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6F3B0250
Basic Hardware and Function
219
7. Instructions
FUN 121 DEC Decode
Expression
Input
-
[
A
DEC (
n
)
B
]
-
Output
Function
When the input is ON, this instruction sets the bit position which is designated by lower
n
bits of
A
to
ON in the bit table, size 2
n
bits starting with 0 bit (LSB) of
B
, and resets all other bits to OFF.
Execution condition
Input Operation Output
OFF No execution OFF
ON Execution ON
Operand
Name Device Re
g
ister Constant Index
X Y R S T. C. XW YW RW SW T C D I J K
A
Decode source
ÖÖÖÖÖÖÖÖÖÖ
n
Table size 1 - 8
B
Start of table
ÖÖÖÖÖÖ
Example
2
5
(=32) bits starting with 0 bit of RW05 (R050 to R06F) are defined as the bit table.
When R011 is ON, the bit position designated by lower 5 bits of D0011 in the bit table is set to ON,
and all other bits in the table are reset to OFF.
The following figure shows an operation example.
FEDCBA9876543210
D0011 1 1 0 0 0
Ignored H18 (=24)
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 3 2 1 0
00000001000000000000000 0000
RW06 RW05
Sets ON
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