HT49R50 Datasheet, PDF (34/59 Pages) Holtek Semiconductor Inc – 8-Bit Microcontroller

HT49R50
Mnemonic
Miscellaneous
NOP
CLR [m]
SET [m]
CLR WDT
CLR WDT1
CLR WDT2
SWAP [m]
SWAPA [m]
HALT
Description
No operation
Clear data memory
Set data memory
Clear Watchdog timer
Pre-clear Watchdog timer
Pre-clear Watchdog timer
Swap nibbles of data memory
Swap nibbles of data memory with result in ACC
Enter power down mode
Flag Affected
None
None
None
TO,PD
TO*,PD*
TO*,PD*
None
None
TO,PD
Note:
x: 8-bit immediate data
m: 7-bit data memory address
A: accumulator
i: 0~7 number of bits
addr: 10-bit program memory address
Ö: Flag(s) is affected
- : Flag(s) is not affected
*: Flag(s) may be affected by the execution status
**:For the old version of the E.V. chip, the zero flag (Z) can be affected by executing the MOV
A,[M] instruction.
For the new version of the E.V. chip, the zero flag cannot be changed by executing
the MOV A,[M] instruction.
34
October 22, 1999