I0 is delivered at

the MFP output pin (MFP). The relation between the waveform and

immediate data I is shown as follows:

I5~I0

I0 = 1

I1 = 1

I2 = 1

I3 = 1

I4 = 1

I5 = 1

Fosc

512

Fosc

256

Fosc

4096

Fosc Fosc

16384 32768

Fosc

8192

Signal

I7

0

1

I6

0

1

0

1

Signal

Low

High

Fosc/16

Fosc/8

MOV MR0, #I

Load immediate data to Mode Register 0 (MR0)

0

1

0

1

0

I3 I2 I1 I0

Machine Code:

Machine Cycle:

Operation:

1

MR0 ← I

Description:

The immediate data I are loaded to the MR0.

MR0 bits description:

= 0 The fundamental frequency of Timer 0 is Fosc/4

= 1 The fundamental frequency of Timer 0 is Fosc/1024

bit 0

Reserved

bit 1

bit 2

= 0 Timer 0 stop down-counting

= 1 Timer 0 start down-counting

bit 3

- 54 -

Preliminary W741C20X

Instruction Set Table 2, continued

MOV MR1, #I

Load immediate data to Mode Register 1 (MR1)

0

1

0

1

0

I3 I2 I1 I0

Machine Code:

Machine Cycle:

Operation:

1

MR1 ← I

Description:

The immediate data I are loaded to the MR1.

MR1 bit description:

= 0 The internal fundamental frequency of Timer 1 is Fosc

= 1 The internal fundamental frequency of Timer 1 is Fosc/64

bit0

bit1

= 0 The fundamental frequency source of Timer 1 is

internal clock

= 1 The fundamental frequency source of Timer 1 is

external clock via RC.0 input pin

= 0 The specified waveform of the MFP generator is

delivered at the MFP output pin

bit2

bit3

= 1 The specified frequency of the Timer 1 is delivered at

the MFP output pin

= 0 Timer 1 stop down-counting

= 1 Timer 1 start down-counting

Publication Release Date: March 1998

Revision A3

- 55 -

Preliminary W741C20X

Instruction Set Table 2, continued

MOV PAGE, #I

Load immediate data to Page Register

0

1

0

1

0

1

0

1

0

I3 I2 I1 I0

Machine Code:

Machine Cycle:

Operation:

1

Page Register ← I

Description:

The immediate data I are loaded to the PR.

Bit 3 is reserved.

Bit 0, bit 1, and bit 2 indirect addressing mode preselect bits:

bit2

0

bit1

0

bit0

0

= Page 0 (00H~0FH)

= Page 1 (10H~1FH)

= Page 2 (20H~2FH)

= Page 3 (30H~3FH)

= Page 4 (40H~4FH)

= Page 5 (50H~5FH)

= Page 6 (60H~6FH)

= Page 7 (70H~7FH)

0

1

0

1

0

1

0

1

0

1

0

1

MOV PEF, #I

Set/Reset Port Enable Flag

0

1

0

1

0

I3 I2 I1 I0

Machine Code:

Machine Cycle:

Operation:

1

Port enable flag control

Description:

The data specified by I can cause HOLD mode to be released or an

interrupt to occur. The signal change on port RC is specified.

Signal change at port RC

I0~I7

RC0

RC1

RC2

RC3

I0 = 1

I1 = 1

I2 = 1

I3 = 1

- 56 -

Preliminary W741C20X

Instruction Set Table 2, continued

MOV PM0, #I

Set/Reset Port Mode 0 register

0

1

0

1

0

1

0

I2 I1 I0

I3

Machine Code:

Machine Cycle:

Operation:

1

Set/Reset Port mode 0 register

Description:

I0 = 0: RA port is CMOS type; I0 = 1: RA port is NMOS type.

I1 = 0: RB port is CMOS type; I1 = 1: RB port is NMOS type.

I2 = 0: RC port pull-high resistor is disabled;

I2 = 1: RC port pull-high resistor is enabled.

I3 = 0: RD port pull-high resistor is disabled;

I3 = 1: RD port pull-high resistor is enabled.

MOV PM1, #I

RA port independent Input/Output control

0

1

0

1

0

1

0

I3 I2 I1 I0

Machine Code:

Machine Cycle:

Operation:

1

RA port 4 pins input/output control is independent.

Description:

I0 = 0: RA.0 is output pin; I0 = 1: RA.0 is input pin.

I1 = 0: RA.1 is output pin; I1 = 1: RA.1 is input pin.

I2 = 0: RA.2 is output pin; I2 = 1: RA.2 is input pin.

