R8C-3MT [RENESAS]
Sample Program: 3-Minute Timer; 示例程序： 3分钟计时器
| 型号： | R8C-3MT |
| 厂家： | 
RENESAS TECHNOLOGY CORP |
| 描述： | Sample Program: 3-Minute Timer |
| 文件： | 总21页 (文件大小：106K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
APPLICATION NOTE
R8C/Tiny Series
Sample Program: 3-Minute Timer
1. Abstract
The 3-minute timer uses the following functions:
• Timer X (timer mode)
• Timer Z (programmable waveform generation mode)
2. Introduction
The example described in this application note is intended for use in the R8C/17 group of
microcomputers.
This program can also be used when operating other microcomputers within the R8C/Tiny, provided
they have the same SFR (Special Function Registers) as the R8C/17 microcomputers. However, since it
is possible that some functions of the R8C/Tiny series will have been altered for functional
enhancements, etc., please be sure to obtain the SFR header file from the Renesas Web site shown
below.
http://www.renesas.com/en/r8ctiny
Operation (1) The 3-minute timer has two separate modes:
• Standby mode
• 3-minute timer mode
SW4(INT0)
Standby mode Key depressed
3-minute timer mode
After reset
SW1(CNTR0)
Key depressed
(2) After reset, the microcomputer goes to standby mode.
(3) If SW4 (INT0) is pressed during standby mode, the microcomputer goes to 3-minute timer
mode.
(4) In 3-minute timer mode, the microcomputer executes a 3-minute count operation.
(5) When the microcomputer has finished counting 3 minutes, it sounds a buzzer two times
and goes to standby mode. (Buzzer operation will be detailed later.)
(6) If SW1 (CNTR0) is pressed during 3-minute timer mode, the microcomputer goes to
standby mode.
(7) Key input is sampled at 10 ms intervals, and is confirmed to have been entered when
sampled low three times consecutively. (Chattering elimination)
(8) The key inputs SW4 (INT0) and SW1 (CNTR0) are active-low. (When low, the key is
pressed; when high, not pressed.)
(9) During 3-minute timer mode, the status is indicated by LEDs according to the passage of
time, as shown below.
LED indications for the passage of time:
LED1 (red)
LED2 (green)
LED3 (green)
LED4 (green)
2 minutes or more remaining time
1 minute or more remaining time
Off
Off
Off
Off
On
On
Flashes every
500 ms
Flashes every
500 ms
Off
Off
On
Off
Off
Off
Flashes every
500 ms
Off
10 seconds or more remaining time
Flashes every
250 ms
Off
Off
10 seconds or less remaining time
0 second remaining time (buzzer sounded)
Off
REJ05B0272-0200Z/Rev.2.00
July 2004
Page 1 of 21
R8C/Tiny Series
Sample Program: 3-Minute Timer
(10) During standby mode, the status is indicated by LEDs, as shown below.
LED indications during standby mode:
LED1 (red)
LED2 (green)
Off
LED3 (green)
Off
LED4 (green)
Off
During standby mode
On
(11) The LED1, LED2, LED3 and LED4 are active-low. (When low, the LED lights; when
high, the LED goes out.)
(12) The buzzer on/off signal is output from P13 (TZOUT) using timer-Z programmable
waveform mode.
(13) The buzzer is output with 1 kHz (50% duty cycle), repeatedly turned on and off twice at
200 ms intervals, and at the end of the sequence, turned off again for another 200 ms.
Buzzer output timing sequence:
Sequence No.
1
2
3
4
Buzzer status
Output and stop time
ON (output)
200 ms
OFF (stop)
200 ms
ON (output)
200 ms
OFF (stop)
400 ms
3. About the Program
3.1 Timer X (Timer Mode)
The timer X (timer mode) is used to maintain a constant main loop period.
The set value of the timer X is shown below.
100µs
Timer X
Prescaler X
Main loop, 10 ms
1/8
20MHz
Set value = (100 – 1)
Set value = (250 – 1)
Settings of the Timer X Mode Register
b7
b0
Timer X Mode Register [address 008B16] TXMR
0 0 0 0 1 0 0 0
Selects timer mode
INT1/CNTR0 polarity select bit
Timer X count start flag Set to “1” when count starts
Set to “0” in timer mode
Other than pulse period measurement mode
Set to “0” in timer mode
Settings of the Timer Count Source Setup Register
b7
b0
Timer Count Source Setup Register [address 008E16] TCSS
0 0 0 1 0 0 0 1
Timer X count source Set 01: 1/8
Reserved bit. Set to “0”.
Timer Z count source Set 01: 1/8
Reserved bit. Set to “0”.
When the respective registers are set up as shown above, the timer X interrupt request bit is cyclically
set at 10 ms intervals.
Before the main processing, the program checks the timer X interrupt request bit to see if 10 ms has
elapsed. If 10 ms has elapsed, the program clears the timer X interrupt request bit and executes the
main processing. If 10 ms has not elapsed yet, the program waits until the timer X interrupt request bit
is set.
REJ05B0272-0200Z/Rev.2.00
July 2004
Page 2 of 21
R8C/Tiny Series
Sample Program: 3-Minute Timer
3.2 Timer Z (Programmable Waveform Generation Mode)
The timer Z (programmable waveform generation mode) is used to sound a buzzer.
Waveform generation with 1 kHz (50% duty cycle) is accomplished by setting up the registers as shown
below. The output level is set by using the timer Z output level latch (TZOPL) in the Timer Z Waveform
Output Control Register (PUM). Setting the timer Z output level latch (TZOPL) to “0” causes the device
to output a high during the primary period, a low during the secondary period, and a low when the
timer is inactive.
Settings of the Timer Z Waveform Output Control Register
b7
b0
Timer Z Waveform Output Control Register [address 008416] PUM
Reserved bit. Set to “0”.
0 0 0 0 0 0 0 0
Timer Z output level latch
High during primary period, low during secondary period, and low when the timer is
inactive
INT0 pin one-shot trigger control bit
INT0 pin one-shot trigger polarity select bit
When the timer Z starts counting, the device outputs a high during the primary period and a low during
the secondary period from P13 (TZOUT), and when the timer Z stops counting, the device outputs a low.
The timer Z set values are shown below.
Buzzer output =
high, 500 µs
Timer Z primary
10µs
Prescaler Z
1/8
20MHz
Set value = (50 – 1)
Set value = (25 – 1)
Timer Z secondary
Set value = (50 – 1)
Buzzer output =
low, 500 µs
Settings of the Timer Count Source Setup Register
b7
b0
Timer Count Source Setup Register [address 008E16] TCSS
Timer X count source Set 01: 1/8
0 0 0 1 0 0 0 1
Reserved bit. Set to “0”.
Timer Z count source Set 01: 1/8
Reserved bit. Set to “0”.
Settings of the Timer Z Mode Register
b7
b0
Timer Z Mode Register [address 008016] TZMR
0 1 0 1 0 0 0 0
Reserved bit. Set to “0”.
01: Programmable waveform generation mode
Set to “1” in programmable waveform generation mode.
Timer Z count start flag
REJ05B0272-0200Z/Rev.2.00
July 2004
Page 3 of 21
R8C/Tiny Series
Sample Program: 3-Minute Timer
3.3 Chattering Elimination
To protect the key input against chattering noise, SW1 and SW4 are read multiple times to confirm that
the detected input levels are the same. For the 3-minute timer, key input is sampled at 10 ms intervals,
and is confirmed to have been entered when sampled low three times consecutively.
