1) rmc90 control se800, key command = key_take

    the command stream = f0h,21h,0eh,03h,12h,00h,00h,00h,00h,00h,00h,34h,33h,ffh

    length = 14 bytes=0eh

    checksum= (f0h+21h+0eh+03h+12h+00h+00h+00h+00h+00h+00h) = 34h

    checksum_low =04h+30h = 34h

    checksum_high=03h+30h = 33h

    2) se800 return data,

    the return data stream =fch,21h,14h,03h,00h,00h,00h,01h,01h,03h,01h,00h,00h,00h,00h,00h,00h,3ah,33h,ffh

    length =20 bytes=14h

    checksum = (fch+21h+13h+03h+00h+01h+01h+03h+01h+0+0+0+0+0+0+0) = 3ah

    checksum_low =0ah+30h = 3ah

    checksum_high=03h+30h = 33h

    the se800 automatically return data every video field to update the led data and scan the remote control command every video field.