I3 = 0: RA.3 is output pin; I3 = 1: RA.3 is input pin.

Default condition RA port is input mode (PM = 1111B).

MOV PM2, #I

RB port independent Input/Output control

0

1

0

1

0

1

0

I3 I2 I1 I0

Machine Code:

Machine Cycle:

Operation:

1

RB port 4 pins input/output control is independent.

Description:

I0 = 0: RB.0 is output pin; I0 = 1: RB.0 is input pin.

I1 = 0: RB.1 is output pin; I1 = 1: RB.1 is input pin.

I2 = 0: RB.2 is output pin; I2 = 1: RB.2 is input pin.

I3 = 0: RB.3 is output pin; I3 = 1: RB.3 is input pin.

Default condition RB port is input mode (PM2 = 1111B).

Publication Release Date: March 1998

Revision A3

- 57 -

Preliminary W741C20X

Instruction Set Table 2, continued

MOV PM3, #I

Set/Reset Port Mode 3 register

0

1

0

1

0

1

0

I2 I1 I0

I3

Machine Code:

Machine Cycle:

Operation:

1

Set/Reset Port mode 3 register

I0 is reserved.

Description:

I1 = 0: The port RE is used as the output of the internal parallel port RT.

I1 = 1: The port RE works as the serial input/output port.

I2 is reserved.

I3 = 0: Serial Tx rate = FOSC/2

I3 = 1: Serial Tx rate = FOSC/256

MOV PM4, #I

RC port independent Input/Output control

0

1

0

1

0

I3 I2 I1 I0

Machine Code:

Machine Cycle:

Operation:

1

RC port 4 pins input/output control is independent.

Description:

I0 = 0: RC.0 is output pin; I0 = 1: RC.0 is input pin.

I1 = 0: RC.1 is output pin; I1 = 1: RC.1 is input pin.

I2 = 0: RC.2 is output pin; I2 = 1: RC.2 is input pin.

I3 = 0: RC.3 is output pin; I3 = 1: RC.3 is input pin.

Default condition RC port is input mode (PM4 = 1111B).

MOV PM5, #I

RD port independent Input/Output control

0

1

0

1

0

I3 I2 I1 I0

Machine Code:

Machine Cycle:

Operation:

1

RD port 4 pins input/output control is independent.

Description:

I0 = 0: RD.0 is output pin; I0 = 1: RD.0 is input pin.

I1 = 0: RD.1 is output pin; I1 = 1: RD.1 is input pin.

I2 = 0: RD.2 is output pin; I2 = 1: RD.2 is input pin.

I3 = 0: RD.3 is output pin; I3 = 1: RD.3 is input pin.

Default condition RD port is input mode (PM5 = 1111B).

- 58 -

Preliminary W741C20X

Instruction Set Table 2, continued

MOV R, ACC

Move ACC content to R

0

1

0

1

0

1

R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

R ← (ACC)

Description:

The contents of the ACC are loaded to the data memory location

addressed by R6 to R0.

MOVA R, RA

Input RA port data to ACC & R

0

1

0

1

0

1

0

R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

ACC , R ← [RA]

Description:

The data on port RA are loaded into the data memory location addressed

by R6 to R0 and the ACC.

ZF

Flag Affected:

MOVA R, RB

Machine Code:

Machine Cycle:

Operation:

Input RB port data to ACC & R

0

1

0

1

0

1

R6 R5 R4 R3 R2 R1 R0

1

ACC , R ← [RB]

Description:

The data on port RB are loaded into the data memory location addressed

by R6 to R0 and the ACC.

ZF

Flag Affected:

Publication Release Date: March 1998

- 59 -

Revision A3

Preliminary W741C20X

Instruction Set Table 2, continued

MOVA R, RC

Input RC port data to ACC & R

0

1

0

1

0

1

0

R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

ACC , R ← [RC]

Description:

The input data on the input port RC are loaded into the data memory

location addressed by R6 to R0 and the ACC.

ZF

Flag Affected:

MOVA R, RD

Machine Code:

Machine Cycle:

Operation:

Input RD port data to ACC & R

0

1

0

1

0

1

R6 R5 R4 R3 R2 R1 R0

1

ACC , R ← [RD]

Description:

The input data on the input port RD are loaded into the data memory

location addressed by R6 to R0 and the ACC.

ZF

Flag Affected:

MOV R, WR

Move WR content to R

1

W3 W2 W1

W0 R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

R ← (WR)

Description:

The contents of the WR are loaded to the data memory location addressed

by R6 to R0.

