UPD17P136ACT datasheet(106/292 Pages) NEC

106 / 292 page

CHAPTER 11 ARITHMETIC AND LOGIC UNIT (ALU)

Table 11-1. List of ALU Instructions (2/2)

ALU Function

Difference in operation because of program status word (PSWORD)

Arithmetic

operation

Logical

operation

Bit judgement

Comparison

Rotation

Dont’care

Don’t care

Not affected

Don’t care

Executed

(retained)

Dont’care

Reset

Not affected

Don’t care

Executed

(retained)

Dont’care

Don’t care

Not affected

Don’t care

Executed

(retained)

Dont’care

Don’t care

Not affected

Value of b0 of

Don’t care

Executed

(retained)

general register

(retained)

Value of

Operation

CY flag

Z flag

Modification

BCD flag

CMP flag

when IXE = 1

Binary operation.

Set if operation result is 0000B;

Executed

Result is stored.

otherwise, reset

Binary operation.

Retains status if operation result

Result is not stored.

is 0000B; otherwise, reset

BCD operation.

Set if operation result is 0000B;

Result is stored.

otherwise, reset

BCD operation.

Retains status if operation result

Result is not stored.

is 0000B; otherwise, reset

Set when

carry or

borrow

occurs;

otherwise,

reset

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