參數(shù)資料
型號: MB90T673
廠商: Fujitsu Limited
英文描述: Quadruple Bus Buffer Gates With 3- State Outputs 14-CDIP -55 to 125
中文描述: 16位微控制器專有
文件頁數(shù): 46/124頁
文件大小: 2584K
代理商: MB90T673
MB90670/675 Series
46
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
XXXXX111
B
HCLK: Oscillation clock
PONR STBR WRST ERST SRST WTE
WT1
WT0
Watchdog timer control register (WDTC)
Start sleep mode
Start hold status
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
Start stop mode
相關(guān)PDF資料
PDF描述
MB90T673PF 16-Bit Buffers/Drivers With 3-State Outputs 48-CFP -55 to 125
MB90678 16-bit Proprietary Microcontroller
MB90T673PFV 16-Bit Bus Transceivers With 3-State Outputs 48-CFP -55 to 125
MB90T678PF 16-BIT BUFFERS/DRIVERS WITH 3-STATE OUTPUTS 48-CFP -55 to 125
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