I received my OLED module yesterday and it seems that the CS is already connected to ground on the board using a 0 ohm resistor. I verified this by multimeter across CS and GND. Regards, Chetan Bhargava http://microz.blogspot.com On Wed, Aug 15, 2012 at 11:57 AM, Robert Rolf wro= te: > In past devices I've saved a pin and sitll used /CS by pulling it low wit= h > a diode to clk, and a R pullup and C that raises /CS after about 4 clock > periods. I set clock pol/pha to keep clk high after a transaction, > but still provide rising edges to clock in the data. > Most devices are ok with slightly sloppy /CS rise time. If not, square it > up with a couple of SOT23 74HC14 devices. > > R > > On Wed, Aug 15, 2012 at 9:22 AM, Michael Rigby-Jones < > Michael.Rigby-Jones@oclaro.com> wrote: > >> On Tue, Aug 14, 2012 at 8:39 PM, Harold Hallikainen < >> harold@hallikainen.org> wrote: >> >> >> >> I've heard of this being done, but I've always wondered how you tell >> >> which bit is which. With CSn, the msb is clearly the first bit after >> >> CSn goes low. If CSn is always low, how do you know which bit is whic= h? >> >> >> >> Harold >> >> >> >> >-----Original Message----- >> >From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behal= f >> Of Chetan Bhargava >> >Sent: 15 August 2012 16:01 >> >To: Microcontroller discussion list - Public. >> >Subject: Re: [EE] SPI OLED CS signal >> > >> >Data and clock pair are independent of CS. You keep the data clocking >> >routine the same irrespective of CD connected to micro or tied low. >> > >> >Chetan Bhargava >> >> You may be able to do this as long as the SPI slave device does not rely >> on the rising edge of the CS pin to load any internal registers (many/mo= st >> SPI peripherals do). However, the downside is that a single glitch on t= he >> clock line will irretrievably lose the synchronisation between the slave >> and the master. >> >> Regards >> >> Mike >> >> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D >> This e-mail is intended for the person it is addressed to only. The >> information contained in it may be confidential and/or protected by >> law. If you are not the intended recipient of this message, you must >> not make any use of this information, or copy or show it to any >> person. Please contact us immediately to tell us that you have >> received this e-mail, and return the original to us. Any use, >> forwarding, printing or copying of this message is strictly prohibited. >> No part of this message can be considered a request for goods or >> services. >> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D >> >> -- >> http://www.piclist.com PIC/SX FAQ & list archive >> View/change your membership options at >> http://mailman.mit.edu/mailman/listinfo/piclist >> >> > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .