HT36B2 datasheet(21/39 Pages) HOLTEK

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Mnemonic

Description

Instruction

Cycle

Flag

Affected

Branch

JMP addr

SZ [m]

SZA [m]

SZ [m].i

SNZ [m].i

SIZ [m]

SDZ [m]

SIZA [m]

SDZA [m]

CALL addr

RET

RET A,x

RETI

Jump unconditionally

Skip if data memory is zero

Skip if data memory is zero with data movement to ACC

Skip if bit i of data memory is zero

Skip if bit i of data memory is not zero

Skip if increment data memory is zero

Skip if decrement data memory is zero

Skip if increment data memory is zero with result in ACC

Skip if decrement data memory is zero with result in ACC

Subroutine call

Return from subroutine

Return from subroutine and load immediate data to ACC

Return from interrupt

(2)

(3)

(2)

None

Table Read

TABRDC [m]

TABRDL [m]

Read ROM code (current page) to data memory and TBLH

Read ROM code (last page) to data memory and TBLH

(1)

None

Miscellaneous

NOP

CLR [m]

SET [m]

CLR WDT

CLR WDT1

CLR WDT2

SWAP [m]

SWAPA [m]

HALT

No operation

Clear data memory

Set data memory

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

(1)

None

TO,PDF

(4),PDF(4)

None

TO,PDF

Note:

x: Immediate data

m: Data memory address

A: Accumulator

i: 0~7 number of bits

addr: Program memory address

Ö: Flag is affected

-: Flag is not affected

(1): If a loading to the PCL register occurs, the execution cycle of instructions will be delayed for one more cycle

(four system clocks).

(2): If a skipping to the next instruction occurs, the execution cycle of instructions will be delayed for one more

cycle (four system clocks). Otherwise the original instruction cycle is unchanged.

(3): (1) and (2)

(4): The flags may be affected by the execution status. If the Watchdog Timer is cleared by executing the

CLR WDT1 or CLR WDT2 instruction, the TO and PDF are cleared.

Otherwise the TO and PDF flags remain unchanged.

HT36B2

Rev. 1.10

March 10, 2005

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