ST6253C datasheet(60/83 Pages) STMICROELECTRONICS

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ST6253C ST6263C ST6263B ST6260C ST6260B

INSTRUCTION SET (Cont’d)

Arithmetic and Logic. These instructions are

used to perform the arithmetic calculations and

logic operations. In AND, ADD, CP, SUB instruc-

tions one operand is always the accumulator while

the other can be either a data space memory con-

tent or an immediate value in relation with the ad-

dressing mode. In CLR, DEC, INC instructions the

operand can be any of the 256 data space ad-

dresses. In COM, RLC, SLA the operand is always

the accumulator.

Table 18. Arithmetic & Logic Instructions

Notes:

X,Y.Indirect Register Pointers, V & W Short Direct RegistersD. Affected

# . Immediate data (stored in ROM memory)* . Not Affected

rr. Data space register

Instruction

Addressing Mode

Bytes

Cycles

Flags

ADD A, (X)

Indirect

ADD A, (Y)

Indirect

ADD A, rr

Direct

ADDI A, #N

Immediate

AND A, (X)

Indirect

AND A, (Y)

Indirect

AND A, rr

Direct

ANDI A, #N

Immediate

CLR A

Short Direct

CLR r

Direct

COM A

Inherent

CP A, (X)

Indirect

CP A, (Y)

Indirect

CP A, rr

Direct

CPI A, #N

Immediate

DEC X

Short Direct

DEC Y

Short Direct

DEC V

Short Direct

DEC W

Short Direct

DEC A

Direct

DEC rr

Direct

DEC (X)

Indirect

DEC (Y)

Indirect

INC X

Short Direct

INC Y

Short Direct

INC V

Short Direct

INC W

Short Direct

INC A

Direct

INC rr

Direct

INC (X)

Indirect

INC (Y)

Indirect

RLC A

Inherent

SLA A

Inherent

SUB A, (X)

Indirect

SUB A, (Y)

Indirect

SUB A, rr

Direct

SUBI A, #N

Immediate

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