MAX1403EVKIT_技术文档

19-1490; Rev 0; 5/99

MAX1 4 0 3 EV S ys t e m

Evluates:/MAX1403

Ge n e ra l De s c rip t io n

Fe a t u re s

♦ Easy to Configure

The MAX1403 evaluation system (EV system) is a com-

plete, multichannel data-acquisition system consisting of

a MAX1403 evaluation kit (EV kit) and a Maxim 68HC11

microcontroller (µC) module. The MAX1403 is a low-

power, multichannel, serial-output analog-to-digital con-

verter (ADC). Windows 95/98™-compatible software pro-

vides a handy user interface to exercise the MAX1403’s

features. Source code in C++ and 68HC11 assembly lan-

guage is provided for the low-level portion of the software.

♦ Collects Up to 8192 Samples at Full Speed

♦ Complete Evaluation System

♦ Proven PC Board Layout

♦ Fully Assembled and Tested

Ord e rin g In fo rm a t io n

Order the EV system for comprehensive evaluation of

the MAX1403 using a personal computer. Order only

the EV kit if the 68HC11 µC module has already been

purchased with a previous Maxim EV system or for cus-

tom use in other µC-based systems.

PART

TEMP. RANGE

0°C to +70°C

INTERFACE TYPE

User-Supplied

MAX1403EVKIT

MAX1403EVL11

Windows Software

Note: The MAX1403 software can be used only with the com-

plete evaluation system (MAX1403EVL11), which includes the

68L11DMODULE together with the MAX1403EVKIT.

The MAX1403 EV kit and EV system can also be used

to evaluate the MAX1401. Simply order a free sample of

the MAX1401CAI along with the MAX1403EVKIT.

MAX1 4 0 3 EV Kit

Co m p o n e n t Lis t

MAX1 4 0 3 S t a n d -Alo n e EV Kit

The MAX1403 EV kit provides a proven PC board layout

to facilitate evaluation of the MAX1403 with user-provid-

ed software and hardware. It must be interfaced to

appropriate timing signals for proper operation. Refer to

the MAX1403 data sheet for timing requirements. See

Table 2 for jumper functions.

DESIGNATION QTY

DESCRIPTION

100pF ceramic capacitors (1206)

0.1µF ceramic capacitors (1206)

Not installed

C3–C8

C9, C10, C11

C12, C13

6

3

0

2.2µF aluminum electrolytic radial-

leaded capacitor

MAX1 4 0 3 EV S ys t e m

The MAX1403 EV system operates from a user-sup-

plied +5V to +12V DC power supply.

C15

1

J1

J2

1

0

6

2

0

1

2 x 20 right-angle socket

Female SMA connector

Not installed

JU1–JU8

R1–R6

R7, R8

R9

MAX1 4 0 3 EV S ys t e m

Co m p o n e n t Lis t

100Ω, 5% resistors (1206)

10Ω, 5% resistors (1206)

Not installed

PART

QTY

DESCRIPTION

MAX1403 Evaluation Kit

68HC11 µC Module

MAX1403EVKIT

68L11DMODULE

1

R10

Not installed

Co m p o n e n t S u p p lie rs

U1

Maxim MAX1403CAI

Maxim MAX6520EUR

(SOT23 voltage reference, 1.2V,

20ppm/°C max)

U2

1

2.4576MHz ceramic resonator

Murata CST2.45MGW040

Y1

1

3" x 4" PC board

MAX1403 evaluation kit

None

3 1/2" software disk

MAX1403 evaluation kit

Maxim 68HC11 module monitor, ROM

Version 1.1 (Version 1.0 ROM will not

work with this EV kit.)

None

1

Windows 95/98 is a trademark of Microsoft Corp.

________________________________________________________________ Maxim Integrated Products

1

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.

For small orders, phone 1-800-835-8769.

MAX1 4 0 3 EV S ys t e m

MAX1 4 0 3 EV Kit File s

_________________________Qu ic k S t a rt

Win d o w s Ap p lic a t io n P ro g ra m File s

Re c o m m e n d e d Eq u ip m e n t

Obtain the following equipment before you begin:

FILE

DESCRIPTION

• A DC power supply that generates +5VDC to +12VDC

at 30mA to 50mA

Application program that runs under

Windows 95/98

MAX1403.EXE

MAX1403.HLP

KIT1403.L11

MAX1403.INI

• An IBM PC-compatible computer running Windows

95/98

Help file

Software loaded into 68HC11 microcon-

troller

• A spare serial communications port, preferably a 9-

pin plug

Program settings file

• A serial cable to connect the computer’s serial port

to the Maxim 68HC11 Module

Ex a m p le S o u rc e Co d e File s

1) Before you begin, make sure your 68HC11 module

has the Rev. 1.1 ROM. The software will not function

with the Rev. 1.0 ROM.

FILE

DESCRIPTION

Source code module for driving the

2) Carefully connect the boards by aligning the 40-pin

header of the MAX1403 EV kit with the 40-pin con-

nector of the 68HC11 module. Gently press them

together. The two boards should be flush against

one another.

MAX1403, provided for reference. Includes

definitions of the register names and low-

level access routines. Compiled with

Borland C++ 4.52. Maxim holds the copy-

right but allows customers to adapt the pro-

gram for their own use without charge.

