Marantz SR7400 SR8400 RS-232C Command Codes - Page 4

SR7400/8400 RS232C Control Spec. Page: 4 / 17 Document Version [1.00] 3. Detailed Description The interface specification between This product and a Host controller is described below. 3-1. Connection format 3-1-1. Physical connection Host (Controller) RTS Slave (This product) CTS CTS TxD RxD GND RTS RxD TxD GND (Serial setting ) Baud Rate : 9600bps Data Bits : 8bit Parity : None Stop bit : 1bit Handshaking : (RTS/CTS) 3-1-1-1. Data transmission sequence from Host to Slave Host (Controller) Slave (This product) RTS → CTS CTS ← RTS TxD → RxD RxD ← TxD 1. The host checks that CTS is High, then starts a data transmission from TxD. 2. The host performs the data transmission of the number of required bytes, and ends a transmission. * The host can do RTS to Low during the transmission for disable data transmission from a slave. 3-1-1-2. Data transmission sequence from Slave to Host Host (Controller) Slave (This product) RTS → CTS CTS ← RTS TxD → RxD RxD ← TxD 1. The slave checks that CTS is High, then starts a data transmission from TxD. 2. The slave performs the data transmission of the number of required bytes, and ends a transmission. * The slave can do RTS to Low during the transmission for disable data transmission from a host.