- 60 -

Preliminary W741C20X

Instruction Set Table 2, continued

MOV

R, #I

Load immediate data to R

1

0

1

I3 I2 I1

I0 R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

R ← I

Description:

The immediate data I are loaded to the data memory location addressed by

R6 to R0.

MOV RA, R

Output R content to RA port

0

1

0

1

0

1

0

R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

[RA] ← (R)

Description:

The data in the data memory location addressed by R6 to R0 are output to

the port RA.

MOV RB, R

Output R content to RB port

0

1

0

1

0

1

0

1

R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

[RB] ← (R)

Description:

The contents of the data memory location addressed by R6 to R0 are

output to the port RB.

MOV RC, R

Output R content to RC port

1

0

1

0

R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

[RC] ← (R)

Description:

The data in the data memory location addressed by R6 to R0 are output to

the port RC.

Publication Release Date: March 1998

- 61 -

Revision A3

Preliminary W741C20X

Instruction Set Table 2, continued

MOV RD, R

Output R content to RD port

1

0

1

0

1

R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

[RD] ← (R)

Description:

The contents of the data memory location addressed by R6 to R0 are

output to the port RD.

MOV RE, R

Output R content to port RE

0

1

0

1

0

R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

[RE] ← (R)

Description:

The contents of the data memory location addressed by R6 to R0 are

output to port RE.

MOV SEF, #I

Set/Reset STOP mode waked-up Enable Flag for port RC

0

1

0

1

0

1

0

I3 I2 I1 I0

Machine Code:

Machine Cycle:

Operation:

1

Set/reset STOP mode wake-up enable flag for port RC

Description:

The data specified by I cause a wake-up from the STOP mode. The falling-

edge signal on port RC can be specified independently.

Falling edge signal at port RC

I0~I7

I0 = 1

I1 = 1

I2 = 1

I3 = 1

RC0

RC1

RC2

RC3

- 62 -

Preliminary W741C20X

Instruction Set Table 2, continued

MOV TM0, #I

Timer 0 set

0

1

0

I7 I6 I5 I4 I3 I2 I1 I0

Machine Code:

Machine Cycle:

Operation:

1

Timer 0 set

The data specified by I7 to I0 is loaded to the Timer 0 to start the timer.

Description:

MOV TM0L, R

Move R content to TM0L

0

1

0

1

0

R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

TM0L ← (R)

Description:

The content of the data memory location addressed by R6 to R0 are loaded

into the TM0L.

MOV TM0H, R

Move R content to TM0H

0

1

0

1

0

1

R6 R5 R4 R3 R2 R1 R0

Machine code:

Machine Cycle:

Operation:

1

TM0H ← (R)

Description:

The content of the data memory location addressed by R6 to R0 are loaded

into the TM0H.

MOV TM1, #I

Timer 1 set

0

1

0

1

I7 I6 I5 I4 I3 I2 I1 I0

Machine Code:

Machine Cycle:

Operation:

1

Timer 1 set

The data specified by I7 to I0 is loaded to the Timer 1 to start the timer.

Description:

Publication Release Date: March 1998

- 63 -

Revision A3

Preliminary W741C20X

Instruction Set Table 2, continued

MOV TM1L, R

Move R content to TM1L

0

1

0

1

0

1

0

R6 R5 R4 R3 R2 R1 R0

Machine Code:

1

Machine Cycle:

Operation:

TM1L ← (R)

The content of the data memory location addressed by R6 to R0 are loaded

into the TM1L.

Description:

MOV TM1H, R

Move R content to TM1H

0

1

0

1

0

1

R6 R5 R4 R3 R2 R1 R0

Machine code:

Machine Cycle:

Operation:

1

TM1H ← (R)

The content of the data memory location addressed by R6 to R0 are loaded

into the TM1H.

Description:

MOV

WR, R

Move R content to WR

1

0

1

W3 W2 W1

W0 R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

WR ← (R)

Description:

The contents of the data memory location addressed by R6 to R0 are

loaded to the WR.

MOV WR, @R

Indirect load from R to WR

1

0

1

W3 W2 W1

W0 R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

2

WR ← [PR (bit2, bit1, bit0) × 10H + (R)]

Description:

The data memory contents of address [PR (bit2, bit1, bit0) × 10H + (R)] are

loaded to the WR.