REJ05B0272-0200Z/Rev.2.00
July 2004
Page 4 of 21
R8C/Tiny Series
Sample Program: 3-Minute Timer
4. Flowchart
4.1 Initial Settings and Main Loop
Reset
; Disables interrupts
asm("FCLR I");
prcr = 1;
; Removes protection of the system control registers
; XIN-XOUT pin
cm13 = 1;
cm15 = 1;
cm05 = 0;
cm16 = 0;
cm17 = 0;
cm06 = 0;
asm("nop");
asm("nop");
; Selects XIN-XOUT drive capability; set to HIGH
; Main clock oscillation
; Main clock not divided
; Enables main clock division CM16, CM17
; Wait until stabilizes
; Wait until stabilizes
; Wait until stabilizes
asm("nop");
asm("nop");
ocd2 = 0;
; Wait until stabilizes
; Selects the main clock
; Protects the system control registers
; Initializes the SFR (port initialization and timer setup)
prcr = 0;
Initialize SFR
SFR_INITIAL
; Enables interrupts
asm("FSET I");
; Wait for timer X request
No
Main period elapsed (10 ms)?
Yes
; Clears the timer X request flag
ir txic = 0;
; Refreshes the port direction register
Reset SFR
SFR_REF
Port output
PORT_OUT
; Sets the port for output (LED and buzzer)
; Sets the port for input (key input processing)
; Soft timer (10 ms based timer value subtraction)
Port intput
PORT_IN
Soft timer processing
STIMER
REJ05B0272-0200Z/Rev.2.00
July 2004
Page 5 of 21
R8C/Tiny Series
Sample Program: 3-Minute Timer
4.2 SFR Initialization
sfr_init
p1 = 0x16;
p4 = 0;
; Initializes port P1
; Initializes port P4
tcss = 0x11;
prex = 250-1
tx = 100-1;
txs = 1;
; Timer X = divided-by-8, timer Z = divided-by-8
; Prescaler X = 250 –1
; Timer X = 100 – 1
; Timer X starts counting
prez = 25-1;
; Prescaler Z = 25 – 1
tzsc = 50-1;
tzpr = 50-1;
tzmr = 0x50;
pum = 0;
; Timer Z secondary register = 50 – 1
; Timer Z primary register = 50 – 1
; Timer Z mode = programmable waveform generation mode
; Timer Z waveform output control register = 0
; Timer Z stops counting
tzs = 0;
; Refreshes the SFR
Refresh SFR
sfr_ref
RTS
4.3 SFR Refresh
sfr_ref
pd1 = 0x1E;
pd4 = 0;
; Initializes/refreshes the port P1 direction register
; Initializes/refreshes the port P4 direction register
RTS
REJ05B0272-0200Z/Rev.2.00
July 2004
Page 6 of 21
R8C/Tiny Series
Sample Program: 3-Minute Timer
4.4 Port Output
port_out
No
mode = 1
; Turns only the red LED on
; Turns buzzer off
p1 = 0x06;
tzs = 0;
Yes
No
tm_ledon <= 0
RTS
Yes
Yes
cnt3min > 12000
Led_on = 1;
No
No
cnt3min > 1000
Yes
; Sets LED-on time
tm_ledon = 25;
tm_ledon = 50;
No
; Switches over LED on/off
led_on = 0
Yes
led_on = 0;
led_on = 1;
Yes
led_on = 1
; LED turn-on processing by time
Yes
No
cnt3min > 6000
No
p1 = 0x10;
Yes
cnt3min > 0
No
p1 = 0x12;
p1 = 0x06;
No
cnt3min = 0
; Buzzer output
currently on
Yes
; LED turn-off processing
p1 = 0x16;
p1 = 0x06;
1
REJ05B0272-0200Z/Rev.2.00
July 2004
Page 7 of 21
R8C/Tiny Series
Sample Program: 3-Minute Timer
1
No
No
; Determines buzzer output
tm_buzzer = 20;
cnt3min = 0 & mode = 1
Yes
; Buzzer output currently on or turned off
tm_buzzer <= 0
Yes
RTS
tm_buzzer = 20;
Yes
Yes
md_buzzer = 0
No
md_buzzer = 2
; Timer Z starts counting
tzs = 1;
No
; Sets buzzer mode
md_buzzer + 1;
RTS
Yes
Yes
Yes
md buzzer = 1
No
md_buzzer = 3
No
md_buzzer = 4
No
; Timer Z stops counting
tzs = 0;
; Sets buzzer mode
md_buzzer + 1;
RTS
mode = 0;
; Mode = standby mode
; Initializes buzzer mode
md_buzzer = 0;
RTS
REJ05B0272-0200Z/Rev.2.00
July 2004
Page 8 of 21
R8C/Tiny Series
Sample Program: 3-Minute Timer
4.5 Port Input
port_in
i = 1;
No
SW4 = SW_ON
