[QUERY] Behavior of spi slave memories w.r.t chip select signal.

On 05/11/2011 12:47 PM, Jamie Iles wrote:

What SPI controller are you using?  I've seen a similar issue with the 
Synopsys DesignWare SPI controller where the controller manages the chip 
select itself, and once the FIFO is emptied the CS goes away, but the 
flash chip requires it to stay high for the whole transaction.  In this 
case the workaround is to use a GPIO as a chip select and there are 
other controllers that do the same thing for the same reason (I think 
that pxa2xx_spi is one of them).

I am using amba pl022 controller and using external gpio's to control
chip select signal. cs is kept low for entire message, but still i am facing
this issue.

-- 
viresh