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6V7 Datasheet(PDF) 69 Page - Renesas Technology Corp

Part # 6V7
Description  SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
PDF  298 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

6V7 Datasheet(HTML) 69 Page - Renesas Technology Corp

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Rev.1.00
May 18, 2004
page 69 of 296
M306V7MG/MH/MJ/MJA-XXXFP, M306V7FG/FH/FJ/FJAFP
Figure 2.8.3 Watchdog timer start register
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 “7FFF 16”
regardless of whatever value is written.
BCLK
Write to the watchdog timer
start register
(address 000E 16)
RESET
Watchdog timer
interrupt request
Watchdog timer
Set to
“7FFF16”
1/128
1/16
“CM07 = 0”
“WDC7 = 1”
“CM07 = 0”
“WDC7 = 0”
“CM07 = 1”
HOLD
1/2
Prescaler
Figure 2.8.1 Block diagram of watchdog timer
Figure 2.8.2 Watchdog timer control register
Watchdog timer control register
Symbol
Address
When reset
WDC
000F16
000?????2
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
Reserved bits
Must always be set to “0”
0
0



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