EZ80F91MCU ZILOG [Zilog, Inc.], EZ80F91MCU Datasheet - Page 145

• Manufacturer Part Number: EZ80F91MCU
• Description: eZ80Acclaim-TM Flash Microcontrollers
• Manufacturer: ZILOG [Zilog, Inc.]

PS019209-0504
Watch-Dog Timer Reset Register
The Watch-Dog Timer Reset register, detailed in Table 49, is an 8-bit Write Only
register. The Watch-Dog Timer is reset when an
is written to this register. Any amount of time can occur between the writing of the
A5h
completion. Any value other than
ter after the
for the timer to be reset.
Table 49. Watch-Dog Timer Reset Register
(WDT_RR = 0094h)
Bit
Reset
CPU Access
Note: X = Undefined; W = Write Only.
Bit
Position
[7:0]
WDT_RR
value and the
A5h
value requires that the sequence of Writes (
Value Description
A5h
5Ah
5Ah
value, so long as the WDT time-out does not occur prior to
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
P R E L I M I N A R Y
X
7
W
6
X
5Ah
written to the Watch-Dog Timer Reset regis-
W
X
5
W
X
A5h
4
value followed by a
W
X
3
Product Specification
A5h
W
X
2
,
5Ah
eZ80F91 MCU
Watch-Dog Timer
) be restarted
W
X
1
5Ah
value
W
X
0
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