User`s manual

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90:PANEL Backlight Driver Error
The data must be ASCII characters strings.
Example) The byte data 70 is encoded as ASCII characters '7' and '0' (37h and 30h).
ETX (03h): End of Message
Check code
BCC: Block Check Code
Refer to the section 4.5 “Check code” for a BCC calculation.
Delimiter
CR (0Dh): End of packet