Yahoo Groups archive

Lpc2000

Index last updated: 2026-04-28 23:31 UTC

Message

RE: [lpc2000] Re: SPI usage

2005-01-13 by Charles R. Grenz

HI all,

	Does that also include the SSP or only the SPI for the LPC2138?

Regards,
Charles


  



-----Original Message-----
From: lp2000c [mailto:lp2000c@...] 
Sent: Thursday, January 13, 2005 4:22 PM
To: lpc2000@yahoogroups.com
Subject: [lpc2000] Re: SPI usage




This was true for the older devices, but according to Philips, this 
is no longer required for the 213x parts.  You can use SSEL as GPIO. 

--- In lpc2000@yahoogroups.com, "Bill Knight" <BillK@t...> wrote:
> On Thu, 13 Jan 2005 13:22:31 +1100, Bruce Paterson wrote:
> 
> 
> Bruce Paterson wrote:
> 
> A hardware question (it seems to be my day for questions!). If you 
> have SPI port enabled, used as a Master, do you have to tie
the
> SSEL0 pin high, or can you program that pin as a GPIO (and somehow
the 
> SPI core gets a permanent high supplied to it internally) ?
> 
> Seems a waste of an I/O pin to have to tie it high where most SPI
> applications would be SPI master
> ------------------------------------------------------------------
> Bruce
>   I believe the answer is yes, you must tie the SSEL0 pin high even
> when operating in Master mode and yes, it seems a waste.
> 
> -Bill Knight
> http://www.theARMPatch.com





 
Yahoo! Groups Links

Attachments

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.