- 64 -

Preliminary W741C20X

Instruction Set Table 2, continued

MOV @R, WR

Indirect load from WR to R

1

0

1

W3 W2 W1

W0 R6 R5 R4 R3 R2 R1 R0

Machine Code:

2

Machine Cycle:

Operation:

[PR (bit2, bit1, bit0) × 10H + (R)] ← WR

Description:

The contents of the WR are loaded to the data memory location addressed

by [PR (bit2, bit1, bit0) × 10H + (R)] .

MOV PAGE, R

Move R content to Page Register

0

1

0

1

0

1

R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

PR ← (R)

Description:

The contents of the data memory location addressed by R6 to R0 are

loaded to the PR.

MOVA R, CF

Move CF content to ACC.0 & R.0

0

1

0

1

0

1

0

R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

ACC.0, R.0 ← (CF)

Description:

The content of CF is loaded to bit 0 of the data memory location addressed

by R6 to R0 and the ACC. The other bits of the data memory and ACC are

reset to "0."

ZF

Flag Affected:

Publication Release Date: March 1998

- 65 -

Revision A3

Preliminary W741C20X

Instruction Set Table 2, continued

MOVA R, HCFH

Move HCF4~7 to ACC & R

0

1

0

1

0

1

R6 R5 R4 R3 R2 R1 R0

Machine Code:

1

Machine Cycle:

Operation:

ACC, R ← HCF4~7

Description:

The contents of HCF bit 4 to bit 7 (HCF4 to HCF7) are loaded to the data

memory location addressed by R6 to R0 and the ACC. The ACC contents

and the meaning of the bits after execution of this instruction are as

follows:

HCF4: "1" when the HOLD mode is released by the falling edge signal at the

INT pin.

Bit 0

HCF5: "1" when the HOLD mode is released by underflow from Timer 1.

Bit 1

Bit 2

Bit 3

HCF6: "1" when the HOLD mode is released by the serial port receiving completely.

HCF7: "1" when the HOLD mode is released by the serial port transmitting

completely.

Flag Affected:

ZF

Move HCF0~3 to ACC & R

MOVA R, HCFL

0

1

0

1

0

1

0

R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

ACC, R ← HCF0~3

Description:

The contents of HCF bit 0 to bit 3 (HCF0 to HCF3) are loaded to the data

memory location addressed by R6 to R0 and the ACC. The ACC contents

and the meaning of the bits after execution of this instruction are as

follows:

HCF0: "1" when the HOLD mode is released by

Bit 0

overflow from the Divider 0.

HCF1: "1" when the HOLD mode is released by

underflow from Timer 0.

Bit 1

HCF2: "1" when the HOLD mode is released by

Bit 2

a signal change on port RC.

Bit 3

Reserved.

Flag Affected:

ZF

- 66 -

Preliminary W741C20X

Instruction Set Table 2, continued

MOVA R, PAGE

Move Page Register content to ACC & R

0

1

0

1

R6 R5 R4 R3 R2 R1 R0

Machine Code:

1

Machine Cycle:

Operation:

ACC , R ← (Page Register)

Description:

The contents of the Page Register (PR) are loaded to the data memory

location addressed by R6 to R0 and the ACC.

ZF

Flag Affected:

MOVA R, PSR0

Move Port Status Register 0 content to ACC & R

0

1

0

1

0

R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

ACC, R ← RC port signal change flag (PSR0)

Description:

The contents of the RC port signal change flag (PSR0) are loaded to the

data memory location addressed by R6 to R0 and the ACC. When the

signal changes on any pin of the RC port, the corresponding signal change

flag should be set to 1. Otherwise, it should be 0.

ZF

Flag Affected:

MOVA R, PSR2

Move Port Status Register 0 content to ACC & R

0

1

0

1

0

R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

ACC, R ← Serial I/O port status flags (PSR2)

Description:

The contents of the serial I/O port status flags (PSR2) are loaded to the

data memory location addressed by R6 to R0 and the ACC.

ZF

Flag Affected:

Publication Release Date: March 1998

- 67 -

Revision A3

Preliminary W741C20X

Instruction Set Table 2, continued

MOVA R, WR

Move WR content to ACC & R

0

1

W3 W2 W1

W0 R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

ACC, R ← (WR)

Description:

The contents of the WR are loaded to the ACC and the data memory

location addressed by R6 to R0.

Flag Affected:

ZF

MOVA WR, R

Move R content to ACC & WR

0

1

0

1

W3 W2 W1

W0 R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

ACC, WR ← (R)

Description:

The contents of the data memory location addressed by R6 to R0 are

loaded to the WR and the ACC.

Flag Affected:

ZF

MOV TABL, R

Move R content to TABL

1

0

1

0

R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

TABL ← (R)

Description:

The content of the data memory location addressed by R6 to R0 are loaded

into the TABL.

