Lpc2000

Watch out! You've used 0xA1 as your address. That implies
a READ. It should be 0xA0 for a write.

Hope this helps,
Danish

--- In lpc2000@yahoogroups.com, "Sutton Mehaffey" <sutton@...> wrote:
>
> I'm back on my I2C problems since I was pulled off the project for a
> month or so.  I'm still having some problems.  The problem I thought
> was I was trying to address a 5V RAM instead of a 3.3V RAM.  I have
> now a couple of ATMEL 256K serial RAM - 2.7V to 5V.  I am still having
> trouble with understanding the status of the I2C bus.  It appears I am
> getting the correct status, but even when the RAM is disconnected.  
> 
> I2C0CONSET = 0x20;    // Issue Start
> (status responds with 0x08)
> I2C0DAT = 0xA1;       // Issue a write command to RAM
            ^^^^ No!
> I2C0CONSET = 0x04;    // Set AA bit for ACK
> I2C0CONCLR = 0x28;    // Clear STA and SI flags
> (status responds with 0x18)