Marantz CC4300 CC4300 Product Manual - Page 30

English Operations External Control (Serial Interface) RS232C The unit can receive external control signals by connecting a straight cable on the market to the D-sub 9 pin connector for RS232C external control. ❖ Pin Assignment of the Connector RS232C 5 1 9 6 1 NC 2 RX 3 TX 4 NC 5 GND 6 NC 7 NC 8 NC 9 NC ❖ RS232C Physical Specification Cable Connector Baud rate Data bits Parity Stop bit Flow control Straight-type D-Sub 9 pin (Female type) 9600bps 8 bits None 1 bit None ❖ Data Packet A packet contains data from 5 to 8 bytes in length. In serial communication, ASCII code from 00h to 7fh is used. So the HEX data are converted into ASCII code and set to the data packet. The data packet includes CR code (0dh) at the end. Example 1: CD Play (Code: 20 53) [2] [0] [5] [3] CR code 32h 30h 35h 33h 0dh 5 byte Example 2: T.SIZE (Code 20 104 08) [2] [0] [1] [0] [4] [0] [8] CR code 32h 30h 31h 30h 34h 30h 38h 0dh 8 byte The unit can identify following commands on next page. 26