HD6433935 Hitachi, HD6433935 Datasheet - Page 248
HD6433935
Manufacturer Part Number
HD6433935
Description
8-Bit MICROCONTROLLER
Manufacturer
Hitachi
Datasheet
1.HD6433935.pdf
(521 pages)
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Bit 2: Watchdog timer on (WDON)
Bit 2 enables watchdog timer operation.
Bit 2
WDON
0
1
Counting starts when this bit is set to 1, and stops when this bit is cleared to 0.
Bit 1: Bit 0 write inhibit (B0WI)
Bit 1 controls the writing of data to bit 0 in TCSRW.
Bit 1
B0WI
0
1
This bit is always read as 1. Data written to this bit is not stored.
Bit 0: Watchdog timer reset (WRST)
Bit 0 indicates that TCW has overflowed, generating an internal reset signal. The internal reset
signal generated by the overflow resets the entire chip. WRST is cleared to 0 by a reset from the
RES pin, or when software writes 0.
Bit 0
WRST
0
1
236
Description
Watchdog timer operation is disabled
Clearing conditions:
Reset, or when TCSRWE = 1 and 0 is written in both B2WI and
WDON
Watchdog timer operation is enabled
Setting conditions:
When TCSRWE = 1 and 0 is written in B2WI and 1 is written in
WDON
Description
Bit 0 is write-enabled
Bit 0 is write-protected
Description
Clearing conditions:
Reset by RES pin
When TCSRWE = 1, and 0 is written in both B0WI and WRST
Setting conditions:
When TCW overflows and an internal reset signal is generated
(initial value)
(initial value)
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