I thought you say Kai has explained th topic in some prev discussions.


I see esacademy.com But cant get much :( on 89C668 .

// Philips 591 I2C Demonstration Project 3
// For the Phytec Development Board with 87C591 phyCORE module
// using the Keil 8051 C Compiler
// (C) Embedded Systems Academy 2000
// Version 1.00 Written by AA 3/19/00


It explains about 591 and some Phytech board and Keil compiler all the three I dont have .I dont even know 668 so how can I understand from 591 ?.

I want to know as you have said IAP to be used for I2C programming what is this? . To program 668 as I2C slave dont one write simply some ASM routine and it stars working in slave mode ,I dont understand inserting codes in IAP layer.

Hope you teach me what to do next ,Kai your also welcome .

Basically I need inter comm between 5 MCUS located on individual cards mounted in the rack .I tried thinking about 232 but it is already in use and cant think to use it .

J.J