Path: csiph.com!feeder.erje.net!2.us.feeder.erje.net!nntp.club.cc.cmu.edu!micro-heart-of-gold.mit.edu!bloom-beacon.mit.edu!bloom-beacon.mit.edu!panix!wb8foz From: David Lesher Newsgroups: sci.electronics.design Subject: Re: Output boards, SPI vs I2C Date: Tue, 28 Mar 2017 03:28:06 +0000 (UTC) Organization: NRK Clinic for habitual NetNews Abusers - Beltway Annex Lines: 17 Message-ID: References: NNTP-Posting-Host: panix5.panix.com X-Trace: reader1.panix.com 1490671686 9655 166.84.1.5 (28 Mar 2017 03:28:06 GMT) X-Complaints-To: abuse@panix.com NNTP-Posting-Date: Tue, 28 Mar 2017 03:28:06 +0000 (UTC) User-Agent: nn/6.7.3 Xref: csiph.com sci.electronics.design:453947 Martin Riddle writes: >>Is there a reason to use I2C over SPI? It looks like there are 8-channel >>boards of both ilks, and I don't know if one has an advantage in this case. >The OPEN PLC device does not indicate if the I2C and SPI busses are >brougth out to a connector. Thus you might be forced to bit bang the >OC digital outputs. They both do, but I'm not clear if the SPI has enough enable lines. -- A host is a host from coast to coast.................wb8foz@nrk.com & no one will talk to a host that's close.......................... Unless the host (that isn't close).........................pob 1433 is busy, hung or dead....................................20915-1433