HT49R50 Holtek Semiconductor Inc, HT49R50 Datasheet - Page 38

• Manufacturer Part Number: HT49R50
• Description: 8-Bit Microcontroller
• Manufacturer: Holtek Semiconductor Inc

CLR WDT1
Description
Operation
Affected flag(s)
CLR WDT2
Description
Operation
Affected flag(s)
CPL [m]
Description
Operation
Affected flag(s)
Preclear watchdog timer
The TD, PD flags and WDT are all cleared (re-counting from zero), if the
other preclear WDT instruction has been executed. Only execution of this in-
struction without the other preclear instruction sets the indicated flag which
implies that this instruction has been executed and the TO and PD flags re-
main unchanged.
WDT ¬ 00H*
PD and TO ¬ 0*
Preclear watchdog timer
The TO, PD flags and WDT are all cleared (re-counting from zero), if the
other preclear WDT instruction has been executed. Only execution of this in-
struction without the other preclear instruction sets the indicated flag which
implies that this instruction has been executed and the TO and PD flags re-
main unchanged.
WDT ¬ 00H*
PD and TO ¬ 0*
Complement data memory
Each bit of the specified data memory is logically complemented (1¢s comple-
ment). Bits which previously contained a one are changed to zero and
vice-versa.
[m] ¬ [m]
TC2
TC2
TC2
¾
¾
¾
TC1
TC1
TC1
¾
¾
¾
TO
TO
TO
0*
0*
¾
PD
PD
PD
0*
0*
¾
38
OV
OV
OV
¾
¾
¾
¾
¾
Z
Z
Z
Ö
AC
AC
AC
¾
¾
¾
¾
¾
¾
C
C
C
August 18, 1999
HT49C50