Compaq NetPorty II manual Protocol Interface

Hardware

Protocol Interface

3.3Protocol Interface

The product has two CAN protocol chips at a frequency of 16 MHz. The SJA1000 chip is connected to the 9 pin D-SUB connector with the CiA pinning. The optional 82527 is also connected to the 9 pin D-Sub connector without physical line driver.

The C165 uses the CS2 signal to select the SJA1000.

The NetPorty II can be equipped with a second CAN channel. Therefore a 82527 will be mounted on the PCB. The C165 uses the CS3 signal to select the 82527.

If 2 CAN channels are used there is no standard pinning at the D-Sub connector. The physical line driver for the second CAN channel is available via the connecting cable (not included in standard delivery contents) and can be used optional by your special application.

In stade of the second CAN channel a diagnosis channel can be used. Therefor an UART 16CS550 can be mounted on the PCB instead of the 82527. The C165 uses the CS3 signal to select the UART.

The physical line driver for the ISO 9141 interfacing can be ordered separately

Version 1.03 3-4