ez80l92 ZiLOG Semiconductor, ez80l92 Datasheet - Page 82

• Manufacturer Part Number: ez80l92
• Description: Ez80acclaim Flash Microcontrollers
• Manufacturer: ZiLOG Semiconductor

PS013014-0107
Watchdog Timer Reset Register
The Watchdog Timer Reset register, described in
The Watchdog Timer is reset when an
register. Any amount of time can occur between the writing of the
value, so long as the WDT time-out does not occur prior to completion.
Table 28. Watchdog Timer Reset Register (WDT_RR = 0094h)
Bit
Position
[1:0]
WDT_PERIOD
Note: *RST_FLAG is only cleared by a non-WDT RESET.
Bit
Reset
CPU Access
Note: X = Undefined; W = Write only.
Bit
Position
[7:0]
WDT_RR
00
01
10
11
Value
Value
A5h
5Ah
W
X
7
Description
WDT time-out period is 2
WDT time-out period is 2
WDT time-out period is 2
WDT time-out period is 2
Description
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
6
A5h
value followed by
W
X
5
Table
W
X
4
27
25
22
18
28, is an 8-bit Write-Only register.
clock cycles.
clock cycles.
clock cycles.
clock cycles.
W
X
3
5Ah
Product Specification
is written to this
A5h
W
X
2
value and the
eZ80L92 MCU
Watchdog Timer
W
X
1
W
5Ah
X
0
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