Pinouts >  Aftermarket automotive Head units and Car Stereo
13 pin CD Changer proprietary connector layout
13 pin CD Changer proprietary connector
cable changer kenwood dpx mp3110, Blaupunkt CD Changers and some others ?


Description (may be empty)
1 CH-REQH  Request output to changer; Low : Request
2 GND  
3 Vcc  +12V
4 CH-CON  Changer control out; High : Operation mode Low : Standby
5 CH-MUTE  Mute request from changer; High : Mute
6 AGND  Audio Ground
7 CH-RST  Reset output to changer
8 R  Audio right channel
9 CH-REQC  Request input from changer; Active Low
10 CH-DATAC  Data input from changer
11 CH-DATAH  Data output to changer
12 L  Audio left channel
13 CH_CLK  Clock input/output for changer

Pins 5,8,9,10,12 - for input, pins 1,4,7,11 - for output, pin 13 - input/output.

When the transfer is started by the radio by setting its REQ line (CH-REQH) low it waits for the changer to do the same on its REQ line (CH-REQC) and then sends the 4 byte address header, the data size in bytes and then the data.

The changer can start the communication by lowering its REQ line. The radio will send 4 address bytes and 1 data size byte (which is 40 clock cycles). The radio will set its REQ line low if it accepts the transfer.

A clock rate is 125 KHz. The data is transfered in bytes (8 bits with MSB first) and is valid at the rising clock edge.

According to 7 reports in our database (3 positive and 0 negative) the CD changer old 13 pole connector pinout should be correct.

Is this pinout
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