MAX1403.CPP

3) Connect the DC power source to the µC module at

termina l b loc k J 2, loc a te d ne xt to the ON/OFF

s witc h, a long the top e d g e of the µC mod ule .

Observe the polarity marked on the board.

Header file for MAX1403.CPP, provided for

reference.

MAX1403.H

4) Connect a cable from the computer’s serial port to

the µC module. If using a 9-pin serial port, use a

straight-through, 9-pin female-to-male cable. If the

only available serial port uses a 25-pin connector, a

standard 25-pin to 9-pin adapter will be required.

The EV kit software checks the modem status lines

(CTS, DSR, DCD) to confirm that the correct port

has been selected.

6 8 HC1 6 S o u rc e Co d e File s

FILE

DESCRIPTION

Evluates:/MAX1403

Main source code for the KIT1403.L11 pro-

gram, provided for reference. Maxim holds

the copyright but allows customers to

adapt the program for their own use without

charge.

KIT1403.ASM

5) Install the software on your computer by running the

INSTALL.EXE program from the floppy disk. The

program files are copied and icons are created for

them in the Windows 95/98 Start Menu. The EV kit

s oftwa re e va lua te s b oth the MAX1403 a nd the

MAX1401.

Source code defining the program inter-

face with the Maxim 68HC11 Module ROM

(Rev. 1.1).

EVKIT.ASM

In s t a ll/Un in s t a ll P ro g ra m File s

6) Start the MAX1403 program by opening its icon in

the Start Menu.

FILE

DESCRIPTION

INSTALL.EXE

UNINST.INI

Installs the EV kit files on your computer.

Database for uninstall program.

7) The program will prompt you to connect the µC

module and turn its power on. Slide SW1 to the “ON”

position. Select the correct serial port, and click OK.

The program will automatically download the file

KIT1403.L11 to the module.

Removes the EV kit files from your comput-

UNMAXIM.EXE er. This file is automatically copied to

C:\WINDOWS during installation.

2

_______________________________________________________________________________________

MAX1 4 0 3 EV S ys t e m

Evluates:/MAX1403

8) When the software successfully establishes commu-

nication with the EV kit board, you will see a configu-

ration tool and some other windows. Verify that the

CLKIN and Reference Voltage settings are correct.

Close or minimize this dialog box.

The EV kit s oftwa re a s s ume s tha t CALOFF+ a nd

CALOFF- are grounded so that CALOFF measures 0V.

Similarly, the software assumes that CALGAIN+ is con-

ne c te d to REFIN+ a nd CALGAIN- is c onne c te d to

REFIN- so that CALGAIN measures the reference volt-

age. These two points calibrate the code-to-voltage

translation function performed in the software.

9) Apply input signals to the inputs labeled AIN1–AIN5,

at the bottom edge of the MAX1403 EV kit board.

AIN6 is analog common. Observe the readout on

the screen.

The MAX1403 automatically triggers its measurements,

unless the FSYNC control bit is set. The EV kit software

communicates with the MAX1403 at intervals deter-

mined by the Update Every combo box. To halt this

automatic update, uncheck the Update Every checkbox

or change the Update Every to a value between 100ms

and 60,000ms.

Up g ra d in g t h e 6 8 HC1 1 Mo d u le

The MAX1403 EV kit requires Rev. 1.1 of the Maxim

68HC11 Module ROM. Check the label on device U10

on the module; if it says “Rev. 1.0,” the device must be

replaced.

Normally, the microcontroller collects new data as soon

as it becomes available by using the INT pin to trigger

an interrupt service routine. If the INT pin is not used as

an interrupt, then the MAX1403 must not be operated in

free-running mode. Check or uncheck the Use INT

Interrupt checkbox to configure the evaluation kit soft-

ware.

The Rev. 1.1 ROM is a 28-pin DIP that comes with the

EV kit. If it wa s omitte d , c onta c t the fa c tory for a

replacement.

To install the new ROM, use the following procedure.

Use antistatic handling precautions. To reduce the risk

of ESD damage, gather all required materials and per-

form the installation at one sitting.

Co n fig u ra t io n To o l

The Configuration Tool controls parameters that apply

to the e ntire EV kit. Like the othe r wind ows , the

Configuration Tool can be activated from the Show

menu of the main menu bar. The CLK control should

match the external ceramic resonator or crystal that

sets the master clock frequency. The VREF Reference

Voltage control tells the software what the reference

voltage is. This is used to convert the raw A/D output

codes into the corresponding input voltage to speed

user evaluation. The Data-Rate control determines how

often the MAX1403 performs a measurement. Some

data rates provide 16-bit, noise-free resolution when

used with the SINC³filter (discussed below). The Filter

Sync control can be used to inhibit the MAX1403 from

performing its self-timed measurements. The Buffer

Inputs checkbox enables the internal input buffers. The

Burnout Test Currents checkbox enables two small

(0.1µA) current sources to provide an input stimulus.

When used with a transducer, these current sources

can be used to verify that the transducer has not failed

open or short circuit.

1) Slide the ON/OFF switch to the OFF position.

2) Using a flat-blade screwdriver, gently pry U10, the

REV 1.0 ROM, out of its socket.

3) Remove the REV 1.1 ROM from its antistatic pack-

aging.

