Datavideo DN-200 Instruction Manual

Datavideo DN-200 Instruction Manual Manual pdf 19 page image

19DN-200 RS-232 Controller Command SetRev 3.1 July 29, 2006Communication Format:Mode: No synchronizationCharacter Length: 1 start bit + 8 data bits + 1 parity bit + 1 stop bitData Rate: 38,400 BaudParity: OddCommand Format:CMD1, CMD2, Data bytes …., Checksum byteA Command is made up of two address bytes, CMD1 and CMD2, a variable number of Data bytes(Data from 0 up to 15) and a Checksum byte. The Checksum byte is the modulo 256 sum of allpreceding bytes.The most significant nibble of the CMD1 byte represents the command group. The least significantnibble represents the number of Data bytes to follow the CMD2 byte.Command Protocol:CMD1, CMD2, Data bytes …., Checksum byteResponse: ACKOther than the sense command, the unit will respond to all commands affirmatively by sending a threebyte acknowledgement (ACK) if the Checksum is valid. If the Checksum is not valid, the DN-200 willignore the command. Most commands will be responded to within 8 msec. However, a PLAYcommand from an idle state will result in response delay of up to 700 msec. During this busy time, allcommands will be ignored.Summary List of CommandsCommand Name Response NameSystem Control00h, 11h, 11h Device Type Request 12h, 11h, 00h, 00h, 23h Device Type00h, F1h, F1h Next Bin 10h, 01h, 11h ACK00h, F2h, F2h Previous Bin 10h, 01h, 11h ACK00h, F4h, F4h Disable Loop Play 10h, 01h, 11h ACK00h, F5h, F5h Enable Loop Play 10h, 01h, 11h ACK01h, F0h, XXh, csum Select Bin 10h, 01h, 11h ACKConnector Pin AssignmentInterface : 9 pin D-Sub female to 3.5mm JackThe pin assignment of the Controller and DN-200 is shown in the following table:9 Pin D-Sub Controller (P1) DN-200 (P2) 3.5mm JackPin 2 (Rx) 2 Jack RingPin 3 (Tx) 1 Jack TipPin 5 (GND) 3 Jack Sleeve