Yes
i = 0;
sw4_bit << 1;
sw4_bit | i;
; Reserves storage in which to save the input data
; Saves the input data
sw4_bit & 7;
; Deletes 5 high-order bits
No
sw4_bit = 0 | sw4_bit = 7
Yes
No
sw4_bit = 0
Yes
; Valid data = high
; Valid data = low
fixsw4 = 1;
fixsw4 = 0;
No
mode = 0
Yes
; Changes modes
mode = 1;
; Sets 3-minute time
cnt3min = 18000;
; Starts from LED off
led_on = 0;
i = 1;
No
SW1 = SW_ON
Yes
i = 0;
sw1_bit << 1;
sw1_bit | i;
; Reserves storage in which to save the input data
; Saves the input data
sw1_bit & 7;
; Deletes 5 high-order bits
2
REJ05B0272-0200Z/Rev.2.00
July 2004
Page 9 of 21
R8C/Tiny Series
Sample Program: 3-Minute Timer
2
No
sw1_bit = 0 | sw1_bit = 7
Yes
No
sw1_bit = 0
; Valid data = high
Yes
fixsw1 = 1;
; Valid data = low
fixsw1 = 0;
No
mode = 1
Yes
mode = 0;
cnt3min = 0;
RTS
REJ05B0272-0200Z/Rev.2.00
July 2004
Page 10 of 21
R8C/Tiny Series
Sample Program: 3-Minute Timer
4.6 Soft Timer Processing
stimer
No
No
; Mode = 3-minute timer mode
mode = 1
Yes
; Checks for underflow
cnt3min != 0
Yes
cnt3min - 1;
; Subtracts 3-minute measurement timer
; Checks for underflow
No
tm_ledon != 0
Yes
tm_buzzer - 1;
; Subtracts LED-on time
No
tm_buzzer != 0
; Checks for underflow
Yes
tm_ledon - 1;
; Subtracts buzzer-on time
RTS
REJ05B0272-0200Z/Rev.2.00
July 2004
Page 11 of 21
R8C/Tiny Series
Sample Program: 3-Minute Timer
5. Sample Program
/************************************************************************************
*
*
*
*
*
*
*
*
*
*
*
*
File Name
Contents
: 3min_timer.h
: definition of R8C/17 Group SFR
Copyright, 2004 RENESAS TECHNOLOGY CORPORATION
AND RENESAS SOLUTIONS CORPORATION
Version
note
*
: 1.00
:
*
*
*
************************************************************************************/
/* Definition of RAM area */
char mode
= 0;
= 0;
= 1;
= 0;
= 1;
/* Mode number */
/* Input SW1 data */
/* Input SW1 Settlement data */
/* Input SW4 data */
/* Input SW4 Settlement data */
char sw1_bit
char fixsw1
char sw4_bit
char fixsw4
char md_buzzer;
char led_on;
/* Buzzer control mode */
/* Display on-off */
unsigned int tm_ledon;
unsigned int tm_buzzer;
unsigned long int cnt3min;
/* LED control timer */
/* Buzzer control timer */
/* Counting area in the 3 minute timer */
/* Declaration of function prototype */
extern void sfr_init(void);
extern void sfr_ref(void);
extern void port_out(void);
extern void port_in(void);
extern void stimer(void);
/* Initial setting of SFR registers */
/* Refresh of SFR registers */
/* Port output */
/* Port input */
/* Software timer */
/* Definition of base section */
#define SW_ON
#define SW_OFF
#define LOW
0
1
0
1
#define HIGH
/* Definition of port */
#define GREEN_LED2 p1_1
#define GREEN_LED1 p1_2
#define GREEN_LED0 p1_3
#define RED_LEDp1_4
#define SW1
#define SW4
#define BUZZER
p1_7
p4_5
p1_3
REJ05B0272-0200Z/Rev.2.00
July 2004
Page 12 of 21
R8C/Tiny Series
Sample Program: 3-Minute Timer
/************************************************************************************
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
File Name
Contents
: main.c
: definition of R8C/17 Group SFR
Copyright, 2004 RENESAS TECHNOLOGY CORPORATION
AND RENESAS SOLUTIONS CORPORATION
Version
note
: 1.00
:
************************************************************************************/
#include "sfr_r817.h"
#include "3min_timer.h"
/* Definition of the R8C/17 SFR */
/* Definition of processing for 3 minutes timer */