MOV TABH, R

Move R content to TABH

1

0

1

0

1

R6 R5 R4 R3 R2 R1 R0

Machine code:

Machine Cycle:

Operation:

1

TABH ← (R)

Description:

The content of the data memory location addressed by R6 to R0 are loaded

into the TABH.

- 68 -

Preliminary W741C20X

Instruction Set Table 2, continued

MOVC R

Move look-up table ROM addressed by TABL and TABH to R

1

0

1

0

1

0

R6 R5 R4 R3 R2 R1 R0

Machine code:

2

Machine Cycle:

Operation:

WR ← [(TABH) × 10H + (TABL)]

Description:

The contents of the look-up table ROM location addressed by TABH and

TABL are loaded to R.

NOP

No Operation

0

Machine Code:

Machine Cycle:

Operation:

1

No Operation

OR R to ACC

ORL R, ACC

0

1

0

1

0

R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

ACC ← (R) (ACC)

Description:

The contents of the data memory location addressed by R6 to R0 and the

ACC are ORed and the result is loaded into the ACC.

Flag Affected:

ZF

ORL WR , #I

OR immediate data to WR

0

1

0

I3 I2 I1 I0 W3 W2 W1 W0

Machine Code:

Machine Cycle:

Operation:

1

ACC ← (WR)

I

Description:

The contents of the Working Register (WR) and the immediate data I are

ORed and the result is loaded into the ACC.

Flag Affected:

ZF

Publication Release Date: March 1998

- 69 -

Revision A3

Preliminary W741C20X

Instruction Set Table 2, continued

ORLR R, ACC

OR R to ACC

0

1

0

1

0

R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

ACC, R ← (R) (ACC)

Description:

The contents of the data memory location addressed by R6 to R0 and the

ACC are ORed and the result is placed in the data memory and the ACC.

ZF

Flag Affected:

ORLR WR , #I

OR immediate data to WR

0

1

I3 I2 I1 I0 W3 W2 W1 W0

Machine Code:

Machine Cycle:

Operation:

1

ACC, WR ← (WR)

I

Description:

The contents of the Working Register(WR) and the immediate data I are

ORed and the result is placed in the WR and the ACC.

ZF

Flag Affected:

RLC

R

Rotate Left R with CF

0

1

0

1

0

1

R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

ACC.n, R.n ← (R.n-1); ACC.0, R.0 ← CF; CF ← R.3

Description:

The contents of the ACC and the data memory location addressed by R6 to

R0 are rotated left one bit, bit 3 is rotated into CF, and CF rotated into bit 0

(LSB). The same contents are loaded into the ACC.

CF & ZF

Flag Affected:

- 70 -

Preliminary W741C20X

Instruction Set Table 2, continued

RRC

R

Rotate Right R with CF

0

1

0

1

0

1

R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

ACC.n, R.n ← (R.n+1); ACC.3, R.3 ← CF; CF ← R.0

Description:

The contents of the ACC and the data memory location addressed by R6 to

R0 are rotated right one bit, bit 0 is rotated into CF, and CF is rotated into

bit 3 (MSB). The same contents are loaded into the ACC.

CF & ZF

Flag Affected:

RTN

Return from subroutine

0

1

0

Machine Code:

Machine Cycle:

Operation:

1

(PC) ← STACK

Description:

The program counter (PC10 to PC0) is restored from the stack. A return

from a subroutine occurs.

SBC R, ACC

Subtract ACC from R with Borrow

0

1

0

1

0

R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

ACC ← (R) - (ACC) - (CF)

Description:

The contents of the ACC and CF are binary subtracted from the contents of

the data memory location addressed by R6 to R0 and the result is loaded

into the ACC.

CF & ZF

Flag Affected:

Publication Release Date: March 1998

- 71 -

Revision A3

Preliminary W741C20X

Instruction Set Table 2, continued

SBC WR, #I

Subtract immediate data from WR with Borrow

0

1

0

I3 I2 I1 I0 W3 W2 W1 W0

Machine Code:

1

Machine Cycle:

Operation:

ACC ← (WR) - I - (CF)

Description:

The immediate data I and CF are binary subtracted from the contents of

the WR and the result is loaded into the ACC.

CF & ZF

Flag Affected:

SBCR R, ACC

Subtract ACC from R with Borrow

0

R6

0

1

0

1

0

R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

ACC, R ← (R) - (ACC) - (CF)

Description:

The contents of the ACC and CF are binary subtracted from the contents of

the data memory location addressed by R6 to R0 and the result is placed in

the ACC and the data memory.

