參數(shù)資料
型號: M30240F9-XXXFP
廠商: Mitsubishi Electric Corporation
英文描述: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
中文描述: 單片16位CMOS微機(jī)
文件頁數(shù): 40/142頁
文件大?。?/td> 1637K
代理商: M30240F9-XXXFP
1-40
Mitsubishi microcomputers
M30240 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Preliminary Specifications REV. E
Specifications in this manual are tentative and subject to change
Watchdog Timer
Figure 1.21: Block diagram of watchdog timer
Figure 1.22: Watchdog timer control and start registers
1/16
1/128
Watchdog timer
Watchdog timer
interrupt request
Set to 7FFF
16
WDC7 = 0
WDC7 = 1
RESET
Write to the watchdog
timer start register
(address 000E
16
)
Internal clock
Φ
Watchdog timer control register
Symbol
WDC
Address
000F
16
When reset
000XXXXX
2
Function
Bit symbol
b7
b6
0
b5
0
b4
b3
b2
b1
b0
High-order bit of watchdog timer
WDC7
Bit name
Prescaler select bit
0 : Divided by 16
1 : Divided by 128
Watchdog timer start register
Symbol
WDTS
Address
000E
16
When reset
Indeterminate
W
R
A
b7
b0
Function
The watchdog timer is initialized and starts counting after a write instruction to
this register. The watchdog timer value is always initialized to 7FFF
16
regardless of whatever value is written.
Reserved bit
Reserved bit
Must always be set to 0
Must always be set to 0
AA
AA
AA
AA
AA
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