參數(shù)資料
型號: MB90F488B
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): 66/120頁
文件大小: 1241K
代理商: MB90F488B
MB90480/485 Series
66
14. Watchdog timer
The watchdog timer is a 2-bit counter that uses the output from the timebase timer or watch timer as a count
clock signal, and will reset the CPU if not cleared within a predetermined time interval after it is activated.
(1) Register List
(2) Block Diagram
Watchdog timer control register (WDTC)
0000A8
H
Read/write
Initial value
X
R
X
R
X
R
X
W
1
W
1
W
1
7
6
5
4
3
2
1
0
R
X
PONR
WRST
ERST
SRST
WTE
WT1
WT0
Reserved
PONR
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
1
SCLK
CLR
CLR
×
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
4
Watchdog timer control register (WDTC)
Watchdog timer
Watch mode start
Timebase timer
mode start
Sleep mode start
Hold status start
Counter
clear
control
circuit
Count
clock
selector
2-bit
counter
Watchdog
reset
generator
circuit
Clear
Internal
reset
generator
circuit
CLR and
start
Time-base counter
HCLK
×
2
HCLK : Oscillator clock
SCLK : Sub clock
Watch timer control
register (WTO)
WDCS bit
Clock select register
(CKSCR)
SCM bit
Stop mode
start
Re-
served
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