Omron SYSMAC CJ - REFERENCE MANUAL 08-2008

372
Data Shift Instructions Section 3-9
Description ASLL(570) shifts the contents of Wd and Wd +1 one bit to the left (from right-
most bit to leftmost bit). “0” is placed in the rightmost bit of Wd and the con-
tents of the leftmost bit of Wd and Wd +1 are shifted into the Carry Flag (CY).
Flags
Precautions When ASLL(570) is executed, the Error Flag will turn OFF.
If as a result of the shift the contents of Wd and Wd +1 are zero, the Equals
Flag will turn ON.
If as a result of the shift the contents of the leftmost bit of Wd +1 is 1, the Neg-
ative Flag will turn ON.
Examples When CIO 000000 is ON, word CIO 0100 and CIO 0101 will shift one bit to
the left. “0” is placed into CIO 010000 and the contents of CIO 010015 will be
shifted to the Carry Flag (CY).
Auxiliary Bit Area A448 to A958
Timer Area T0000 to T4094
Counter Area C0000 to C4094
DM Area D00000 to D32766
EM Area without bank E00000 to E32766
EM Area with bank En_00000 to En_32766
(n = 0 to C)
Indirect DM/EM
addresses in binary
@ D00000 to @ D32767
@ E00000 to @ E32767
@ En_00000 to @ En_32767
(n = 0 to C)
Indirect DM/EM
addresses in BCD
*D00000 to *D32767
*E00000 to *E32767
*En_00000 to *En_32767
(n = 0 to C)
Constants ---
Data Registers ---
Index Registers ---
Indirect addressing
using Index Registers
,IR0 to ,IR15
–2048 to +2047 ,IR0 to –2048 to +2047 ,IR15
DR0 to DR15, IR0 to IR15
,IR0+(++) to ,IR15+(++)
,–(– –)IR0 to, –(– –)IR15
Area Wd
WdWd+1
Name Label Operation
Error Flag ER OFF
Equals Flag = ON when the shift result is 0.
OFF in all other cases.
Carry Flag CY ON when 1 is shifted into the Carry Flag (CY).
OFF in all other cases.
Negative Flag N ON when the leftmost bit is 1 as a result of the shift.
OFF in all other cases.