4) Align the REV 1.1 ROM in the U10 socket pins.

Observe correct polarity (the notch at the top of the

ROM). Verify that the pins are lined up with the

socket, and gently press the ROM into place.

Proceed to the regular Quick Start instructions.

De t a ile d De s c rip t io n

_________________________o f S o ft w a re

The MAX1403 digitizes up to seven inputs. The various

program functions are grouped into windows that are

accessible from the Show menu on the main menu bar.

Ma in Dis p la y

The main display shows the calculated input voltage

a nd ra w A/D outp ut c od e for e a c h a c tive c ha nne l.

Although there are nine input channels, only certain

configurations are allowed.

At the bottom of the window are input voltage-range

selection buttons. These buttons configure all input

channels for the same input voltage range. Although

the MAX1403 can be operated with three different input

ranges at the same time, the EV kit software supports

only a single range for all channels.

Se le c t a ny s ing le c ha nne l or one of the s c a nning

sequences from the Inputs menu. AIN 1-6 designates

an analog input between the AIN1 pin and the AIN6 pin.

CALOFF designates the signal between the CALOFF+

and CALOFF- pins. CALGAIN designates the signal

between the CALGAIN+ and CALGAIN- pins.

_______________________________________________________________________________________

3

MAX1 4 0 3 EV S ys t e m

The digital filter on the MAX1403 can be configured for

SINC³or SINC¹operation, which affects the filter cutoff

frequency. (SINC¹means SIN(X) ÷ X, and SINC³means

(SIN(X) ÷ X)³.) The SINC³filter is required for 16-bit accu-

racy. The SINC¹filter provides faster settling time with less

accuracy. Alternatively, the raw modulator output can be

driven out the DOUT pin; however, the EV kit software

cannot read data from the MAX1403 in this mode.

the Begin Sampling button. Sampling rate is controlled

by the Configuration tool. Sample size is restricted to a

power of two. Sample Size controls the number of sam-

ples collected on each selected channel. After the

samples have been collected, the data is automatically

uploaded to the host and is graphed. Once displayed,

the data may be saved to a file.

While the Sampling tool is open, the other windows are

locked out. Close the Sampling tool by clicking the

Close icon in the upper corner.

Ca lib ra t io n To o l

The MAX1403 EV kit software can average the mea-

surements from the calibration channels and use the

measured values to correct the voltage displays. The

calibration algorithm assumes that the CALOFF inputs

are externally connected together and that the CAL-

GAIN inputs are externally connected to the reference

voltage (VREF). View the calibration tool by selecting it

from the Show menu.

Re g is t e r Dis p la y To o l

This tool displays all of the internal registers of the

MAX1403. Mod ify a ny b it va lue b y c he c king or

unchecking its box. (The START bit and the zero bits in

the Special Function register (SFR) cannot be modi-

fied). The Read All Registers button causes the soft-

ware to read all of the MAX1403’s registers. (Not func-

tional when the MDOUT or FULLPD bit is set.) Refer to

Table 1 for a guide to register bit functions.

The software automatically disables calibration if either

of the c a lib ra tion c ha nne ls re p orts a c od e of 0 or

262143. This is to prevent erroneous calibration when

using a transfer function that does not include both 0V

and VREF.

Communications Register (COMMS)

Setting the FSYNC control bit inhibits the MAX1403

from p e rforming its s e lf-time d me a s ure me nts . If

FSYNC = 1 when it is time to perform a measurement,

the MAX1403 simply skips that measurement. Thus,

power-line frequency rejection is not affected by the

FSYNC bit.

When Use CALOFF and CALGAIN for Calibration is

checked, the software averages the raw A/D codes for

the CALOFF and CALGAIN channels. The average is

calculated as a weighted sum of the new data and the

old average value. The Slower/Faster slide bar controls

the weight of the new data vs. the weight of the old

average.

Setting the STDBY bit places the part in low-power

standby mode. The serial interface and the CLK oscilla-

tor continue to operate. The part can be restored to

normal operation by clearing the STDBY bit.

Evluates:/MAX1403

The EV kit software assumes that all three transfer func-

tion registers are set to the same value.

Special Function Register (SFR)

Setting the MDOUT bit makes the raw modulator output

available on the DOUT pin; however, the EV kit software

cannot read data from the MAX1403 in this mode.

This calibration affects only the displayed voltage, not

the ra w c od e numb e rs . The a ve ra g e CALOFF a nd

CALGAIN code values are used as the endpoints of a

linear interpolation, with CALOFF measuring 0V and

CALGAIN measuring VREF.

Setting the FULLPD bit in the SFR register places the

part in full power-down mode. The master oscillator

does not run. To restore normal operation, click on the

Reset menu item in the main display. This causes the

68HC11 software to pulse the MAX1403 RESET pin.

The linear interpolation formula is as follows:

VREF(Code −CALOFFcode)

Voltage =

(CALGAINcode −CALOFFcode)PGAgain

Transfer Function Registers (TF1, TF2, TF3)

The three transfer function registers (TF1, TF2, TF3) con-

trol how input voltage is mapped to code values. The

transfer function registers control a programmable-gain

amplifier (PGA) and an offset-correction DAC.

