6F3B0253
Basic Hardware and Function 165
7. Instructions
FUN 069 SHL1 1 bit shift left
Expression
Input [ SHL1 A ] Output
Function
When the input is ON, the data of register A is shifted 1 bit to the left (MSB direction). 0 is stored in
the right most bit (LSB). The pushed out bit state is stored in the carry flag (CF = S050). After the
operation, if the left most bit (MSB) is ON, the output is turned ON.
Execution condition
Input Operation O utput CF
OFF No execution OFF
ON Ex ecution W hen MSB = 1 ON Set or reset
When MSB = 0 OFF Set or reset
Operand
Name Device Register Constant Index
X Y R S T. C. XWYWRWSW T C D I J K
AOperation data √√√√√√√√√ √
Example
When X008 is changed from OFF to ON, the data of RW15 is shifted 1 bit to the left.
The figure below shows an operation example.
(MSB) (LSB)
FEDCBA9876543210
1110011100111010
CF
1 1100111001110100
R002 is turned ON 0
RW15
RW15 (Result)