HT48C10 datasheet(40/59 Pages) HOLTEK

40 / 59 page

RET A,x

Return and place immediate data in the accumulator

Description

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

with the specified 8-bit immediate data.

Operation

← Stack

ACC

← x

Affected flag(s)

TC2

TC1

–

––

–––

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

← Stack

EMI

← 1

Affected flag(s)

TC2

TC1

–

––

–––

RL [m]

Rotate data memory left

Description

The contents of the specified data memory are 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

–

––

–––

RLA [m]

Rotate data memory left and place result in the accumulator

Description

Data in the specified data memory is rotated one bit left with bit 7 rotated

into bit 0, leaving the rotated result in the accumulator. The contents of the

data memory remain unchanged.

Operation

ACC.(i+1)

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

ACC.0

← [m].7

Affected flag(s)

TC2

TC1

–

––

–––

HT48CXX/HT48RXX

25th May ’99

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