Hi Andy,

I understood you. I don't have experience about I2C. I thought the I2C ISR could do all the I2C communication. I started to used soft I2C in AT89S52, but I changed to the LPC952.

Then, I was wrong. How can I do the I2C start condition, to read, to write a byte and many bytes ?

You comment about i2c_init() and I pass 0xA0. I wish to communicate with the memory. The description about the funtion is

"DESC: initializes the I2C peripheral and interrupt
sets the device's I2C address and whether it will
respond to the general call address
Uses a data rate of 99.6324kHz
RETURNS: Nothing"

I thought I was initialize the e2prom. The I2C E2prom address is 0xA0.

Can I to use some code from CA to communicate with e2prom ?

The steps to use I2C memory is:

start condition
write address device
write low address (LSB)
write high address (MSB)
write (or read) to (or from) memory
stop contition

Is this correct ?

I'm going to check the signals, but I unable to see the Ack from e2prom. I don't know how to do it.

Jorge