CF & ZF

Flag Affected:

SBCR WR, #I

Subtract immediate data from WR with Borrow

0

1

I3 I2 I1 I0 W3 W2 W1 W0

Machine Code:

Machine Cycle:

Operation:

1

ACC, R ← (WR) - I - (CF)

Description:

The immediate data I and CF are binary subtracted from the contents of

the WR and the result is placed in the ACC and the WR.

CF & ZF

Flag Affected:

- 72 -

Preliminary W741C20X

Instruction Set Table 2, continued

SET

CF

Set CF

0

1

0

1

0

1

0

Machine Code:

Machine Cycle:

Operation:

1

Set CF

Description:

Set Carry Flag to 1.

CF

Flag Affected:

SET PMF, #I

Set ParaMeter Flag

0

1

0

1

0

I3 I2 I1 I0

Machine Code:

Machine Cycle:

Operation:

1

Set Parameter Flag

Description of each flag:

I0, I1, I2 : Reserved

Description:

I3 = 1 : The input clock of the watchdog timer is Fosc/16384.

SHLC

R

SHift Left R with CF and LSB = 0

0

1

0

1

0

R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

ACC.n, R.n ← (R.n-1); ACC.0, R.0 ← 0; CF ← R.3

Description:

The contents of the ACC and the data memory location addressed by R6 to

R0 are shifted left one bit, but bit 3 is shifted into CF, and bit 0 (LSB) is

replaced with "0." The same contents are loaded into the ACC.

CF & ZF

Flag Affected:

Publication Release Date: March 1998

- 73 -

Revision A3

Preliminary W741C20X

Instruction Set Table 2, continued

SHRC

R

SHift Right R with CF and MSB = 0

0

1

0

1

0

1

0

R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

ACC.n, R.n ← (R.n+1); ACC.3, R.3 ← 0; CF ← R.0

Description:

The contents of the ACC and the data memory location addressed by R6 to

R0 are shifted right one bit, but bit 0 is shifted into CF, and bit 3 (MSB) is

replaced with "0." The same contents are loaded into the ACC.

CF & ZF

Flag Affected:

SKB0

R

If bit 0 of R is equal to 1 then skip

1

0

1

0

R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

”

PC ← (PC) + 2; if R.0 = 1

Description:

If bit 0 of R is equal to 1, the program counter is incremented by 2 and a

skip is produced. If bit 0 of R is not equal to 1, the program counter (PC) is

incremented.

SKB1

R

If bit 1 of R is equal to 1 then skip

1

0

1

0

1

R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

”

PC ← (PC) + 2; if R.1 = 1

Description:

If bit 1 of R is equal to 1, the program counter is incremented by 2 and a

skip is produced. If bit 1 of R is not equal to 1, the program counter (PC) is

incremented.

- 74 -

Preliminary W741C20X

Instruction Set Table 2, continued

SKB2

R

If bit 2 of R is equal to 1 then skip

1

0

1

0

1

0

R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

”

PC ← (PC) + 2; if R.2 = 1

Description:

If bit 2 of R is equal to 1, the program counter is incremented by 2 and a

skip is produced. If bit 2 of R is not equal to 1. The program counter (PC) is

incremented.

SKB3

R

If bit 3 of R is equal to 1 then skip

1

0

1

0

1

0

1

R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

”

PC ← (PC) + 2; if R.3 = 1

Description:

If bit 3 of R is equal to 1, the program counter is incremented by 2 and a

skip is produced. If bit 3 of R is not equal to 1, the program counter (PC) is

incremented.

STOP

Enter the STOP mode

0

1

0

Machine Code:

Machine Cycle:

Operation:

1

STOP oscillator

Description:

Device enters STOP mode. When the falling edge signal of RC port is

accepted, the µC will wake up and execute the next instruction.

Publication Release Date: March 1998

- 75 -

Revision A3

Preliminary W741C20X

Instruction Set Table 2, continued

SUB R, ACC

Subtract ACC from R

0

1

0

1

0

R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

ACC ← (R) - (ACC)

Description:

The contents of the ACC are binary subtracted from the contents of the

data memory location addressed by R6 to R0 and the result is loaded into

the ACC.

CF & ZF

Flag Affected:

SUB WR , #I

Subtract immediate data from WR

0

1

0

I3 I2 I1 I0 W3 W2 W1 W0

Machine Code:

Machine Cycle:

Operation:

1

ACC ← (WR) - I

Description:

The immediate data I are binary subtracted from the contents of the WR

and the result is loaded into the ACC.

