Maxim Integrated MAXQ622 - Manual (Page 231)

MAXQ612/MAXQ622 User’s Guide
Maxim Integrated 16-21
RR/RRC Rotate Right Accumulator Carry Flag Exclusive/Inclusive
Description: Rotates the active accumulator right by a single bit position . The RR instruction circulates the lsbit
of the accumulator (bit 0) back to the msbit (bit 15) while the RRC instruction includes the Carry (C)
flag in the circular right shift .
Status Flags: C (for RRC only), S, Z (for RRC only)
RR Operation: 15 Active Accumulator (Acc) 0
→
Acc .[14:0] ← Acc .[15:1]; Acc .15 ← Acc .0
Encoding: 15 0
1000 1010 1100 1010
Example(s): ; Acc = A345h, S=1, Z=0
RR ; Acc = D1A2h, S=1, Z=0
RR ; Acc = 68D1h, S=0, Z=0
RRC Operation: 15 Active Accumulator (Acc) 0 Carry Flag
→ →
Acc .[14:0] ← Acc .[15:1]; Acc .15 ← C; C ← Acc .0
Encoding: 15 0
1000 1010 1101 1010
Example(s): ; Acc = A345h, C=1, S=1, Z=0
RRC ; Acc = D1A2h, C=1, S=1, Z=0
RRC ; Acc = E8D1h, C=0, S=1, Z=0