HTG1390 datasheet(16/27 Pages) HOLTEK

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Instruction Definitions

ADC A,[R1R0]

Add data memory contents and carry to accumulator

Machine code

0 0 0 0 1 0 0 0

Description

The contents of the data memory addressed by the register pair “R1,R0”

and the carry are added to the accumulator. Carry is affected.

Operation

ACC

← ACC+M(R1,R0)+CF

ADD A,XH

Add immediate data to accumulator

Machine code

0 1 0 0 0 0 0 0

0 0 0 0 d d d d

Description

The specified data is added to the accumulator. Carry is affected.

Operation

ACC

← ACC+XH

ADD A,[R1R0]

Add data memory contents to accumulator

Machine code

0 0 0 0 1 0 0 1

Description

The contents of the data memory addressed by the register pair “R1,R0” is

added to the accumulator. Carry is affected.

Operation

ACC

← ACC+M(R1,R0)

AND A,XH

Logical AND immediate data to accumulator

Machine code

0 1 0 0 0 0 1 0

0 0 0 0 d d d d

Description

Data in the accumulator is logically ANDed with the immediate data speci-

fied by the code.

Operation

ACC

← ACC “AND” XH

AND A,[R1R0]

Logical AND accumulator with data memory

Machine code

0 0 0 1 1 0 1 0

Description

Data in the accumulator is logically ANDed with the data memory ad-

dressed by the register pair “R1,R0”.

Operation

ACC

← ACC “AND” M(R1,R0)

AND [R1R0],A

Logical AND data memory with accumulator

Machine code

0 0 0 1 1 1 0 1

Description

Data in the data memory addressed by the register pair “R1,R0” is logi-

cally ANDed with the accumulator

Operation

M(R1,R0)

← M(R1,R0) “AND” ACC

HTG1390

Preliminary

17th Nov ’98

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