參數(shù)資料
型號: M30302MAL-XXXFP
元件分類: 微控制器/微處理器
英文描述: 16-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP100
封裝: 14 X 20 MM, 0.65 MM PITCH, PLASTIC, QFP-100
文件頁數(shù): 134/168頁
文件大小: 2424K
代理商: M30302MAL-XXXFP
Watchdog Timer
65
Mitsubishi microcomputers
M16C / 30L Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Watchdog timer control register
Symbol
Address
When reset
WDC
000F16
000XXXXX2
Function
Bit symbol
W
R
b7
b6
b5
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
Address
When reset
WDTS
000E16
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 “7FFF16
regardless of whatever value is written.
Reserved bit
Must always be set to “0”
0
Figure 1.12.2. Watchdog timer control and start registers
Figure 1.12.1. Block diagram of watchdog timer
BCLK
Write to the watchdog timer
start register
(address 000E16)
RESET
“PM12 = 0”
Watchdog timer
Set to
“7FFF16
1/128
1/16
“CM07 = 0”
“WDC7 = 1”
“CM07 = 0”
“WDC7 = 0”
“CM07 = 1”
HOLD
1/2
Prescaler
“PM12 = 1”
Watchdog timer
interrupt request
Reset
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