main(){
asm("FCLR I");
prcr = 1;
cm13 = 1;
cm15 = 1;
cm05 = 0;
cm16 = 0;
cm17 = 0;
cm06 = 0;
asm("nop");
asm("nop");
asm("nop");
asm("nop");
ocd2 = 0;
prcr = 0;
/* Interrupt disable */
/* Protect off */
/* X-in X-out */
/* XCIN-XCOUT drive capacity select bit : HIGH */
/* X-in on */
/* Main clock = No division mode */
/* CM16 and CM17 enable */
/* Main clock change */
/* Protect on */
sfr_init();
/* Initial setting of SFR registers */
while(1){
/* Main processing */
/* Interrupt enable */
/* Main cycle 10ms */
asm("FSET I");
while(ir_txic == 0){}
ir_txic = 0;
sfr_ref();
port_out();
port_in();
stimer();
/* Refreshment of SFR registers */
/* Port output */
/* Port input */
/* Software timer */
}
}
REJ05B0272-0200Z/Rev.2.00
July 2004
Page 13 of 21
R8C/Tiny Series
Sample Program: 3-Minute Timer
/************************************************************************************
Name: sfr_init
Parameters: None
Returns: None
Description: Initial setting of SFR registers
************************************************************************************/
void sfr_init(void){
/* Setting port registers */
p1 = 0x16;
/* p14,12,11 = H(Led 4.-.2.1) P13 = L(Buzzer) */
p4 = 0;
tcss = 0x11;
/* division = X:1/8,Z:1/8 */
/* Setting main cycle timer
/* 20MHz* 1/8 * 250 * 100 =10ms
prex = 250 - 1;
tx = 100 - 1;
txs = 1;
*/
*/
/* Setting Prescaler X register */
/* Setting timer X register */
/* Timer X count start flag = start */
/* Setting Buzzer output timer */
/* the period of Timer Z primary = 20MHz* 1/8 * 25 * 50 = 0.5ms */
/* the period of Timer Z secondary = 20MHz* 1/8 * 25 * 50 = 0.5ms */
prez = 25 - 1;
tzsc = 50 - 1;
tzpr = 50 - 1;
tzmr = 0x50;
pum = 0;
/* Setting Prescaler Z register */
/* Setting timer Z secondary register */
/* Setting timer Z Primary register */
/* Timer Z mode = Programmable waveform generation mode */
/* Timer Z waveform output control register */
/* Timer Z count start flag = stop */
tzs = 0;
sfr_ref();
/* Refreshment of SFR registers */
}
/************************************************************************************
Name: sfr_ref
Parameters: None
Returns: None
Description: Refresh of SFR registers
************************************************************************************/
void sfr_ref(void){
/* Setting port direction registers */
pd1 = 0x1E;
pd4 = 0x0;
}
REJ05B0272-0200Z/Rev.2.00
July 2004
Page 14 of 21
R8C/Tiny Series
Sample Program: 3-Minute Timer
/************************************************************************************
Name: port_out
Parameters: None
Returns: None
Description: Port output
************************************************************************************/
void port_out(void){
if (mode == 1){
/* LED output processing */
if (tm_ledon <= 0){
if (cnt3min > 12000){
/* The remainder time is more than 2 minutes */
led_on = 1;
}else{
if (cnt3min > 1000){
/* Change of LED control timer */
/* Display during 500ms */
tm_ledon = 50;
}else{
tm_ledon = 25;
/* Display during 250ms */
}
if (led_on == 0){
/* Change of display on-off */
/* Display start */
led_on = 1;
}else{
led_on = 0;
/* Display stoppage */
}
}
}
if (led_on == 1){
if (cnt3min > 6000){
/* The remainder time is more than 1 minutes */
/* The remainder time is less than 1 minutes */
/* The remainder time is nothing */
p1 = 0x10;
}else if (cnt3min > 0){
p1 = 0x12;
}else{
p1 = 0x06;
}
}else{
if (cnt3min == 0){
