4502 datasheet(64/116 Pages) RENESAS

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Rev.3.01

2005.02.02

page 64 of 112

REJ03B0105-0301

4502 Group

CMA (CoMplement of Accumulator)

0000011100

01C

–

Grouping:

Arithmetic operation

Description: Stores the one’s complement for register

A’s contents in register A.

Operation:

(A)

← (A)

CMCK (Clock select: ceraMic resonance ClocK)

1010011010

29A

–

Grouping:

Other operation

Description: Selects the ceramic resonance circuit and

stops the on-chip oscillator.

Operation:

Ceramic resonance circuit selected

CRCK (Clock select: Rc oscillation ClocK)

1010011011

29B

–

Grouping:

Other operation

Description: Selects the RC oscillation circuit and stops

the on-chip oscillator.

Operation:

RC oscillation circuit selected

DEY (DEcrement register Y)

0000010111

017

–

(Y) = 15

Grouping:

RAM addresses

Description: Subtracts 1 from the contents of register Y.

As a result of subtraction, when the con-

tents of register Y is 15, the next instruction

is skipped. When the contents of register Y

is not 15, the next instruction is executed.

Operation:

(Y)

← (Y) – 1

MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)

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