Holtek HT827A0 Manual page 36

DECA [m] Decrement data memory place result in the accumulator
Description Data in the specified data memory are decremented by one, leaving the re-
sult in the accumulator. The contents of the data memory remain un-
changed.
Operation
ACC ¬ [m]-1
Affected flag(s)
TC2
¾
HALT Enter power down mode
Description This instruction stops the program execution and turns off the system clock.
The contents of the RAM and registers are retained. The WDT and prescaler
are cleared. The power down bit (PD) is set and the WDT time-out bit (TO) is
cleared.
Operation
PC ¬ PC+1
PD ¬ 1
TO ¬ 0
Affected flag(s)
TC2
¾
INC [m] Increment data memory
Description Data in the specified data memory are incremented by one.
Operation [m] ¬ [m]+1
Affected flag(s)
TC2
¾
INCA [m] Increment data memory-place result in accumulator
Description Data in the specified data memory are incremented by one, leaving the re-
sult in the accumulator. The contents of the data memory remain un-
changed.
Operation ACC ¬ [m]+1
Affected flag(s)
TC2
¾
TC1 TO PD OV
¾ ¾ ¾ ¾
TC1 TO PD OV
0 1
¾ ¾
TC1 TO PD OV
¾ ¾ ¾ ¾
TC1 TO PD OV
¾ ¾ ¾ ¾
36
HT827A0
Z AC C
Ö ¾ ¾
Z AC C
¾ ¾ ¾
Z AC C
Ö ¾ ¾
Z AC C
Ö ¾ ¾
March 15, 2000