M166 Datasheet, PDF (62/127 Pages) Siemens Semiconductor Group – C16x Family of Siemens 16-Bit CMOS Single-Chip Microcontrollers

30Mar98@15:00h
C166 Family Instruction Set
Instruction Description
DISWDT
Disable Watchdog Timer
DISWDT
Syntax
Operation
Description
DISWDT
Disable the watchdog timer
This instruction disables the watchdog timer. The watchdog timer is ena-
bled by a reset. The DISWDT instruction allows the watchdog timer to be
disabled for applications which do not require a watchdog function. Fol-
lowing a reset, this instruction can be executed at any time until either a
Service Watchdog Timer instruction (SRVWDT) or an End of Initialization
instruction (EINIT) are executed. Once one of these instructions has been
executed, the DISWDT instruction will have no effect. To insure that this
instruction is not accidentally executed, it is implemented as a protected
instruction.
Condition Flags
E
Z
V
C
N
-
-
-
-
-
Addressing Modes
E Not affected.
Z Not affected.
V Not affected.
C Not affected.
N Not affected.
Mnemonic
DISWDT
Format
A5 5A A5 A5
Bytes
4
Semiconductor Group
62
Version 1.2, 12.97