p1 = 0x06;
}else{
p1 = 0x16;
}
/* Counting end */
/* LED turn-off */
}
/* Buzzer output processing */
if (cnt3min == 0 && mode == 1){
if (tm_buzzer <= 0){
tm_buzzer = 20;
/* Buzzer control timer = 200ms */
/* Counting start of timer Z */
switch (md_buzzer){
case 0:
case 2:
tzs = 1;
md_buzzer = md_buzzer + 1;
break;
REJ05B0272-0200Z/Rev.2.00
July 2004
Page 15 of 21
R8C/Tiny Series
Sample Program: 3-Minute Timer
case 1:
case 3:
case 4:
tzs = 0;
/* Counting stoppage of timer Z */
md_buzzer = md_buzzer + 1;
break;
default:
mode = 0;
/* Move to the standby mode */
md_buzzer = 0;
}
}
}else{
tm_buzzer = 20;
/* Buzzer output of 200ms */
/* Timer Z stops Counting */
}
}else{
p1 = 0x06;
tzs = 0;
}
}
REJ05B0272-0200Z/Rev.2.00
July 2004
Page 16 of 21
R8C/Tiny Series
Sample Program: 3-Minute Timer
/************************************************************************************
Name: port_in
Parameters: None
Returns: None
Description: Port input
************************************************************************************/
void port_in(void){
unsigned char i;
/* Determination of input level SW4 */
i = 1;
if (SW4 == SW_ON)i = 0;
/* Now determination SW4 */
sw4_bit = sw4_bit << 1;
sw4_bit = sw4_bit | i;
sw4_bit = sw4_bit & 7;
/* Check pulses matching a trigger input level 3 times */
if (sw4_bit == 0 || sw4_bit == 7){
if (sw4_bit == 0){
/* Determinate input SW4 */
/* Input on */
fixsw4 = 0;
/* Counting start of the 3 minutes timer */
if (mode == 0){
mode = 1;
/* Setting the 3 minute timer mode */
/* Initialization of the 3 minutes timer */
/* Display start */
cnt3min = 18000;
led_on = 0;
}
}else{
fixsw4 = 1;
/* Input off */
}
}
/* Determination of input level SW1 */
i = 1;
if (SW1 == SW_ON)i = 0;
/* Now determination SW1 */
sw1_bit = sw1_bit << 1;
sw1_bit = sw1_bit | i;
sw1_bit = sw1_bit & 7;
/* Check pulses matching a trigger input level 3 times */
if (sw1_bit == 0 || sw1_bit == 7){
/* Determinate input SW1 */
/* Input on */
if (sw1_bit == 0){
fixsw1 = 0;
if (mode == 1){
mode = 0;
/* Setting the standby mode */
cnt3min = 0;
}
}else{
fixsw1 = 1;
/* Input off */
}
}
}
REJ05B0272-0200Z/Rev.2.00
July 2004
Page 17 of 21
R8C/Tiny Series
Sample Program: 3-Minute Timer
/************************************************************************************
Name: stimer
Parameters: None
Returns: None
Description: Software timer
************************************************************************************/
void stimer(void){
/* Countdown of 3 minutes timer */
if (mode == 1){
if (cnt3min != 0){
cnt3min = cnt3min - 1;
}
}
/* Countdown of LED control timer */
if (tm_ledon != 0){
tm_ledon = tm_ledon - 1;
}
/* Countdown of buzzer control timer */
if (tm_buzzer != 0){
tm_buzzer = tm_buzzer - 1;
}
}
REJ05B0272-0200Z/Rev.2.00
July 2004
Page 18 of 21
R8C/Tiny Series
Sample Program: 3-Minute Timer
6. Reference Documents
Datasheet
R8C/Tiny Series Datasheet
(For the most current version, please visit Renesas Technology Home Page )
Hardware Manual
R8C/Tiny Series Hardware Manual
(For the most current version, please visit Renesas Technology Home Page)
7. Home Page and Support Information Window
Renesas Technology Home Page
http://www.renesas.com/
M16C Family MCU Technical Support Information Window
support_apl@renesas.com
REJ05B0272-0200Z/Rev.2.00
July 2004
Page 19 of 21
R8C/Tiny Series
Sample Program: 3-Minute Timer
REVISION HISTORY
Description
Summary
Rev.