CF & ZF

Flag Affected:

SUBR R, ACC

Subtract ACC from R

0

1

0

1

0

R6 R5 R4 R3 R2 R1 R0

0

Machine Code:

Machine Cycle:

Operation:

1

ACC, R ← (R) - (ACC)

Description:

The contents of the ACC are binary subtracted from the contents of the

data memory location addressed by R6 to R0 and the result is placed in the

ACC and the data memory.

CF & ZF

Flag Affected:

- 76 -

Preliminary W741C20X

Instruction Set Table 2, continued

SUBR WR, #I

Subtract immediate data from WR

0

1

I3 I2 I1 I0 W3 W2 W1 W0

Machine Code:

Machine Cycle:

Operation:

1

ACC, WR ← (WR) - I

Description:

The immediate data I are binary subtracted from the contents of the WR

and the result is placed in the ACC and the WR.

CF & ZF

Flag Affected:

XRL R, ACC

Exclusive OR R to ACC

0

1

0

R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

ACC ← (R) EX (ACC)

Description:

The contents of the data memory location addressed by R6 to R0 and the

ACC are exclusive-ORed and the result is loaded into the ACC.

ZF

Flag Affected:

XRL WR, #I

Exclusive OR immediate data to WR

0

1

0

I3 I2 I1 I0 W3 W2 W1 W0

Machine Code:

Machine Cycle:

Operation:

1

ACC ← (WR) EX I

Description:

The contents of the Working Register (WR) and the immediate data I are

exclusive-ORed and the result is loaded into the ACC.

ZF

Flag Affected:

Publication Release Date: March 1998

- 77 -

Revision A3

Preliminary W741C20X

Instruction Set Table 2, continued

XRLR R, ACC

Exclusive OR R to ACC

0

1

0

1

0

R6 R5 R4 R3 R2 R1 R0

Machine Code:

Machine Cycle:

Operation:

1

ACC, R ← (R) EX (ACC)

Description:

The contents of the data memory location addressed by R6 to R0 and the

ACC are exclusive-ORed and the result is placed in the data memory and

the ACC.

ZF

Flag Affected:

XRLR WR, #I

Exclusive OR immediate data to WR

0

1

0

1

I3 I2 I1 I0 W3 W2 W1 W0

Machine Code:

Machine Cycle:

Operation:

1

ACC, WR ← (WR) EX I

Description:

The contents of the Working Register(WR) and the immediate data I are

exclusive-ORed and the result is placed in the WR and the ACC.

ZF

Flag Affected:

- 78 -

Preliminary W741C20X

PACKAGE DIMENSIONS

18L PDIP-300mil

D

18

10

1

E

1

9

E

S

c

1

2

Base Plane

A

L

Seating Plane

B

e₁

e_A

£\

B ₁

Dimension in mm

Dimension in inches

Symbol

Nom

Min.

Max. Min.

0.175

Max.

4.45

A

0.010

0.125

0.25

1

A

0.130 0.135

3.18

0.41

1.47

0.20

3.30

0.46

1.52

0.25

3.43

0.56

1.63

0.36

A₂

B

0.016 0.018

0.022

0.064

0.014

0.910

0.310

0.060

0.010

0.900

0.058

0.008

1

B

c

22.86 23.11

D

E

7.87

6.48

2.79

7.62

6.35

2.54

3.30

0.290

0.245

0.300

0.250

7.37

6.22

2.29

0.255

0.110

E1

e₁

0.090 0.100

0.140

15

3.05

0

0.120

0.130

L

3.56

15

£\

e_A

0

9.53

0.335

0.375

0.055

8.51

0.355

9.02

1.40

S

Publication Release Date: March 1998

Revision A3

- 79 -

Preliminary W741C20X

20L PDIP

D

20

11

1

E

1

10

E

S

c

1

2

A

L

Base Plane

Seating Plane

B

e₁

e_A

£\

B ₁

Dimension in inches

Min. Nom Max. Min. Nom Max.

