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参数资料
| 型号： | M34519M8-XXXFP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PDSO42 |
| 封装： | 0.450 INCH, 0.80 MM PITCH, PLASTIC, SSOP-42 |
| 文件页数： | 112/138页 |
| 文件大小： | 1146K |
| 代理商： | M34519M8-XXXFP |
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4519 Group
Rev.3.01
2005.06.15
page 73 of 160
REJ03B0007-0301
12
Watchdog timer
The watchdog timer function is valid after system is released
from reset. When not using the watchdog timer function, execute
the DWDT instruction and the WRST instruction continuously,
and clear the WEF flag to “0” to stop the watchdog timer function.
The watchdog timer function is valid after system is returned from
the RAM back-up state. When not using the watchdog timer func-
tion, execute the DWDT instruction and the WRST instruction
continuously every system is returned from the RAM back-up
state, and stop the watchdog timer function.
When the watchdog timer function and RAM back-up function are
used at the same time, execute the WRST instruction before sys-
tem enters into the RAM back-up state and initialize the flag
WDF1.
Timer 4 count start timing and count time when operation starts
Count starts from the rising edge (2) after the first falling edge of
the count source, after Timer 4 operations start (1).
Time to first underflow (3) is different from time among next un-
derflow (4) by the timing to start the timer and count source
operations after count starts.
Fig. 64 Timer count start timing and count time when opera-
tion starts (Timer 4)
(1) Timer Start
Count Source
Timer Value
Timer Underflow Signal
3
2
1
032
103
(4)
(3)
(2)
14
Fig. 63 Timer count start timing and count time when opera-
tion starts (Prescaler, Timer 1, Timer 2 and Timer 3)
(1) Timer Start
Count Source
Timer value
Timer Underflow signal
3
2
1
032
103
(4)
(3)
(2)
2
Prescaler, Timer 1, Timer 2 and Timer 3 count start timing and
count time when operation starts
Count starts from the first rising edge of the count source (2) af-
ter Prescaler, Timer 1, Timer 2 and Timer 3 operations start (1).
Time to first underflow (3) is shorter (for up to 1 period of the
count source) than time among next underflow (4) by the timing
to start the timer and count source operations after count starts.
13
相关PDF资料 |
PDF描述 |
|---|---|
| M34519M6-XXXFP | 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PDSO42 |
| M34553M8H-XXXFP | 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PQFP48 |
| M34553M4-XXXFP | 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PQFP48 |
| M34553G8HFP | 4-BIT, OTPROM, 6 MHz, MICROCONTROLLER, PQFP48 |
| M34553M4H-XXXFP | 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PQFP48 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| M34-52 | 制造商:GAMEWELL-FCI 制造商全称:GAMEWELL-FCI 功能描述:Three-Fold Fire Alarm Boxes and Transmitters |
| M34524EDFP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34524M8-XXXFP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34524MC-XXXFP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:4-BIT CISC SINGLE-CHIP MICROCOMPUTER 720 FAMILY / 4500 SERIES |
| M3452-C09K1 | 制造商:Bonitron 功能描述:OVERVOLTAGE BRAKING TRANSISTOR |
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