4571 Datasheet, PDF(75/126 Page) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

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4571 Datasheet, PDF (75/126 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

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4571 Group

MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)

EPOF (Enable POF instruction)

Instruc-

tion

code

0 0 0 1 0 1 1 0 1 1 2 0 5 B 16

Number of

words

Number of

cycles

Flag CY

Skip condition

Opera- POF instruction valid

tion:

Grouping: Other operation

Description: Makes the immediate after POF instruction valid by exe-

cuting the EPOF instruction.

IAK (Input Accumulator from port K)

Instruc-

tion

code

1 0 0 1 1 0 1 1 1 1 2 2 6 F 16

Number of

words

Number of

cycles

Flag CY

Skip condition

Opera- (A0) â (K)

tion: (A3âA1) â 0

Grouping: Input/Output operation

Description: Transfers the input of port K to the least significant bit (A0)

of register A. â0â is stored to the high-order 3 bits (A3âA1)

of register A.

IAP0 (Input Accumulator from port P0)

Instruc-

tion

code

1 0 0 1 1 0 0 0 0 0 2 2 6 0 16

Number of

words

Number of

cycles

Flag CY

Skip condition

Opera- (A) â (P0)

tion:

Grouping: Input/Output operation

Description: Transfers the input of port P0 to register A.

IAP1 (Input Accumulator from port P1)

Instruc-

tion

code

1 0 0 1 1 0 0 0 0 1 2 2 6 1 16

Number of

words

Number of

cycles

Flag CY

Skip condition

Opera- (A) â (P1)

tion:

Grouping: Input/Output operation

Description: Transfers the input of port P1 to register A.

Rev.1.02 May 25, 2007 Page 75 of 124

REJ03B0179-0102

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