Note: Whe n us ing the c a lib ra tion tool with the

MAX1403 in buffered mode, CALOFF+ and CALOFF-

should be disconnected from GND and connected

instead to REFIN+ so that they remain within the speci-

fied input range.

If U/B = 1, the transfer function maps unipolar voltages

between 0V and VREF. If U/B = 0, then the transfer

function maps bipolar voltages between -VREF and

+VREF. Next, the PGA increases the code-per-volt pro-

S a m p lin g To o l

To sample data at full speed, select Sample from the

main display menu, make your selections, and click on

4

_______________________________________________________________________________________

MAX1 4 0 3 EV S ys t e m

Evluates:/MAX1403

cessing gain, reducing the full-scale voltage range by a

factor of 1, 2, 4, 8, 16, 32, 64, or 128. Finally, the offset-

correction DAC offsets the voltage range by up to ±7/6

of the full-scale voltage range.

C = 100pF). When scanning between channels, the RC

filter’s settling time may increase the acquisition time

required for full accuracy.

Eva lu a t in g t h e MAX1 4 0 1

The MAX1401 can be evaluated by shorting across

jumpers JU6 and JU7. The MAX1401 is exactly like the

MAX1403, except that the function of pins 5, 6, 7, and 8

is changed. Instead of the OUT1/OUT2 outputs and

DS0/DS1 inputs, these pins are used to provide access

to the analog signal between the multiplexer and the

A/D converter. Tables 2 and 3 list the jumper functions

and default settings. Refer to the MAX1401 data sheet

for detailed information.

Input pins AIN1 and AIN2 are controlled by TF1. Input

pins AIN3 and AIN4 are controlled by TF2. Input pin

AIN5 is controlled by TF3. Input pin AIN6 is the analog

common.

When SCAN = 1, the CALOFF and CALGAIN channels

are controlled by TF3. When SCAN = 0, the CALOFF

and CALGAIN channels are controlled by one of the

transfer function registers, as selected by the A1 and

A0 bits.

For simplicity, the EV kit software assumes that all three

transfer functions are configured alike.

Me a s u rin g S u p p ly Cu rre n t

Supply current can be estimated by measuring the volt-

age across a series resistor. On the EV kit board, the

MAX1403 draws all of its analog and digital power

through R8, which is 10Ω. In addition, all analog supply

current flows through R7, which is also 10Ω.

De t a ile d De s c rip t io n

________________________o f Ha rd w a re

U1, the MAX1403, is a multichannel, high-resolution

A/D converter (refer to the MAX1403 data sheet). U2,

the MAX6520, is a 1.2V re fe re nc e (re fe r to the

MAX6520 data sheet). Y1 contains a ceramic resonator

and its load capacitors. R1–R6, together with C3–C8,

form anti-aliasing input filters. R8 and C11 filter the digi-

tal power supply. The analog supply comes through fil-

ter R7/C10.

Tro u b le s h o o t in g

Problem: unacceptable amounts of noise in the signal.

Collect a sample of 1024 measurements at a 60Hz data

rate. Observe whether the problem is caused by 60Hz

noise.

Any AC-powered equipment connected to the analog

signal ground can inject noise. Try replacing AC-pow-

ered DVMs with battery-powered DVMs.

In p u t Filt e rin g

The EV kit has an RC filter on each input with a time

constant of approximately 0.01µs = 10ns (R = 100Ω,

_______________________________________________________________________________________

5

MAX1 4 0 3 EV S ys t e m

Table 1. Guide to Register Bit Functions

REGISTER

BIT NAME

0/DRDY

RS2–RS0

R/W

DESCRIPTION

Start bit is zero; DIN pin must be 1 when idle.

COMMS

Register select for subsequent operation

Selects subsequent read or write operation

Causes software reset when set to 1

Activates standby power-down mode when set to 1

Inhibits the A/D converter when set to 1

Selects the active channel

RESET

STDBY

FSYNC

A1

GS1

A0

Selects the active channel

MF1

Selects the data output rate

MF0

Selects the data output rate

CLK

Selects the CLKIN frequency

FS1

Selects the data output rate

FS0

Selects the data output rate

1

3

FAST

SCAN

M1

Selects SINC filter instead of SINC

GS2

Enables the scanning sequences

Enables the CalGain channel

Enables the CalOff channel

Enables the input buffers

M0

BUFF

DIFF

Selects differential input pairs

BOUT

IOUT

X2CLK

MDOUT

FULLPD

Enables the transducer burn-out test currents

Enables the OUT1 and OUT2 current sources (MAX1403 only)

Selects the CLKIN frequency

Evluates:/MAX1403

SFR

TF1, 2, 3

DATA

Changes the DOUT and INT pins to provide raw modulator output

Activates full power-down mode. Use hardware reset to restore normal operation.

