Marantz SR7300 Marantz AV Receiver IR Remote Code List - Page 6

SR7300/SR7300OSE Hardware Software Interface (HSI) Spec. Page: 6 / 19 Document Version [2.01] 3-3. The transaction sequences and the regulations 3-3-1. The transaction sequences The transactions have two kinds of sequence. *A transaction is a Command from Host then the Slave will be an answer by ACK or NAK. *A transaction is a Status request from Host then the Slave will be an answer by Status answer. 3-3-2. The transaction regulations The transactions have some kinds of regulation. * A Command or a Status request transmission by the Host has to finish within one second. * An answer (ACK, NAK or Status answer) transmittion by the Slave has to finish within one second when got a Command or a Status request from the Host. * The Host must not transmit an another Command or Status request until "it receives a answer by a previous Command or Status request" or "it passes one second from a finishing of previous transmission of a Command or a Status request ". 3-3-3. Example of the transactions RTS CTS CTS RTS TxD Command RxD max. 1sec max. 1sec ACK/NAK RxD Status request max. 1sec TxD max. 1sec Status answer a transaction a transaction Example of the transactions