LPC2106, SPI and SSEL
2005-10-21 by rtstofer
Can I leave P0.7 as GPIO and ignore SSEL while using the SPI as a master device only? I am seriously short of pins! Richard
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LPC2106, SPI and SSEL
RE: [lpc2000] LPC2106, SPI and SSEL
2005-10-21 by Dan Beadle
NO. _____
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From: lpc2000@yahoogroups.com [mailto:lpc2000@yahoogroups.com] On Behalf Of rtstofer Sent: Friday, October 21, 2005 1:17 PM To: lpc2000@yahoogroups.com Subject: [lpc2000] LPC2106, SPI and SSEL Can I leave P0.7 as GPIO and ignore SSEL while using the SPI as a master device only? I am seriously short of pins! Richard SPONSORED LINKS Microprocessor <http://groups.yahoo.com/gads?t=ms&k=Microprocessor&w1=Microprocessor&w2 =Microcontrollers&w3=Pic+microcontrollers&w4=8051+microprocessor&c=4&s=9 3&.sig=tsVC-J9hJ5qyXg0WPR0l6g> Microcontrollers <http://groups.yahoo.com/gads?t=ms&k=Microcontrollers&w1=Microprocessor& w2=Microcontrollers&w3=Pic+microcontrollers&w4=8051+microprocessor&c=4&s =93&.sig=DvJVNqC_pqRTm8Xq01nxwg> Pic microcontrollers <http://groups.yahoo.com/gads?t=ms&k=Pic+microcontrollers&w1=Microproces sor&w2=Microcontrollers&w3=Pic+microcontrollers&w4=8051+microprocessor&c =4&s=93&.sig=TpkoX4KofDJ7c6LyBvUqVQ> 8051 microprocessor <http://groups.yahoo.com/gads?t=ms&k=8051+microprocessor&w1=Microprocess or&w2=Microcontrollers&w3=Pic+microcontrollers&w4=8051+microprocessor&c= 4&s=93&.sig=1Ipf1Fjfbd_HVIlekkDP-A> _____ YAHOO! GROUPS LINKS * Visit your group "lpc2000 <http://groups.yahoo.com/group/lpc2000> " on the web. * To unsubscribe from this group, send an email to: lpc2000-unsubscribe@yahoogroups.com <mailto:lpc2000-unsubscribe@yahoogroups.com?subject=Unsubscribe> * Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service <http://docs.yahoo.com/info/terms/> . _____ [Non-text portions of this message have been removed]
Re: [lpc2000] LPC2106, SPI and SSEL
2005-10-21 by Bill Knight
Not on a 2106 though some of the newer parts are suppose to have rectified this. -Bill Knight R O SoftWare & http://www.theARMPatch.com
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On Fri, 21 Oct 2005 20:16:31 -0000, rtstofer wrote: >Can I leave P0.7 as GPIO and ignore SSEL while using the SPI as a >master device only? >I am seriously short of pins! >Richard > >Yahoo! Groups Links >
Re: LPC2106, SPI and SSEL
2005-10-21 by Mark Butcher
Hi Richard In the future maybe but the present chip has a bug and the SPI only works if SSEL is configured for SPI use and pulled high. After working that out I found it to be good as master. I haven't found any details about problems as slave but did come to the conclusion that it is unusable - confirmed by someone else with the same wierd findings as my own in this group some time later. I have used SPI on many devices as master and as slave, have a good JTAG debugger, scopes and logic analysers but the LPC2106 as SPI slave beat me - its behaviour could not be explained, otherwise I wouldn't actually have used it as master communicating with an HCS12 device (it was planed the other way round..). Cheers Mark Butcher www.mjbc.ch --- In lpc2000@yahoogroups.com, "rtstofer" <rstofer@p...> wrote:
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> > Can I leave P0.7 as GPIO and ignore SSEL while using the SPI as a > master device only? > > I am seriously short of pins! > > Richard >
Re: LPC2106, SPI and SSEL
2005-10-21 by rtstofer
Thanks to all! OK, I'll just muddle through and pull SSEL high. When I get a little further along I'll just move up to the LPC2138. No big deal. Richard