Advanced Function Instruction
7-24
FUN49 P
BUNIT
BYTE UNITE
FUN49 P
BUNIT
S ：Starting address of source register to be united
N ：Number of bytes to be united
D ：Registers to store the united data
S, N, D may associate with V、Z、P0~P9 index register to
serve the indirect addressing application
HR ROR DR K
Range
Ope-
rand
R0
∣
R3839
R5000
∣
R8071
D0
∣
D4095
S ○ ○ ○
N ○ ○ ○ 1~256
D ○ ○* ○
● When execution control "EN"=1 or "EN↑"（ P instruction）changes from 0→1, it will perform the byte
combination starting from S, length by N, and then store the results into D registers.
● This instruction will not act if invalid range of length.
● When communicating with intelligent peripheral in binary data format, this instruction may be applied to do
byte combination for following word data processing.
Example：
EN
S :
N :
D :
M2
49P.BUNIT
R 1500
R 999
R 2500
Description：When M2 changes from 0→1, it will perform the byte combination starting from R1500, the length is
assigned by R999, and then store the results into registers starting from R2500.
It is supposed R999=10, the results of combination will store into R2500～R2504.
S D
High Byte Low Byte High Byte Low Byte
R1500 Don’t care Byte-0 R2500 Byte-0 Byte-1
R1501 Don’t care Byte-1 R2501 Byte-2 Byte-3
R1502 Don’t care Byte-2 R2502 Byte-4 Byte-5
R1503 Don’t care Byte-3 R2503 Byte-6 Byte-7
R1504 Don’t care Byte-4 R2504 Byte-8 Byte-9
R1505 Don’t care Byte-5
R1506 Don’t care Byte-6
R1507 Don’t care Byte-7
R1508 Don’t care Byte-8
R1509 Don’t care Byte-9
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