All other bits in SFR must be zero

G2–G0

U/B

Selects the PGA Gain

Selects unipolar or bipolar coding

D3–D0

D17–D0

DS1

Selects the offset correction DAC code; D3 = sign, D2–D0 = magnitude

Raw code value

Value of the DS1 input pin (MAX1403 only)

Value of the DS0 input pin (MAX1403 only)

Channel identification tag

DS0

CID2–CID0

6

______________________________________________________________________________________

MAX1 4 0 3 EV S ys t e m

Evluates:/MAX1403

Table 2. Jumper Functions

JUMPER

STATE

Closed*

Open

FUNCTION

Use CalGain inputs for gain calibration (CALGAIN+ = REFIN+)

JU1

Use CalGain inputs as general purpose signal inputs

Use CalGain inputs for gain calibration (CALGAIN- = REFIN-)

Use CalGain inputs as general purpose signal inputs

Use CalOff inputs for offset calibration (CALOFF+ = GND)

Use CalOff inputs as general purpose signal inputs

Use CalOff inputs for offset calibration (CALOFF- = GND)

Use CalOff inputs as general purpose signal inputs

Use on-board reference U2 (REFIN- = GND)

Closed*

Open

JU2

JU3

JU4

JU5

Closed*

Open

Closed*

Open

Closed*

Open

REFIN+ and REFIN- must be driven by an external reference

Connects pin 5 to pin 7

Closed

Open

MAX1403: pin 5 = digital input DS1, pin 7 = current source

MAX1401: normal operation

JU6

Disconnects pin 5 from pin 7

MAX1403: pin 5 = digital input DS1, pin 7 = current source

MAX1401: insert filter between mux and A/D

Connects pin 6 to pin 8

Closed

Open

MAX1403: pin 6 = digital input DS0, pin 8 = current source

MAX1401: normal operation

JU7

JU8

Disconnects pin 6 from pin 8

MAX1403: pin 6 = digital input DS0, pin 8 = current source

MAX1401: insert filter between mux and A/D

Closed*

Open

Use on-board reference U2 (REFIN+ = 1.2V)

REFIN+ and REFIN- must be driven by an external reference

* Default trace on top layer of PC board

Table 3. Default Jumper Settings

JUMPER

JU1

STATE

Closed*

FUNCTION

Use CalGain inputs for gain calibration (CALGAIN+ = REFIN+)

Use CalGain inputs for gain calibration (CALGAIN- = REFIN-)

Use CalOff inputs for offset calibration (CALOFF+ = GND)

Use CalOff inputs for offset calibration (CALOFF- = GND)

Use on-board reference U2 (REFIN- = GND)

JU2

JU3

JU4

JU5

Disconnects pin 5 from pin 7

JU6

Open

MAX1403: pin 5 = digital input DS1, pin 7 = current source

MAX1401: insert filter between mux and A/D

Disconnects pin 6 from pin 8

JU7

JU8

Open

MAX1403: pin 6 = digital input DS0, pin 8 = current source

MAX1401: insert filter between mux and A/D

Closed*

Use on-board reference U2 (REFIN+ = 1.2V)

* Default trace on top layer of PC board

_______________________________________________________________________________________

7

MAX1 4 0 3 EV S ys t e m

2U

AMX6502

Evluates:/MAX1403

1

AMX1430

M(AX410)

Figure 1. MAX1403 EV Kit Schematic

8

_______________________________________________________________________________________

MAX1 4 0 3 EV S ys t e m

Evluates:/MAX1403

1.0"

Figure 2. MAX1403 EV Kit Component Placement Guide—Component Side

_______________________________________________________________________________________

9

MAX1 4 0 3 EV S ys t e m

1.0"

Evluates:/MAX1403

Figure 3. MAX1403 EV Kit PC Board Layout—Component Side

10 ______________________________________________________________________________________

MAX1 4 0 3 EV S ys t e m

Evluates:/MAX1403

1.0"

Figure 4. MAX1403 EV Kit PC Board Layout—Solder Side

______________________________________________________________________________________ 11

MAX1 4 0 3 EV S ys t e m

NOTES

Evluates:/MAX1403

12 ______________________________________________________________________________________

6 8 L1 1 D Mo d u le

68L1DModule

_______________Ge n e ra l De s c rip t io n

____________________Co m p o n e n t Lis t

The 68L11D module is an assembled and tested PC

board intended for use with Maxim’s low-voltage data-

acquisition evaluation kits (EV kits). The module uses

Motorola’s MC68L11D0FN2 microcontroller (µC) to col-

lect data samples using the SPI interface. It requires an

IBM PC computer and an external DC power supply of

+5V to +16V, or as specified in the appropriate EV kit

manual.

DESIGNATION QTY

DESCRIPTION

C1, C2

C3

2

1

22pF ceramic capacitors

0.01µF ceramic capacitor

0.1µF ceramic capacitors

C4–C9,

C12–C18

13

C10, C11

D1

2

1

2

1

22µF, 20V tantalum capacitors

1N4001 diode

Maxim’s 68L11D module allows customers to evaluate

selected Maxim products. It is not intended to be a

mic rop roc e s s or d e ve lop me nt p la tform, a nd Ma xim

does not support such use.

J1

40-pin, right-angle header

2-circuit terminal block

DB9 right-angle socket

Open

J2

____________________Ge t t in g S t a rt e d

All system components are guaranteed by their various

manufacturers over the +3V to +3.6V power-supply

range. Not all system components are guaranteed over

J3

JU1, JU2

LED1

R1

Light-emitting diode

10MΩ, 5% resistor

the entire 2.5V to 5V V

power-supply adjustment

DD

ra ng e . Ve rify c orre c t op e ra tion us ing the following

procedures:

R2

100kΩ potentiometer

274kΩ, 1% resistor

133kΩ, 1% resistor

200Ω, 5% resistor

1) Connect a +5V DC power source (16V max) to the

µC module at the terminal block located next to the

on/off switch, in the upper-right corner of the µC

module. Turn the power switch on.

