Lpc2000

>I need some help getting my i2c to run.
>An lpc2106 board (Master) is connected to a 5V mega16 AVR.
>No interrupt is sent, after the start bit is set.
>
>I have tested the pins P0.2, P0.3, and P0.4 (reference) in GPIO mode,
>and here is, what I find:
>
>P0.4 works fine - it jumps between 0V and 3.3V.
>
>When P0.2 (SCL) is setup with a pull-up resistor (10k ohm) to the
>3.3V supply voltage, it also jumps between 0V and 3.3V. When the
>resistor is removed the numbers are only 0V and 80 mV.
>
>When P0.3 (SDA) has a pull-up resistor (10kOhm) connected, the
>voltage is constant at 0.245V - no float what so ever. After the
>resistor is removed, the pin jumps between 0V and 4 mV
>
>Have my worst fears been realized - have I destroyed something??
You NEED pull-up on both pins! A value in the range 2K2 to 10K is good
(depends on desired speed and power-consumption).
I think you should try another new chips. Seems that you destroyed SDA pin.

regards -
Henry

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