Maxim Integrated DS4830A Optical Microcontroller - Manual (Page 223)

DS4830A User’s Guide
223
RL / RLC Rotate Left Accumulator Carry Flag (Ex/In)clusive
Description:
Rotates the active accumulator left by a single bit position. The RL instruction circulates the
msb of the accumulator (bit 15) back to the lsb (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 Operation:
15 Active Accumulator (Acc) 0 Carry Flag
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