Maxim Integrated MAXQ622 - Manual (Page 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: 15 0
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: 15 0
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