Rainbow-electronics HT49R70A-1 Uživatelský manuál stáhnout pdf (Strana 34)

RET Return from subroutine

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

Operation

PC ¬ Stack

Affected flag(s)

TC2 TC1 TO PD OV Z AC C

¾¾¾¾¾¾¾¾

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

PC ¬ Stack

ACC ¬ x

Affected flag(s)

TC2 TC1 TO PD OV Z AC C

¾¾¾¾¾¾¾¾

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

PC ¬ Stack

EMI ¬ 1

Affected flag(s)

TC2 TC1 TO PD OV Z AC C

¾¾¾¾¾¾¾¾

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)

TC2 TC1 TO PD OV Z AC C

¾¾¾¾¾¾¾¾

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)

TC2 TC1 TO PD OV Z AC C

¾¾¾¾¾¾¾¾

HT49R70A-1

Rev. 1.00 34 December 4, 2001

1 2 ... 29 30 31 32 33 34 35 36 37 38 39 40 41

HT49R70A-1 1
8-Bit LCD Type OTP MCU 1

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