參數(shù)資料
型號: MB90F372PMT-G
廠商: Fujitsu Limited
英文描述: 16-bit Proprietary Microcontroller
中文描述: 16位微控制器專有
文件頁數(shù): 51/153頁
文件大?。?/td> 1573K
代理商: MB90F372PMT-G
MB90370 Series
51
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
(1) Register configuration of watchdog timer
(2) Block diagram of watchdog timer
Address: 0000A8
H
7
6
5
4
3
2
1
0
Watchdog Timer Control Register
WDTC
Bit number
R
X
R
X
R
X
R
X
W
1
W
1
W
1
Initial value
Read/write
PONR
WRST
ERST
SRST
WTE
WT1
WT0
PONR
WRST ERST SRST WTE WT1
WT0
Watchdog timer control register (WDTC)
X2
1
X2
2
X2
8
X2
9
X2
10
X2
11
X2
13
X2
12
X2
15
X2
14
Counter
clear control
circuit
Count
clock
selector
2-bit
counter
Watchdog
reset
generat
or
X2
1
X2
2
X2
10
X2
11
X2
13
X2
12
X2
15
X2
14
...
.........
HCLK: Oscillation clock
One-half of HCLK
(Timebase timer counter)
Watch timer counter
Sub-clock divide by 4
CLK
Watchdog timer
CLR
Activation with CLR
Overflow
To the
internal
reset
generator
WDCS (from watch timer
control register, WTC)
2
Start of watch mode
Start of sleep mode
Start of stop mode
reset generation
X2
16
X2
17
X2
18
4
4
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MB90F372 16-bit Proprietary Microcontroller
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