Omron CS1G/H-CPUxxH Instructions Manual page 432

Symbol Math Instructions
Description
Flags
Precautions
Examples
Area
Indirect DM/EM
addresses in BCD
Constants
Data Registers
Index Registers
Indirect addressing
using Index Registers
*U(420) multiplies the binary values in Md and Mr and outputs the result to R,
R+1.
Md
×
Mr
R +1 R
Name Label
Error Flag ER
Equals Flag =
Negative Flag N
When *U(422) is executed, the Error Flag will turn OFF.
If as a result of the multiplication, the content of R, R+1 is 0000 hex, the
Equals Flag will turn ON.
If as a result of the multiplication, the content of the leftmost bit of R+1 is 1,
the Negative Flag will turn ON.
When CIO 000000 is ON in the following example, D00100 and D00110 will
be multiplied as 4-digit unsigned binary values and the result will be output to
D00121 and D00120.
Md
*D00000 to *D32767
*E00000 to *E32767
*En_00000 to *En_ 32767
(n = 0 to C)
#0000 to #FFFF
(binary)
DR0 to DR15
---
,IR0 to ,IR15
–2048 to +2047 ,IR0 to –2048 to +2047 ,IR15
DR0 to DR15, IR0 to IR15
,IR0+(++) to ,IR15+(++)
,–(– –)IR0 to, –(– –)IR15
(Unsigned binary)
(Unsigned binary)
(Unsigned binary)
Operation
OFF
ON when the result is 0.
OFF in all other cases.
ON when the leftmost bit of the result is 1.
OFF in all other cases.
Section 3-11
Mr R
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411