HTG2150 datasheet(39/49 Pages) HOLTEK

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RET

Return from subroutine

Description

Theprogramcounterisrestoredfromthestack.Thisisatwo-cycleinstruction.

Operation

PC ¬ Stack

Affected flag(s)

TC2 TC1

¾¾¾¾¾¾

RET A,x

Return and place immediate data in accumulator

Description

The program counter is restored from the stack and the accumulator loaded

with the specified 8-bit immediate data.

Operation

PC ¬ Stack

ACC ¬ x

Affected flag(s)

TC2 TC1

¾¾¾¾¾¾

RETI

Return from interrupt

Description

The program counter is restored from the stack, and interrupts are enabled

by setting the EMI bit. EMI is the enable master (global) interrupt bit (bit 0;

Operation

PC ¬ Stack

EMI ¬ 1

Affected flag(s)

TC2 TC1

¾¾¾¾¾¾

RL [m]

Rotate data memory left

Description

The contents of the specified data memory is rotated one bit left, with bit 7

rotated into bit 0.

Operation

[m].(i+1) ¬ [m].i; [m].i:bit i of the data memory (i=0-6)

[m].0 ¬ [m].7

Affected flag(s)

TC2 TC1

¾¾¾¾¾¾

HTG2150

July 24, 2000

Preliminary

HTG2150 Datasheet(PDF) 39 Page - Holtek Semiconductor Inc

HTG2150 Datasheet(HTML) 39 Page - Holtek Semiconductor Inc

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