Lpc2000

--- In lpc2000@yahoogroups.com, "Sutton Mehaffey" <sutton@...> wrote:
>
> Yes.  I'm using the Embedded Artists 2148 Demo board, in which the
> schematic shows pullups.  I'm connecting a RAM chip via their
> accessory prototype board, which has direct connections to the I2C bus.
> 
> Sutton
> 
> 
What bit rate are you running the I2C bus at?
The open drain I2C bus speed capability depends on the size of the
pull up resistors on the bus, since they determine the rise time with
the bus capacitance. If you are trying to go faster than the bus
resistors can handle, you will encounter bus errors. To debug your
driver logic it would probably be helpful to run the bus at a slow
speed until you are more sure there are no software errors.

-- Dave