Lpc2000

On Thursday 01 April 2004 20:37, berrycake33 wrote:
> Has anybody implemented NAND flash driver on LPC210x ?
>
> Now we are considering using LPC2106 in our project which needs
> a NAND flash to storage data.
> Two UARTs, I2C and SPI are all used for other functions.
> If p0.23 to p0.31 is used for NAND flash data pins, it will occupy
> the pins for JTAG2, so that we can't use JTAG to debug anymore.
>
> Any idea on it ?
>
> Shinn

To implemt a NAND interface you will need more than just the 8 data pins, you 
will also need:

CLE, ALE, CE, RE and WE.

You can probably ignore the R/B line and jsut read back status.

Assuming you are not using SPI at the same time as the NAND, youcould 
potentially multiplex the SPPI data pins with two NAND pins and save two pins.

NAND is pretty fun stuff. I suggest you go read stuff about NAND on the linux 
mtd and YAFFS www. 

-- CHarles