R3

R4

2) Connect a cable from the computer’s serial port to

the µC module. If using a 9-pin serial port, use a

straight-through, 9-pin, female-to-male cable. If the

only available serial port uses a 25-pin connector, a

standard 25-pin to 9-pin adapter is required.

R5

R6

10kΩ SIP resistor pack, pin 1 common

Slide switch

SW1

SW2

U1

Momentary push-button switch

Motorola MC68L11D0FN2

Maxim MAX3232CSE

74HC00

3) Sta rt the e va lua tion kit s oftwa re on the IBM PC.

When the program asks which port the µC module is

connected to, press the space bar until the correct

port is highlighted, and then press ENTER. The soft-

ware will be in terminal-emulation mode. (If using a

g e ne ric te rmina l-e mula tion p rog ra m ins te a d of

Maxim EV kit software, select 1200 baud, eight-bit

character, no parity, one stop bit. Send a space

character to start the monitor program.)

U2

U3

U4

Maxim MAX667CSA

32k x 8 static RAM 28-pin socket

Motorola MCM6306DJ15

U5

1

4) Adjust trim potentiometer R2 for the desired V

DD

U10

U6

1

28-pin socket

74HCT245

supply voltage. Measure V

between test point

DD

TP1 and ground. The mounting hole next to R2 is

grounded.

U7

Maxim MAX708RCSA

74HC573

5) To verify correct system operation, press the ESC

key, type a capital “T”, and then select the count-

down memory test. If the memory test fails or any

U8

U9

74HC139

other malfunction is reported, the V voltage is too

DD

U10

Y1

3V, 8k x 8 ROM

8MHz crystal

low; increase V and repeat from step 4.

DD

6) Turn the power switch off and connect the µC board

to an appropriate Maxim EV kit board.

________________________________________________________________ Maxim Integrated Products

1

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.

For small orders, phone 1-800-835-8769.

6 8 L1 1 D Mo d u le

The 20 x 2-pin header (J1) connects the 68L11D mod-

ule to a Maxim EV kit. Table 2 lists the function of each

pin. Use the 68L11D module only with EV kits that are

designed to support it, and download only code that is

targeted for the Maxim 68L11D module. Downloading

incorrect object code into the 68L11D module will pro-

duce unpredictable results.

_______________De t a ile d De s c rip t io n

P o w e r Re q u ire m e n t s

The 68L11D module draws its power from a user-supplied

power source connected to terminal block J2. Note the

positive and negative markings on the board. Nominal

input voltages should be between +5V and +16V. The

input current requirement for the 68L11D module is typ-

ically 20mA plus the current drawn by the evaluation kit

(EV kit).

The 8k x 8 boot ROM (U10) checks the system and

waits for commands from the host. Refer to the EV kit

manual for specific startup procedures.

The V

supply is set by U4, a MAX667 low-dropout

DD

S o ft w a re

All s oftwa re is s up p lie d on a d is k with the EV kit.

Software operating instructions are included in the EV

kit manual.

CMOS regulator. Trim potentiometer R2 sets the supply

voltage, with an adjustment range of approximately 2.5V

to 5V. Although the board is designed primarily for 3V

applications, all of the circuitry is rated to withstand 5V

levels.

68L1DModule

S e ria l Co m m u n ic a t io n s

J3 is an RS-232 serial port, designed to be compatible

with the IBM PC 9-pin serial port. Use a straight-through

DB9 male-to-female cable to connect J3 to the IBM PC

serial port. If the only available serial port has a 25-pin

connector, use a standard 25-pin to 9-pin adapter.

Table 1 shows J3’s pinout. The hardware-handshake

lines are used by the evaluation software to confirm that

the EV kit is connected to the correct serial port.

6 8 L1 1 D Mic ro c o n t ro lle r (µC)

Mo d u le Ha rd w a re

U1 is Motorola’s 68L11D µC. Contact Motorola for µC

information, development, and support.

A MAX708R supervisory circuit on the module monitors

the V

logic supply, generates the power-on reset,

DD

and produces a reset pulse whenever the manual reset

button (SW2) is pressed. Note that the MAX708R resets

the CPU if the supply voltage falls below 2.66V.

Table 1. Serial Communications Port J3

The module provides 32kbytes of external CMOS static

RAM (U5).

NAME

FUNCTION

1

DCD

Handshake; hard-wired to DTR and DSR

The 74HCT245 octal buffer (U6) provides access to an

eight-bit port on the 40-pin interface connector. This

memory-mapped port consists of Intel-compatible read

a nd write s trob e s , four c hip s e le c ts , four a d d re s s

LSB's, and eight data bits. Table 3 lists the address

ranges for each of the memory-mapped elements on

the 68L11D module.

RS-232-compatible data output from

68L11D module

2

3

RXD

TXD

RS-232-compatible data input to

68L11D module

4

5

6

7

8

9

DTR

GND

DSR

RTS

Handshake; hard-wired to DCD and DSR

Signal ground connection

The MAX3232 is a 3V-powered, RS-232 interface volt-

age-level shifter. Its built-in charge pump uses external

capacitors to generate the output voltages necessary

to drive RS-232 lines.

