> I tried the 10k pull up resistor, it doesn't help.  
> 
> Additional info: I have SS pin enabled on both slaves

By enabled, do you mean +5V?

The SS pin *must* be low on one and only one of the slaves.

You must also put both the slave devices in a mode where they
listen to the SS (Slave Select) pin.

> --- "D. Jay Newman" <jay@sprucegrove.com> wrote:
> 
> > > I tried to sum the two SDO signals of the two
> > Slaves
> > > via 1K resistor, but the comm is still
> > intermittent. 
> > > Is there other anyway around this?  Thanks!
> > > Best regards,
> > 
> > I use 10k resisters for pull-ups and have not had
> > such problems.
> > -- 
> > D. Jay Newman           ! Polititions and
> > civilations come and
> > jay@sprucegrove.com     ! go but the engineers and
> > machinists 
> > http://enerd.ws/robots/ ! make progress
> > -- 
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> > http://mailman.mit.edu/mailman/listinfo/piclist
> > 
> 
> 
> 
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-- 
D. Jay Newman           ! Polititions and civilations come and
jay@sprucegrove.com     ! go but the engineers and machinists 
http://enerd.ws/robots/ ! make progress
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http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist