參數(shù)資料
型號(hào): MB90F462PF
廠商: FUJITSU LTD
元件分類: 微控制器/微處理器
英文描述: 16-bit Proprietary Microcontroller
中文描述: 16-BIT, FLASH, 16 MHz, MICROCONTROLLER, PQFP64
封裝: 14 X 20 MM, 3.35 MM HEIGHT, 1 MM PITCH, PLASTIC, QFP-64
文件頁數(shù): 37/85頁
文件大小: 827K
代理商: MB90F462PF
MB90460 Series
37
4.
Watchdog Timer
The watchdog timer is a 2-bit counter that uses the timebase timer’s supply clock as the count clock. After
activation, if the watchdog timer is not cleared within a given period, the CPU will be reset.
Features of Watchdog Timer :
Reset CPU at four different time intervals
Status bits to indicate the reset causes
Block Diagram
PONR STBR WRST ERST SRST WTE
WT1
WT0
×
2
1
×
2
2
×
2
8
×
2
9
×
2
10
×
2
11
×
2
12
×
2
13
×
2
14
×
2
15
×
2
16
×
2
17
×
2
18
2
4
Counter
clear control
circuit
Count
clock
selector
2-bit
counter
Watchdog
reset generator
One-half of HCLK
Watchdog timer control register (WDTC)
Watchdog timer
Activation
with CLR
To the
internal
reset
generator
CLR
CLR
Clear
(Timebase timer counter)
Over-
flow
Start of sleep mode
Start of hold status mode
Start of stop mode
HCLK : Oscillation clock
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