z8f0813 ZiLOG Semiconductor, z8f0813 Datasheet - Page 100
z8f0813
Manufacturer Part Number
z8f0813
Description
High-performance 8-bit Microcontrollers
Manufacturer
ZiLOG Semiconductor
Datasheet
1.Z8F0813.pdf
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Table 58. Watchdog Timer Control Register (WDTCTL)
BITS
FIELD
RESET
R/W
ADDR
PS024314-0308
Caution:
Watchdog Timer Reload Upper, High and Low Byte Registers
W
7
X
Watchdog Timer Reload Byte registers (WDTU, WDTH, and WDTL) to allow changes to
the time-out period. These write operations to the WDTCTL register address produce no
effect on the bits in the WDTCTL register. The locking mechanism prevents spurious
writes to the Reload registers.
This register address is shared with the read-only Reset Status Register.
WDTUNLK—Watchdog Timer Unlock
The software must write the correct unlocking sequence to this register before it is allowed
to modify the contents of the Watchdog Timer reload registers.
The Watchdog Timer Reload Upper, High and Low Byte (WDTU, WDTH, WDTL)
registers
Watchdog Timer when a
{WDTU[7:0], WDTH[7:0], WDTL[7:0]}. Writing to these registers sets the appropriate
Reload Value. Reading from these registers returns the current Watchdog Timer count
value.
The 24-bit WDT Reload Value must not be set to a value less than
(Tables 59
W
X
6
through
W
X
5
WDT
Table
instruction executes. The 24-bit reload value is
61) form the 24-bit reload value that is loaded into the
W
X
4
WDTUNLK
FF0H
W
X
3
Z8 Encore! XP
W
X
2
Product Specification
000004H
W
X
1
®
F0823 Series
Watchdog Timer
.
W
X
0
90
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