Z8F1680SH020SG Datasheet, PDF (168/412 Pages) Zilog, Inc. – High-Performance 8-Bit Microcontrollers

Z8 Encore! XP^® F1680 Series
Product Specification
143
Bit
Field
Reset
R/W
Address
11.2.1. Watchdog Timer Reload High and Low Byte
Registers
The Watchdog Timer Reload High and Low Byte (WDTH, WDTL) registers, shown in
Tables 81 and 82, form the 16-bit reload value that is loaded into the Watchdog Timer
when a WDT instruction executes; this 16-bit reload value is {WDTH[7:0], WDTL[7:0]}.
Writing to these registers following the unlock sequence sets the appropriate reload value.
Reading from these registers returns the current WDT count value.
Table 81. Watchdog Timer Reload High Byte Register (WDTH = FF2H)
7
6
5
4
3
2
1
0
WDTH
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
FF2H
Bit
7
Field
Reset
0
R/W
R/W
Address
Table 82. Watchdog Timer Reload Low Byte Register
6
5
4
3
2
WDTL
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
FF3H
(WDTL = FF3H)
1
0
0
0
R/W
R/W
Bit
[7:0]
WDTH,
WDTL
Description
Watchdog Timer Reload High and Low Bytes
WDTH: The WDT Reload High Byte is the most significant byte, or bits [15:8] of the 16-bit WDT
reload value.
WDTL: The WDT Reload Low Byte is the least significant byte, or bits [7:0] of the 16-bit WDT
reload value.
PS025015-1212
PRELIMINARY
Watchdog Timer