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Development board for interfacing Chrysler's legacy CCD-bus (no CDP68HC68S1 chip needed).

Home Page: https://chryslerccdsci.wordpress.com/

License: GNU General Public License v3.0

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chrysler dodge jeep ccd-bus obd1 obd2 arduino arduino-mega

ccdbustransceiver's Introduction

CCDBusTransceiver

Development board for interfacing Chrysler's legacy CCD-bus (no CDP68HC68S1 chip needed).

To be used with CCDLibrary.

The Chrysler CCD/SCI Scanner Firmware and GUI works with this hardware. There are obvious limitations of course and there may be connections issues but worth a try.

Get one or two on Tindie!

Wiring (V1.XX):

PCB	Arduino Mega	OBD2 connector
J1 GND	GND
J1 TX	RXD1 + D3
J1 RX	TXD1
J1 +5V	+5V
J2 CCD-		J1962-11
J2 CCD+		J1962-3
J2 GND		J1962-4

Connect TBEN jumpers if standalone operation is needed without a compatible vehicle.
Disconnect TBEN jumpers when connected to a live CCD-bus network in a compatible vehicle.

Wiring (V3.XX):

PCB	Arduino Mega	OBD2 connector
5 CCD+		J1962-3
6 CCD-		J1962-11
7 GND	GND	J1962-4
8 RX	TXD1
9 TX	RXD1
13 CTRL	D3
14 +5V	+5V

https://chryslerccdsci.wordpress.com/2020/03/22/re-designing-the-ccd-bus-transceiver-chip/

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ccdbustransceiver's Issues

Inconsistent dominant voltage values (0-bit) among documentations

From the CDP68HC68S1 datasheet (0.6V):

From another source (0.1V):

I think the latter is closer to reality. With R4 and R5 resistors this voltage drop across the termination resistor (R1) can be set easily.

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