Author Topic: daughter board pinout sbc65ec vs sbc66ec  (Read 2187 times)

Danchoi-955

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daughter board pinout sbc65ec vs sbc66ec
« on: July 27, 2011, 12:35:10 PM »

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The sbc66ec does not look like a drop in replacement for the sbc65ec.  After digging further, I also found that the schematic (sbc66ec-r1) incorrectly shows CON1.  CON2 is as described, but not CON1.  See the attachment for the actual pin description of CON1.  Note that there are no connections on pins 3 thru 6, and pins 15 and 17 are the same, as well as pins 16 and 18.  I was using the rs232 port (sig0 and sig1), too bad that's no longer available.
« Last Edit: May 31, 2012, 05:31:39 PM by modtro2 »

Danchoi-955

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Re: daughter board pinout sbc65ec vs sbc66ec
« Reply #1 on: August 03, 2011, 09:35:28 AM »
There are actually two schematic PDF's, dated 19/01/2011 and 24/04/2011.  The latter dated PDF is accurate and does confirm my previous post for the "daughter board connections" on page 3.  Sorry if this confused anyone.  Again this is not 100% drop in replacement due to absent pins and duplicate pins at CON1.  Additionally, consider too that it's 3.3vdc logic for both digital and analog I/O's.  The PIC24FJ256GB206 have specific pins that are 5.5vdc tolerant digital inputs, and the SBC66EC have eight jumpers for 5vdc compatible digital outputs.  If you have HC devices, consider swapping to HCT equivalent parts.  So far, I love the new board and the robust Microchip TCP/IP stack, but the 3.3v logic limits my compatibility through the daughter board connections.