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Transceiver required for SMC2 on MPC821?
- To: ecos-discuss at sourceware dot cygnus dot com
- Subject: [ECOS] Transceiver required for SMC2 on MPC821?
- From: Jamie Guinan <guinan at bluebutton dot com>
- Date: Tue, 19 Oct 1999 22:29:34 -0400 (EDT)
- cc: Witek <witek at ultranet dot com>
- Reply-To: guinan at bluebutton dot com
Hi all,
I'm trying to get output from the SMC2 port on my
MBX board (MPC821).
Is it necessary to put a transceiver between the SMC2
pins and the serial cable if you want to talk to an
RS-232 port at the other end? The SMC2 Tx/Rx, and GND
pins are available at header J1, but I had no
luck wiring them up to a serial port. Maybe the
821 can't drive the RS-232 voltages?
(This not eCos-specific, but I'm using eCos and there
seem to be other MBX users around here so I figured
I'd ask anyway.)
-Jamie
p.s. Hugo helped get the SMC2 configuration working
a few weeks ago - that much appears to be working.
Thanks, H.