The 2700 ALLPRO is based on a ATMEL T89C51CC02 microcontroller running in X2 mode that allows a 32 Mhz internal frequency at 16 MHz standard crystal.
This chip is provided to convert all known protocol to RS232 format. Because of its pin compatibility with OE90C2600 industry standard IC, it will work on a mOByDic 2600 PCB. Only the Battery voltage measuring, Dual K line and ALDL fonctions are not directly realisable on this PCB.

SOFTWARE INTERFACING TO CHIP
OE90C2700 communicates via RS232 with 9600/8/n/1 default setting parameter PC is master and mOByDic is slave. Message are based on query/reply structure. The chips gives never starts communication itself. The communication works on half duplex basis. The 2700 has a communication timeout of 2 sec. after the 1. byte of message is received. A RS232 buffer of 256 bytes is provided.

RS232 device driver routines
If the user sends a 1 to mOByDic, mOByDic responds with 1. This function allows a line checking or device connected checking. Some delphi exemples show how to begin to communicate with mOByDic.

Description:

OBDII is an international standard for communication between automobiles and diagnostic testers. It specifies a serial data communication bus between ECUs and diagnostic test SAE OBDII Scan Tool (SAE j1978). The OE90C2700 provides an inteligent interface between a Host and the vehicle’s Electronic control units. Both LEDs display the current communication status and connected information. OE90C2700 is developed to meet the standard with ISO9141, KWP2000, SAE j1850, ALDL, j1939, KW1281, KW71, KW82 and ISO15765 CAN protocols.



Features:

• Compatible with EOBD/OBDII standard
• RS232 Communication till 115200 Baud
• EOBD Modes 1..9 / J2012 modes 10-FF
• Hardware and software handshaking
• ISO9141-2, KWP2000, ALDL8192, KW1281, KW71, KW82, J1850 VPWM and PWM Support
• 3 separate receiving CAN Buffer
• CAN ISO15765 and J1939-71 messaging
• Multiple response from multiple ECU
• Physical and fonctional addressing

Datenblatt des "OE90C2700" von Özen Elektronik.

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