STC89LE53RC datasheet(42/165 Pages) STC

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ADD A,Rn

Bytes:

Cycles:

Encoding:

0 0 1 0

1 r r r

Operation:

ADD

(A)←(A) + (Rn)

←(A) + (Rn)

(A) + (Rn)

ADD A,direct

Bytes:

Cycles:

Encoding:

0 0 1 0

0 1 0 1

direct address

Operation:

ADD

(A)←(A) + (direct)

←(A) + (direct)

(A) + (direct)

ADD A,@Ri

Bytes:

Cycles:

Encoding:

0 0 1 0

0 1 1 i

Operation:

ADD

(A)←(A) + ((Ri))

←(A) + ((Ri))

(A) + ((Ri))

ADD A,#data

Bytes:

Cycles:

Encoding:

0 0 1 0

0 1 0 0

immediate data

Operation:

ADD

(A)←(A) + #data

←(A) + #data

(A) + #data

ADDC A,<src-byte>

Function:

Add with Carry

Description:

ADDC simultaneously adds the byte variable indicated, the Carry flag and the Accumulator,

leaving the result in the Accumulator. The carry and auxiliary-carry flags are set, respectively,

if there is a carry-out from bit 7 or bit 3, and cleared otherwise. When adding unsigned

integers, the carry flag indicates an overflow occured.

OV is set if there is a carry-out of bit 6 but not out of bit 7, or a carry-out of bit 7 but not

out of bit 6; otherwise OV is cleared. When adding signed integers, OV indicates a negative

number produced as the sum of two positive operands or a positive sum from two negative

operands.

Four source operand addressing modes are allowed: register, direct, register-indirect, or

immediate.

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