Dimension in mm

Symbol

4.45

0.175

A

0.010

0.125

0.25

3.18

0.41

1.47

0.20

1

A

0.130 0.135

2

3.30

0.46

1.52

0.25

3.43

0.56

1.63

0.36

0.016 0.018

0.022

0.064

0.014

1.040

B

c

0.060

0.010

1.026

0.058

0.008

1

20.06 26.42

D

E

7.87

6.48

2.79

0.310

0.255

0.110

7.62

6.35

2.54

3.30

0.290

0.245

0.300

0.250

7.37

6.22

1

E

1

e

0.090 0.100

0.120 0.130

0

2.29

3.05

0.140

15

3.56

15

L

£\

0

A

e

0.335

0.375

0.075

8.51

9.53

1.91

0.355

9.02

S

- 80 -

Preliminary W741C20X

28-Lead P-DIP Skinny

D

28

15

E₁

1

14

E

S

c

Base Plane

A A₂

L

A₁

Mounting Plane

B

e ₁

e_A

a

B ₁

Dimension in mm

Dimension in Inches

Symbol

A

Min. Nom Max. Min. Nom Max.

4.45

0.175

0.010

0.125

0.25

3.18

0.41

1.47

0.20

A

1

0.130

0.135

3.30

0.46

1.52

3.43

0.56

1.63

0.36

A₂

0.016 0.018

0.022

0.064

0.014

1.400

B

B₁

c

0.060

0.010

1.388

0.058

0.008

0.25

35.26

7.87

35.56

8.13

D

0.300

0.310 0.320

7.62

7.19

2.29

3.05

0

E

7.32

2.54

3.30

7.44

2.79

0.293

0.110

0.283 0.288

0.090 0.100

E₁

e ₁

0.140

15

0.120

0

0.130

3.56

15

L

a

9.40

1.40

0.330 0.350

0.370

0.055

8.38

8.89

e _A

S

Publication Release Date: March 1998

Revision A3

- 81 -

Preliminary W741C20X

20L SOP-300mil

c

11

20

E

H_E

L

1

10

O

D

0.25

A

Y

SEATING PLANE

e

GAUGE PLANE

A1

b

Control demensions are in milmeters .

Dimension in mm

Dimension in inches

Symbol

Min.

2.35

Max.

2.65

Min.

0.093

Max.

0.104

A

A1

b

0.10

0.33

0.23

7.40

12.60

0.012

0.020

0.30

0.51

0.004

0.013

c

0.32

0.009

0.291

0.496

0.013

0.299

E

D

7.60

13.00

0.512

e

1.27 BSC

0.050 BSC

H_E

Y

10.65

0.10

1.27

8

10.00

0.394

0.419

0.004

0.40

0

0.016

0

0.050

8

L

q

- 82 -

Preliminary W741C20X

28L SOP-300mil

c

15

28

E

H_E

L

1

14

D

O

0.25

A

Y

SEATING PLANE

e

GAUGE PLANE

A1

b

Control demensions are in milmeters .

Dimension in mm

Dimension in inches

Symbol

Min.

2.35

0.10

0.33

0.23

Max.

2.65

Min.

Max.

0.104

0.012

0.020

0.093

A

A1

b

0.30

0.51

0.004

0.013

c

0.32

0.009

0.291

0.697

0.013

0.299

7.40

E

D

e

7.60

18.10

17.70

0.713

0.050 BSC

1.27 BSC

H_E

Y

10.65

0.10

1.27

8

10.00

0.394

0.419

0.004

0.050

8

0.40

0

0.016

0

L

q

Publication Release Date: March 1998

Revision A3

- 83 -

Preliminary W741C20X

NOTES:

Winbond Electronics (H.K.) Ltd.

Winbond Electronics North America Corp.

Winbond Memory Lab.

Winbond Microelectronics Corp.

Winbond Systems Lab.

2727 N. First Street, San Jose,

CA 95134, U.S.A.

Headquarters

No. 4, Creation Rd. III,

Science-Based Industrial Park,

Hsinchu, Taiwan

TEL: 886-3-5770066

Rm. 803, World Trade Square, Tower II,

123 Hoi Bun Rd., Kwun Tong,

Kowloon, Hong Kong

TEL: 852-27513100

FAX: 852-27552064

FAX: 886-3-5792766

http://www.winbond.com.tw/

Voice & Fax-on-demand: 886-2-27197006

TEL: 408-9436666

FAX: 408-5441798

Taipei Office

11F, No. 115, Sec. 3, Min-Sheng East Rd.,

Taipei, Taiwan

TEL: 886-2-27190505

FAX: 886-2-27197502

Note: All data and specifications are subject to change without notice.

- 84 -


型号：	W741C201
厂家：	WINBOND
描述：	Microcontroller, 4-Bit, MROM, 4.19MHz, CMOS, PDIP18, 0.300 INCH, PLASTIC, DIP-18 时钟微控制器光电二极管外围集成电路
文件：	总84页 (文件大小：441K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

W741C201 [WINBOND]

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W741E201

W741E202

W741E203

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