HT46R46 datasheet(31/42 Pages) HOLTEK

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RET

Return from subroutine

Description

The program counter is restored from the stack. This is a 2-cycle instruction.

Operation

Program Counter

¬ Stack

Affected flag(s)

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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 speci-

fied 8-bit immediate data.

Operation

Program Counter

¬ Stack

ACC

¬ x

Affected flag(s)

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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.

Operation

Program Counter

¬ Stack

EMI

¬ 1

Affected flag(s)

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RL [m]

Rotate data memory left

Description

The contents of the specified data memory are rotated 1 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)

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RLA [m]

Rotate data memory left and place result in the accumulator

Description

Data in the specified data memory is rotated 1 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)

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HT46R46/HT46C46/HT46R47/HT46C47

Rev. 1.00

December 28, 2004

HT46R46 bảng dữ liệu(PDF) 31 Page - Holtek Semiconductor Inc

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