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M306V2EEFS датащи(PDF) 68 Page - Renesas Technology Corp

номер детали M306V2EEFS
подробное описание детали  SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
PDF  271 Pages
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производитель  RENESAS [Renesas Technology Corp]
домашняя страница  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

M306V2EEFS датащи(HTML) 68 Page - Renesas Technology Corp

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Rev.1.40
Oct 06, 2004 page 68 of 269
M306V2ME-XXXFP, M306V2EEFP
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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