參數(shù)資料
型號(hào)： M30100
廠商： Renesas Technology Corp.
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)： 59/164頁
文件大?。?/td> 3302K
代理商： M30100
deveopment
Watchdog Timer
Tentative Specifications REV.E1
Specifications in this manual are tentative and subject to change.
Mitsubishi microcomputers
M30100/M30102 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
58
Watchdog timer control register
Symbol
WDC
Address
000F
16
When reset
000XXXXX
2
Function
Bit symbol
W
R
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
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
A
Figure 1.13.2. Watchdog timer control and start registers
Processor mode register 1 (Note 1)
Symbol
PM1
Address
0005
16
When reset
00XXX0X0
2
Bit name
Function
Bit symbol
W
R
b7
0
b6 b5
0
b4
b3
b2
b1
b0
0
Nothing is assigned.
In an attempt to write to this bits, write “0”. The value, if read, turns
out to be
indeterminate.
Reserved bit
Must always be set to “0”
Note 1: Set bit 1 of the protect register (address 000A
16
) to “1” when writing new
values to this register.
Note 2: After setting this bit to "1", can not change to "0" by software.
AA
PM12
WDT interrupt/reset
switching bit
0 : Watchdog timer interrupt
1 : Reset (Note 2)
AA
Nothing is assigned.
In an attempt to write to these bits, write “0”. The value, if read, turns
out to be
indeterminate.
Reserved bit
Must always be set to “0”
A
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