Handshake; hard-wired to DCD and DTR

Handshake; hard-wired to CTS

Handshake; hard-wired to RTS

Unused

CTS

None

2

_______________________________________________________________________________________

6 8 L1 1 D Mo d u le

68L1DModule

Table 2. 40-Pin Data-Connector Signals

Table 3. 68L11D Module Memory Map

1–4

5, 6

NAME

GND

V++

FUNCTION

ADDRESS RANGE

FUNCTION

(HEX)

Ground

Unregulated input voltage

from on-board MAX667

0000-7FFF

8000-8FFF

9000-9FFF

A000-AFFF

B000-BFFF

C000-C03F

C040-C0FF

C100-CFFF

D000-D03F

D040-DFFF

E000-FFFF

User RAM area (U5)

External chip-select 0 (J1 pin 11)

External chip-select 1 (J1 pin 12)

External chip-select 2 (J1 pin 13)

External chip-select 3 (J1 pin 14)

Unused

V

DD

7, 8

V

DD

regulator

9

10

11

12

13

14

15

16

17

18

19

20–26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

Read strobe

RD

WR

Write strobe

Chip select for 8000-8FFF

Chip select for 9000-9FFF

Chip select for A000-AFFF

Chip select for B000-BFFF

Address bit 0 (LSB)

Address bit 1

CS0

CS1

CS2

Internal RAM (U1)

Unused

CS3

ADDR0

Internal register area (U1)

Unused

ADDR1

ADDR2

ADDR3

DB0

Boot ROM (U10)

Address bit 2

Address bit 3

Data bus bit 0 (LSB)

Data bus bits 1–7

General I/O port bit 0 (LSB)

