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Note: From the illustration above, you can see that the command and the command response are output at the same time. This is because
the bit 0 to bit 3 of OPRXD are fixed so that the response can be returned before decoding the command.
OPTXD
OPCLK
OPRXD
OPCLR-N
1 2 3 2
31
6
7
5
or
8
bit0 bit7
Command (first)
Command (second)
Command response (first)
Command response (second)
Note
bit0 bit7
Reset
within
BU5148S
Power ON
Write instruction for LSI
reset
LSI write for LED data,
etc.
Read instruction for
data read
Response check
for OK or NG
Error notification
Instruction for
retransmission
1
2
3
4
7
8
5
6
NO
YES