HT48CA0 datasheet(29/36 Pages) HOLTEK

29 / 36 page

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

← Stack

ACC

← x

Affected flag(s)

TC2

TC1

–

––

–––

RETI

Return from interrupt

Description

The program counter is restored from the stack, and interrupts 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 is rotated left one bit 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 accumulator

Description

Data in the specified data memory is rotated left one bit 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

–

––

–––

HT48CA0

23rd July ’98

HT48CA0 Scheda tecnica(PDF) 29 Page - Holtek Semiconductor Inc

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