At 12:19 PM 4/14/2004 -0700, you wrote: >I personally don't think the device with common SDI/SDO line be called >"SPI-Compatiable". >Thomas >Rick Regan wrote: > > >So the device (with the common SDI/SDO line) must be >accessed "half duplex", as opposed to SPI, which clocks >data in/out on the same pulse? Is this really SPI then? There are often surprises when SPI is involved- consider the designer I took over from who wired up the SDO on a Burr-Brown DAC to the SDI on a PIC18F8520. Unfortunately, for him, the SDO on that part was intended for daisy-chaining only, and was therefore not tristated when the /CS was released. Time for Mr. Trace to meet Mr. X-acto (or Ms. Dremel). Best regards, Spehro Pefhany --"it's the network..." "The Journey is the reward" speff@interlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body