參數(shù)資料
型號: UPD784224GK
廠商: NEC Corp.
英文描述: 16/8-BIT SINGLE-CHIP MICROCONTROLLERS
中文描述: 16/8-BIT單晶片微控制器
文件頁數(shù): 45/92頁
文件大?。?/td> 687K
代理商: UPD784224GK
45
μ
PD784224, 784225, 784224Y, 784225Y
Data Sheet U12376EJ1V0DS00
Figure 7-16. Block Diagram of Watch Timer
f
XX
/2
7
Prescaler
f
XT
f
W
2
4
f
W
2
5
f
W
2
6
f
W
2
7
f
W
2
8
f
W
f
W
2
9
5-bit counter
f
W
2
5
f
W
2
14
INTWT
INTTM3
To 16-bit timer/counter
S
S
S
S
7.12 Watchdog Timer
A watchdog timer is provided to detect a hang up of the CPU. This watchdog timer generates a non-maskable
or maskable interrupt unless it is cleared by software within a specified interval time. Once enabled to operate, the
watchdog timer cannot be stopped by software. Whether the interrupt by the watchdog timer or the interrupt input
from the NMI pin takes precedence can be specified.
Figure 7-17. Block Diagram of Watchdog Timer
S
f
CLK
/2
21
f
CLK
/2
20
f
CLK
/2
19
f
CLK
/2
17
f
CLK
Timer
INTWDT
RUN
Note
HALT
IDLE
STOP
Note
Write 1 to bit 7 (RUN) of the watchdog timer (WDM).
Remark
f
CLK
: Internal system clock (f
XX
to f
XX
/8)
相關(guān)PDF資料
PDF描述
UPD784224Y 16/8-BIT SINGLE-CHIP MICROCONTROLLERS
UPD784225 16/8-BIT SINGLE-CHIP MICROCONTROLLERS
UPD784225Y 16/8-BIT SINGLE-CHIP MICROCONTROLLERS
UPD784224YGK 16/8-BIT SINGLE-CHIP MICROCONTROLLERS
UPD78C10AGF-3BE MS27467T25B61P
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