Lpc2000

Hi Sridhar,

if the SPI is configured as master the SSEL pin is an input and must
be held high (pullup)to opperate.
You must chose another I/O pin for the chip select signal of the slave
device.

Andreas Haack
--- In lpc2000@yahoogroups.com, Sridhar gadda <sridhargadda@y...> wrote:
> Does that mean I should give 3.3v at pin SSEL ? 
> could you explian your sencntence "you have make pull up a 3.3V for
> SPI interface to act as a master, and to choose other pin GPIO for
SSEL!!! " .........why sould I choose other GPIO as SSLE ???
>  
> regards 
>  
> Sridhar
> 
> 
> dasbento@a... wrote:
> 
> Hello,
> when you configured as SSEL, you have make pull up a 3.3V for
> SPI interface to act as a master, and to choose other pin GPIO for
SSEL!!!
> 
> Domingos
> 
> 
> 
> 
> Citando Sridhar gadda :
> 
> > 
> > Hi, 
> > when you configured SPI interface , Master as µc. In manual its
> > r> eturn that "LPCconfigured as SPI master MUST select SSEL
> functionality on
> > a> n appropriate pin and have HIGH level on this pin in order to act
> as a
> > mast> er" (page 170)
> > 
> > if you configure PINSEL0 = 0x00005500 // selects SCK0, MISO, MOSI and
> > SSL> E 
> > 
> > but how can we generate HIGH on SSLE pin which is P0.7..........As
> far as
> > > I know you can only generate HIGH on GPIO pins only if they
> configured as
> > O> UTPUT pins. 
> > 
> > My question is how to generate high on SSLE when it is not
> > con> figured as GPIO pin.
> > 
> > Any help and suggestions would be appreciated.
> > 
> > Thanks in advance.
> > 
> > With regards,
> > 
> > Sridhar
> > 
> > 
> > 
> > 
> >
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