I'm planning on I2C between 3 PIC subsystems; 2 of these run at 4MHz XT, =
the other at 20MHz XT.  Is there anything I should be paying any special =
attention to, such as the Baud Rate Generator setup?  My take on it is =
that the I2C Master simply drives everything at its established bit =
rate, and the slave(s) just need to "conform" to it.   In this design, =
the 20MHz PIC will always be the Master, and the others slaves (at =
least, that's how I see it *functionally*: the slaves won't ever need to =
asynchronously initiate communication with the master, per my protocol =
definition).   But when my Master wants to request data from one of the =
slaves, do they need to switch (I2C) roles to actually do the transfer?  =
That's one thing I can't seem to understand about I2C.
(The only devices I've used with the PIC Master so far have been I2C =
EEPROMs).
If these questions are too vague, I can supply more details, but given =
previous threads on the PIC as I2C "slave" topic, I'm wondering if I'm =
heading down an impossible path?
p.s. all devices in this design are 16F873's.
Thanks!
Jim

--
http://www.piclist.com hint: To leave the PICList
mailto:piclist-unsubscribe-request@mitvma.mit.edu