SRP-X351P SONY | Alldatasheet
Document overview
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Technical content
1999 Sony Sound Tec. Corp
Sony SRP-X351P RS232C Protocol Manual
1 Outline
This manual describes technical information necessary to control the SRP-X351P via the 9 pin RS-232C port. It is intended solely for users of the SRP-X351P. Hexadecimal numbers are shown in italics with an ”H” suffix. Example: 18 (decimal) = 12H (hexadecimal)
2 Physical Connection
The SRP-X351P uses a D-Sub9 male connector for communication via RS-232C. The pin assignments are shown below: 1 N.C.
2 TXD (Input to SRP-x300)
3 RXD (Output from SRP-x300)
4 Connected to 6 in SRP-x300
5 GND
6 Connected to 4 in SRP-x300
7 Connected to 8 in SRP-x300
8 Connected to 7 in SRP-x300
9 N.C. Communication settings for RS-232C The SRP-X351P uses the following communication settings: Communication mode : half dupl ex mode (asynchronous) Character length : 8bit Parity : odd parity S t o p b i t l e n g t h : 1 b i t B i t o r d e r : L S B f i r s t Baud rate : 9600bps
3 Provisions for communication
Acknowledge (ACK) , No Acknowledge (NAK) When the SRP-X351P receives a defined command, it transmits ACK and when the 1 5 6 9 2 3 4 7 8
Sony SRP-X351P RS232C Protocol Manual SRP-X351P can not receive a command normally, it transmits NAK. Commands The controller should transmit a command after receiving ACK or NAK. Time out (1) When there is no response from the SRP-X351P after 100ms of sending a command, the controller should transmit the same command again. Time out (2) The controller should transmit a command within 500ms. When the controller transmits a command in more than 500ms, the SRP-X351P send back NAK with no handling a command. NAK When the controller receives NAK during transmitting a command, the controller should stop transmission of commands immediately. Handshake Communication is done by handshake. The Control line of the RS-232C must be used for communication.
4 Command List
ACK ( 0AH) NAK ( 0BH) When the SRP-X351P can not receive a command normally, this command is sent with 1 byte variable describing the error: NAK ( 0BH) TIME OUT ( 02H) When the SRP-X351P can not receive DELIMITA (B1H) from the controller within 500ms receiving command, this command is sent. NAK ( 0BH) E R R O R (04H) When there is communication error of RS-232C (Parity error, Framing error, Over run error), this command is sent. NAK ( 0BH) NOT FIND ( 05H)
Sony SRP-X351P RS232C Protocol Manual When the SRP-X351P receives an undefined command, this command is sent after receiving DELIMITA (B1H). ST3 Input Selection ST3 SELECT INPUT A ( 11H 80H 20H B1H) INPUT A of ST3 is selected. ST3 SELECT INPUT B ( 11H 80H 21H B1H) INPUT B of ST3 is selected. ST3 SELECT INPUT C (11 H 80H 22H B1H) INPUT C of ST3 is selected. ST3 SELECT INPUT D (11 H 80H 23H B1H) INPUT D of ST3 is selected. Output MUTE MUTE OFF (11 H 81H 20H B1H) Muting function of the SRP-X351P is released. MUTE ON (11 H 81H 21H B1H) Muting function of the SRP-X351P is active. Master Volume MASTER VOLUME DOWN (11 H 82H 20H B1H) Master volume level is decreased. M A S T E R V O L U M E U P ( 1 1H 82H 21H B1H) Master volume level is increased. MASTER VOLUME STOP (11 H 82H 22H B1H) Master volume level remains in its position.