ez80f91 ZiLOG Semiconductor, ez80f91 Datasheet - Page 128

• Manufacturer Part Number: ez80f91
• Description: Ez80 Acclaimplus!? Connectivity Assp Ez80f91 Assp
• Manufacturer: ZiLOG Semiconductor

PS027001-0707
Watchdog Timer Reset Register
The WDT Reset register (see
when an
occurs between the writing of
does not occur prior to completion. Any value other than
register after the
the timer to be reset.
Table 49. Watchdog Timer Reset Register
Bit
Reset
CPU Access
Note: X = Undefined; W = Write Only.
Bit
Position
[7:0]
WDT_RR
A5h
value followed by a
A5h
Value Description
A5h
5Ah
value requires that the sequence of Writes (
The first Write value required to reset the WDT prior to a time-
out.
The second Write value required to reset the WDT prior to a
time-out. If an A5h, 5Ah sequence is written to WDT_RR, the
WDT timer is reset to its initial count value and counting
resumes.
W
X
7
Table 49
A5h
5Ah
value and the
W
X
6
value is written to this register. Any amount of time
) is an 8-bit Write only register. The WDT is reset
W
X
5
5Ah
(WDT_RR = 0094h)
W
X
4
value, so long as the WDT time-out
5Ah
W
X
3
written to the WDT Reset
A5h
Product Specification
,
W
X
5Ah
2
eZ80F91 ASSP
) be restarted for
Watchdog Timer
W
X
1
W
X
0
120