General I/O port

DB1–DB7

PA0/IC3

PA1/IC2

PA2/IC1

PA3/IC4/OC5

PA4/OC4

PA5/OC3

PA6/OC2

PA7/OC1/PAI

MISO

General I/O port

General I/O port MSB

SPI master-in, slave-out

SPI master-out, slave-in

SPI serial clock

MOSI

SCK

RESERVED

E

Reserved for factory use

System E-clock output

SPI slave-select input

SS

_______________________________________________________________________________________

3

6 8 L1 1 D Mo d u le

J2

VPREREG

D1

1N4001

VDD

U4

SW1

C10

22µF

20V

C11

22µF

20V

8

7

6

5

1

DD MAX667 VIN

R3

274k

1%

2

3

4

VOUT

LBI

LBO

VSET

SHDN

VDD

1.255V

R2

100k

C16

GND

C13

C12

16

R4

133k

1%

0.1µF

V

C14

CC

VDD

1

3

4

5

0.1µF

2

6

J3-8

CTS

C1+

C1-

C2+

C2-

V+

U2

C15

68L1DModule

0.1µF

MAX3232

V-

J3-7

RTS

C3

0.01µF

C4

0.1µF

11

10

12

14

7

J3-2

RXD

T1

TXD

VDD

V

CC

J3-3

TXD

T2

R1

U7

J3-4

DTR

MAX708R

13

1

4

5

6

8

7

RXD

MR

PFI

PFO

J3-6

DSR

SW2

RESET

NC

RESET

9

8

J3-1

DCD

R2

GND

RESET

15

J3-5

GND

3

J3-9

RI

30

29

28

27

26

25

24

23

3

4

5

6

7

8

9

10

13

PA0/IN3

PA1/IN2

PA2/IN1

PA0

PC0

PC1

PC2

PC3

PC4

PC5

PC6

PC7

D0

D1

D2

D3

D4

D5

D6

D7

AS

U1

PA1

PA2

PA3

PA4

PA5

PA6

PA7

MC68L11D0FN2

PA3/IN4/OUT5

PA4/OUT4

PA5/OUT3

PA6/OUT2

POWER CONNECTIONS

GND VDD

VDD

C17

0.1µF

PA7/OUT1/PULSE ACCIN

U1 1, 2

22

PD6/AS

16

17

18

19

20

21

RXD

TXD

MISO

MOSI

SCK

SS

PD0/RXD

PD1/TXD

PD2/MISO

PD3/MOSI

PD4/SCK

PD5/SS

12

39

38

37

36

35

34

33

32

PD7/R/W

PB0

R/W

A8

A9

A10

A11

A12

A13

A14

A15

PB1

PB2

PB3

PB4

PB5

PB6

PB7

C2

22pF

14

11

15

RESET

XIRQ

IRQ

RESET

XIRQ/VPP

IRQ/CE

Y1

8.00MHz

R1

10M

44

43

42

XTAL

EXTAL

E

41

40

MODA/LIR

MODB/VSTBY

MODA

MODB

E

C1

22pF

Figure 1. 68L11D Module Schematic Diagram

_______________________________________________________________________________________

4

6 8 L1 1 D Mo d u le

68L1DModule

U9A

74HC139

2

3

4

5

6

7

11

10

9

A0

A1

Y0

I/0

I/1

I/2

I/3

I/4

I/5

I/6

I/7

D0

D1

D2

D3

D4

D5

D6

D7

A0

A1

A2

A3

A4

A5

A6

A7

A8

A9

A10

A11

A12

A13

A14

A15

A0

A1

A2

A3

A4

A5

A6

A7

A8

U5

12

13

15

16

17

18

19

8

Y1

Y2

Y3

32 x 8 STATIC RAM

7

6

IOBUFFER

CS-11XXX

5

1

4

3

E

GND

VDD

25

24

21

23

2

A9

U9B

74HC139

A10

A11

A12

A13

A14

C5

0.1µF

C7

0.1µF

12

11

10

9

14

13

26

1

A0

A1

Y0

A12

A13

CS8XXX

CS9XXX

CSAXXX

CSBXXX

Y1

Y2

Y3

20

22

27

A15

RD

WR

CS

OE

WE

15

E

IOBUFFER

1

2

11

12

13

15

16

17

18

19

10

9

8

7

6

5

4

3

25

24

10

3

DQ0

DQ1

DQ2

DQ3

DQ4

DQ5

DQ6

DQ7

D0

D1

D2

D3

D4

D5

D6

D7

A0

A1

A2

A3

A4

A5

A6

A7

A8

A9

A10

A11

A12

A13

A0

A1

A2

A3

A4

A5

A6

A7

A8

U10

9

U3A

R/W

8

27LV64 8k x 8 ROM

7

74HC00

6

5

4

5

R/W

E

6

8

VDD

RD

U3B

3

25

24

21

23

2

74HC00

A9

21

23

2

9

C6

0.1µF

C8

0.1µF

A10

A11

A12

A13

R/W

E

WR

U3C

10

26

74HC00

27

VDD

PGM

VPP

OE

1

22

20

12

13

E

11

DATA-XX1X

U3D

A13

CS-11XXX

CE

74HC00

POWER CONNECTIONS

VDD GND

1

11

OE

C

GND

AS

U8

74HC573

U3

U5

U8

U9

14

28

20

16

7

VDD

19

2

3

4

5

6

7

8

9

Q0

A0

A1

A2

A3

A4

A5

A6

A7

D0

14

10

8

D0

D1

D2

D3

D4

D5

D6

D7

18

17

16

15

14

13

12

Q1

Q2

Q3

Q4

Q5

Q6

Q7

D1

D2

D3

D4

D5

D6

D7

C18

0.1µF

U10 28

14

Figure 1. 68L11D Module Schematic Diagram (continued)

_______________________________________________________________________________________

5

6 8 L1 1 D Mo d u le

VDD

GND

J1-1

J1-2

J1-4

GND

R5

200Ω

J1-3

GND

VPREREG

VDD

J1-5

J1-6

VPREREG

VDD

LED1

J1-7

J1-8

19

RD

J1-9

J1-10

J1-12

J1-14

J1-16

J1-18

J1-20

J1-22

J1-24

J1-26

J1-28

J1-30

J1-32

J1-34

J1-36

J1-38

J1-40

WR

IOBUFFER

RD

OE

DIR

74HCT245

1

U6

CS8XXX

CSAXXX

A0

J1-11

J1-13

J1-15

J1-17

J1-19

J1-21

J1-23

J1-25

J1-27

J1-29

J1-31

J1-33

J1-35

J1-37

J1-39

CS9XXX

CSBXXX

A1

18

17

16

15

14

13

12

11

2

3

4

5

6

7

8

9

B1

EXTD0

EXTD1

EXTD2

EXTD3

EXTD4

EXTD5

EXTD6

EXTD7

A1

A2

A3

A4

A5

A6

A7

A8

D0

D1

D2

D3

D4

D5

D6

D7

B2

B3

B4

B5

B6

B7

B8

A2

A3

68L1DModule

EXTD0

EXTD2

EXTD4

EXTD6

PA0/IN3

PA2/IN1

PA4/OUT4

PA6/OUT2

MISO

EXTD1

EXTD3

EXTD5

VDD

C9

0.1µF

EXTD7

VDD GND

20 10

U6

PA1/IN2

PA3/IN4/OUT5

PA5/OUT3

PA7/OUT1/PULSE ACCIN

VDD

MOSI

RESERVED

R6G

10k

8

R6A

10k

SCK

R6F

10k

SS

7

2

E

XIRQ

IRQ

VDD

SS

R6E

10k

R6B

10k

6

3

R6H

10k

R6C

10k

JU1

JU2

9

4

5

MODA

MODB

R6I

10k

R6D

10k

10

MODB

Figure 1. 68L11D Module Schematic Diagram (continued)

6

_______________________________________________________________________________________

6 8 L1 1 D Mo d u le

68L1DModule

Figure 2. 68L11D Module Component Placement Guide

Figure 3. 68L11D Module PC Board Layout—Component Side

_______________________________________________________________________________________

7

6 8 L1 1 D Mo d u le

68L1DModule

Figure 4. 68L11D Module PC Board Layout—Solder Side

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are

implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

8 _____________________Ma x im In t e g ra t e d P ro d u c t s , 1 2 0 S a n Ga b rie l Drive , S u n n yva le , CA 9 4 0 8 6 4 0 8 -7 3 7 -7 6 0 0

Printed USA

is a registered trademark of Maxim Integrated Products.


型号：	MAX1403EVKIT
厂家：	MAXIM INTEGRATED PRODUCTS
描述：	Easy to Configure
文件：	总20页 (文件大小：1550K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

MAX1403EVKIT [MAXIM]

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