參數(shù)資料
型號: μPD784217
廠商: NEC Corp.
英文描述: 8 /16 Bit Single Chip Microcontrollers(8/16位單片微控制器)
中文描述: 8 / 16位單片機微控制器(8 / 16位單片微控制器)
文件頁數(shù): 45/70頁
文件大小: 271K
代理商: ΜPD784217
μ
PD784217,784218
45
Figure 8-15. 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
8.12 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 8-16. Block Diagram of Watchdog Timer
f
CLK
/2
21
f
CLK
/2
20
f
CLK
/2
19
f
CLK
/2
17
f
CLK
Clear signal
Timer
INTWDT
S
Remark
f
CLK
: Internal system clock (f
XX
to f
XX
/8)
相關PDF資料
PDF描述
μPD784928Y 16 Bit Single Chip Microcontrollers(16 位單片微控制器)
μPD784915A 16 Bit Single Chip Microcontrollers(16 位單片微控制器)
μPD784916A 16 Bit Single Chip Microcontrollers(16 位單片微控制器)
μPD784907 16 Bit Single Chip Microcontrollers(16 位單片微控制器)
μPD784908 16 Bit Single Chip Microcontrollers(16 位單片微控制器)
相關代理商/技術參數(shù)
參數(shù)描述
PD784976A 制造商:NEC 制造商全稱:NEC 功能描述:16-Bit Single-Chip Microcontroller
PD7869 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Optoelectronic
PD78F0134 制造商:NEC 制造商全稱:NEC 功能描述:8-Bit Single-Chip Microcontrollers
PD78F0134(A) 制造商:NEC 制造商全稱:NEC 功能描述:8-Bit Single-Chip Microcontrollers
PD78F0134(A1) 制造商:NEC 制造商全稱:NEC 功能描述:8-Bit Single-Chip Microcontrollers