1.00
1.10
2.00
Date
Page
-
Sep 09, 2003
Nov 10, 2003
Jul 1, 2004
First edition issued
For R8C/11 Group
For R8C/Tiny Series
ALL
ALL
REJ05B0272-0200Z/Rev.2.00
July 2004
Page 20 of 21
R8C/Tiny Series
Sample Program: 3-Minute Timer
Keep safety first in your circuit designs!
Keep safety first in your circuit designs!
Notes regarding these materil
1. Renesas Technology Corporation puts the maximum effort into making semiconductor products
better and more reliable, but there is always the possibility that trouble may occur with them. Trouble
with semiconductors may lead to personal injury, fire or property damage.
Remember to give due consideration to safety when making your circuit designs, with appropriate
measures such as (i) placement of substitutive, auxiliary circuits, (ii) use of nonflammable material or
(iii) prevention against any malfunction or mishap.
Notes regarding these materials
1. These materials are intended as a reference to assist our customers in the selection of the Renesas
Technology Corporation product best suited to the customer's application; they do not convey any
license under any intellectual property rights, or any other rights, belonging to Renesas Technology
Corporation or a third party.
2. Renesas Technology Corporation assumes no responsibility for any damage, or infringement of any
third-party's rights, originating in the use of any product data, diagrams, charts, programs,
algorithms, or circuit application examples contained in these materials.
3. All information contained in these materials, including product data, diagrams, charts, programs and
algorithms represents information on products at the time of publication of these materials, and are
subject to change by Renesas Technology Corporation without notice due to product improvements
or other reasons. It is therefore recommended that customers contact Renesas Technology
Corporation or an authorized Renesas Technology Corporation product distributor for the latest
product information before purchasing a product listed herein.
The information described here may contain technical inaccuracies or typographical errors.
Renesas Technology Corporation assumes no responsibility for any damage, liability, or other loss
rising from these inaccuracies or errors.
Please also pay attention to information published by Renesas Technology Corporation by various
means, including the Renesas Technology Corporation Semiconductor home page
(http://www.renesas.com).
4. When using any or all of the information contained in these materials, including product data,
diagrams, charts, programs, and algorithms, please be sure to evaluate all information as a total
system before making a final decision on the applicability of the information and products. Renesas
Technology Corporation assumes no responsibility for any damage, liability or other loss resulting
from the information contained herein.
5. Renesas Technology Corporation semiconductors are not designed or manufactured for use in a
device or system that is used under circumstances in which human life is potentially at stake.
Please contact Renesas Technology Corporation or an authorized Renesas Technology Corporation
product distributor when considering the use of a product contained herein for any specific
purposes, such as apparatus or systems for transportation, vehicular, medical, aerospace, nuclear,
or undersea repeater use.
6. The prior written approval of Renesas Technology Corporation is necessary to reprint or reproduce
in whole or in part these materials.
7. If these products or technologies are subject to the Japanese export control restrictions, they must
be exported under a license from the Japanese government and cannot be imported into a country
other than the approved destination.
Any diversion or reexport contrary to the export control laws and regulations of Japan and/or the
country of destination is prohibited.
8. Please contact Renesas Technology Corporation for further details on these materials or the
products contained therein.
REJ05B0272-0200Z/Rev.2.00
July 2004
Page 21 of 21
相关型号：
©2020 ICPDF网 联系我们和版权申明