D17133CS datasheet(213/289 Pages) NEC

213 / 289 page

CHAPTER 18

INSTRUCTION SET

198

ADDC MEM00E, MEM001 ; (0.0EH)

← (0.0EH) + (0.41H)

ADDC MEM00F, MEM002 ; (0.0FH)

← (0.0FH) + (0.42H)

(4)

ADDC m, #n4

Add immediate data to data memory with carry flag

<1> OP code

10010

<2> Function

When CMP=0, (m)

← (m) + n4 + CY

Add immediate data to the data memory contents with carry flag (CY), and stores the result in data memory.

When CMP=1, (m) + n4 + CY

The result is not stored in the data memory, and carry flag CY and zero flag Z are changed, according to the

result.

Sets carry flag CY, if a carry occurs as a result of the addition. Resets the carry flag CY, if no carry occurs.

If the addition result is other than zero, zero flag Z is reset, regardless of compare flag CMP.

If the addition result is zero, with the compare flag reset (CMP=0), the zero flag Z is set.

If the addition result is zero, with the compare flag set (CMP=1), the zero flag Z is not changed.

Addition can be executed in binary 4-bit or BCD. The BCD flag for PSWORD specifies which kind of addition

is to be executed.

<3> Example 1

Adds 5 to the 12-bit contents for addresses 0.0DH through 0.0FH, and stores the result in addresses 0.0DH

through 0.0FH;

(0.0FH)

← (0.0FH) + 05H

(0.0EH)

← (0.0EH) + CY

(0.0DH)

← (0.0DH) + CY

MEM00D

MEM

0.0DH

MEM00E

MEM

0.0EH

D17133CS Datasheet(PDF) 213 Page - NEC