Are you trying to use the CS as a framing signal?=20 I attempted that on a PIC24 using the SS signal and had to use external log= ic to get a signal that properly framed the data as the SS didn't de-assert= at the end of a frame. -----Original Message----- From: piclist-bounces@mit.edu On Behalf Of David = Van Horn Sent: 31 October 2019 15:30 To: Microcontroller discussion list - Public. Subject: [EE] PIC32 SPI port Is there any mechanism for automatically asserting and de-asserting /CS whe= n the PIC is the master? The chip I'm working with at the moment PIC32MX795F512L has a 4 deep FIFO o= n receive and transmit. I suspect I'll have to write an interrupt handler and deal with the /CS "ma= nually", but if there's some automatic mechanism I haven't found yet that w= ould be wonderful. -- David VanHorn Lead Hardware Engineer Backcountry Access, Inc. 2820 Wilderness Pl, Unit H Boulder, CO 80301 USA phone: 303-417-1345 x110 email: david.vanhorn@backcountryaccess.com -- http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/chang= e your membership options at http://mailman.mit.edu/mailman/listinfo/piclis= t --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .