Lpc2000

You might receive NACK sometimes, what you could do is make your 
algorithm try again. Have you checked the Philips Document "80C51 
Family Derivatives - 8XC552/562 overview"??? (page 23)
It shows all the posible Status Codes you can get.. it's the guide 
while making your algorithm.

Regards,
Gonzalo

--- In lpc2000@yahoogroups.com, "skijag2" <skijag2@y...> wrote:
> Using the Philips LPC 2129, I set-up an I2C slave mode to talk to 
a 
> master device.  The microcontroller, recieves and sends data 
> correctly most of the time, but about 1/100 times, when the MC 
> recieves:
> 
> [SLA][W] it sends a NACK (no acknowledge) back to the master 
instead 
> of an ACK.  In the software a NACK is never sent, so it is unclear 
> why the hardware occasionally sends back a NACK. 
> 
> Has anyone else seen this behavior?  Could it be an errata with 
the 
> Microcontroller?  I'm not sure what I can do to debug this?  Any 
> suggestions?