Sony FWD-32LX1 Protocol Manual - Page 5

1. Communication Parameter Communication system Synchronous system Baud rate Character length Parity Start bit Stop bit Flow control RS-232C Asynchronous communication 9600 bps 8 bit None 1 bit 1 bit None 2. Pin Configuration Display side (D-sub 9-pin) Host side (D-sub 9-pin) FWD-42LX1/N FWD-32LX1/N 5 43 21 9876 _ External view _ Pin No. 1 2 3 4 5 6 7 8 9 Signal NC RD TD NC GND NC NC NC NC Personal computer 5 43 21 9876 _ External view _ Pin No. 1 2 3 4 5 6 7 8 9 Signal NC RD TD NC GND NC NC NC NC 3. Communication Data Format (a) Control (Host → Request of Write to Display) No. Item Value 1 Header 0x8C:Control 2 Category 0xXX 3 Function 0xXX 4 Data1 (Length) 0xXX 5 Data2 (Data1) 0xXX : : 0xXX : : 0xXX X DataX 0xXX X+1 Check Sum 0xXX * Check Sum: Sum total of 1 to X. Lower one-byte data is validated when a value exceeds 255 (1 byte). * Set the command interval to 500 ms or more when transmitting the Control command continuously. * Set the command interval to 500 ms or more when transmitting the same command (Enquiry) after the Control command. (b) Enquiry (Host → Request of Read to Display) No. Item Value 1 Header 2 Category 3 Function 0x83:Enquiry 0xXX 0xXX 4 Data1 0xFF 5 Data2 0xFF 6 Check Sum 0xXX * Check Sum: Sum total of 1 to 5. Lower one-byte data is validated when a value exceeds 255 (1 byte). FWD-42LX1 1 FWD-32LX1