Lpc2000

--- In lpc2000@yahoogroups.com, "Helge Fabricius-Hansen" 
<helge.fabricius@t...> wrote:
> 
> The SPI SSEL pin must be high in Master mode!
> If it goes low in master mode the SPI will change
> to slave mode.
> 
> //Helge
> 
> -----Ursprungligt meddelande-----
> Fran: James Dabbs [mailto:jdabbs@t...]
> Skickat: den 2 mars 2004 14:10
> Till: lpc2000@yahoogroups.com
> Amne: [lpc2000] SPI SSEL Pin
> 
> 
> Reading through the message archives, I see conflicting 
information on
> the SPI SSEL pin.  Bill Knight says the SPI SSEL pin must be 
pulled low
> for the LPC210X to operate as an SPI master, but Aminder says it 
needs
> to be pulled to 3.3V.  Page 127 of the user manual (that I have) 
implies
> that this pin could be used as a GPIO in SPI master mode, and the 
manual
> gives no mandate on the use of this pin in master mode.
> 
> What should I do with this pin?
> 
> 
> 
> 
>  
> Yahoo! Groups Links

The SPI SSEL pin must be pulled high in MASTER mode.  Also this 
pins  could not be used  as a GPIO pins in SPI mode. You have to 
set 14 bit  in PINSEL0 register.