455A Datasheet, PDF(95/148 Page) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

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455A Datasheet, PDF (95/148 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

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455A Group

MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)

OP1A (Output port P1 from Accumulator)

Instruc-

tion

code

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

Number of

words

Number of

cycles

Flag CY

Skip condition

Opera- (P1) â (A)

tion:

Grouping: Input/Output operation

Description: Outputs the contents of register A to port P1.

OP2A (Output port P2 from Accumulator)

Instruc-

tion

code

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

Number of

words

Number of

cycles

Flag CY

Skip condition

Opera- (P2) â (A)

tion:

Grouping: Input/Output operation

Description: Outputs the contents of the register A to port P2.

OP3A (Output port P3 from Accumulator)

Instruc-

tion

code

1 0 0 0 1 0 0 0 1 1 2 2 2 3 16

Number of

words

Number of

cycles

Flag CY

Skip condition

Opera- (P3) â (A)

tion:

Grouping: Input/Output operation

Description: Outputs the contents of the register A to port P3.

OR (logical OR between accumulator and memory)

Instruc-

tion

code

0 0 0 0 0 1 1 0 0 1 2 0 1 9 16

Number of

words

Number of

cycles

Flag CY

Skip condition

Opera- (A) â (A) OR (M(DP))

tion:

Grouping: Arithmetic operation

Description: Takes the OR operation between the contents of register A

and the contents of M(DP), and stores the result in register

Rev.1.01 Feb 15, 2008 Page 95 of 146

REJ03B0224-0101

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