M306V5ME-XXXSP Datasheet, PDF (58/263 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER

MITSUBISHI MICROCOMPUTERS
M306V5ME-XXXSP
M306V5EESP
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
BCLK
HOLD
Write to the watchdog timer
start register
(address 000E 16)
RESET
Prescaler
“WDC7 = 0”
1/16
“WDC7 = 1”
1/128
Watchdog timer
Set to
“7FFF16”
Watchdog timer
interrupt request
Figure 2.8.1 Block diagram of watchdog timer
Watchdog timer control register
b7 b6 b5 b4 b3 b2 b1 b0
00
Symbol
WDC
Address
000F16
Bit symbol
Bit name
High-order bit of watchdog timer
Reserved bits
WDC7
Prescaler select bit
When reset
000?????2
Function
Must always be set to “0”
0 : Divided by 16
1 : Divided by 128
RW
Figure 2.8.2 Watchdog timer control register
Watchdog timer start register
b7
b0
Symbol
WDTS
Address
000E16
When reset
Indeterminate
Function
RW
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.
Figure 2.8.3 Watchdog timer start register
Rev. 1.0
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