w83l950d Winbond Electronics Corp America, w83l950d Datasheet - Page 75
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w83l950d
Manufacturer Part Number
w83l950d
Description
Peripheral Personal Computer Keyboard Controller
Manufacturer
Winbond Electronics Corp America
Datasheet
1.W83L950D.pdf
(105 pages)
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17.4. IDLE Mode Disable Bit
17.5. Watchdog timer control register (WDTCON)
RESET
Main clock division
ratio selection bits
(Note)
Bit 6 of the watchdog timer control register (WDTCON) permits disabling the IDLE mode when
the watchdog timer is in operation. When this bit is "0”, the IDLE bit of PCON can be written to
“1”. When this bit is "1', the IDLE mode is disabled. When this bit is set to “1", it cannot be
rewritten to "0" by program, this bit is cleared to '0" after reset.
SFR address
Default value
Bit 7: Watchdog timer H count source selection bit
Bit 6: Watchdog timer IDLE mode disable bit
Bit 5 – 0: Watchdog timer H
X
X
IN
CIN
0: Watchdog timer L underflow.
1: f (XIN)/16 or f(Xcin)/16.
0: Enable IDLE mode when watchdog timer running.
1: Disable IDLE mode when watchdog timer running.
(For read-out of high-order 6 bit)
“10”
“00”
“01”
“FF
watchdog
control register is
written to
0xCE
0011,1111b
16
1/16
” is set when
Fig.17.1 Watchdog Timer Block Diagram
timer
Watchdog timer L (8)
- 66 -
“1”
“0”
Watchdog timer H count
source selection bit
Watchdog timer H (B)
Reset
circuit
W83L950D
Internal reset
“FF
watchdog
control register is
written to
Data bus
16
” is set when
timer
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