参数资料
型号: MB90246APFV
厂商: FUJITSU LTD
元件分类: 微控制器/微处理器
英文描述: 16-bit Proprietary Microcontroller
中文描述: 16-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP100
封装: PLASTIC, LQFP-100
文件页数: 33/100页
文件大小: 1956K
代理商: MB90246APFV
33
MB90246A Series
3. Watchdog Timer
The watchdog timer is a 2-bit counter operating with an output of the timebase timer and resets the CPU when
the counter is not cleared for a preset period of time.
(1) Register Configuration
(2) Block Diagram
Watchdog timer control register (WDTC)
Address
0000A8
H
bit 15 . . . . . . . . . . . .
PONR STBR WRST ERST
SRST
WTE
WT1
WT0
(TBTC)
R : Read only
W: Write only
X : Indeterminate
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
R
R
R
R
R
W
W
W
Initial value
XXXXXXXX
B
HCLK: Oscillation clock
PONR STBR WRST ERST SRST WTE
WT1
WT0
Watchdog timer control register (WDTC)
Start sleep mode
Start hold status
Start stop mode
CLR and start
Watchdog timer
Overflow
To internal reset
generation circuit
Counter clear
control circuit
Count clock
selector
2-bit
counter
Watchdog reset
generation circuit
Clear
Divided-by-2
of HCLK
(Timebase timer counter)
×
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
CLR
2
4
CLR
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