Maxim-integrated MAXQ622 Manual do Utilizador descarregar pdf (Página 230)

MAXQ612/MAXQ622 User’s Guide

16-20 Maxim Integrated

RL/RLC

Rotate Left Accumulator Carry Flag Exclusive/Inclusive

Description:

Rotates the active accumulator left by a single bit position. The RL instruction circulates the msbit of

the accumulator (bit 15) back to the lsbit (bit 0) while the RLC instruction includes the Carry (C) flag

in the circular left shift.

Status Flags:

C (for RLC only), S, Z (for RLC only)

RL Operation:

15 Active Accumulator (Acc) 0

←

Acc.[15:1] ← Acc.[14:0]; Acc.0 ← Acc.15

Encoding:

1000 1010 0100 1010

Example(s):

; Acc = A345h, S=1, Z=0

RL ; Acc = 468Bh, S=0, Z=0

RL ; Acc = 8D16h, S=1, Z=0

RLC

15 Active Accumulator (Acc) 0 Carry Flag

Operation:

← ←

Acc.[15:1] ← Acc.[14:0]; Acc.0 ← C; C ← Acc.15

Encoding:

1000 1010 0101 1010

Example(s):

; Acc = A345h, C=1, S=1, Z=0

RLC ; Acc = 468Bh, C=1, S=0, Z=0

RLC ; Acc = 8D17h, C=0, S=1, Z=0

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Maxim-integrated MAXQ622 Manual do Utilizador Página 230