Xiaofan Chen  wrote:
> However SPI will require 3 or  4 wires and I will need too many
> opto couplers because of the isolation requirement. So I am thinking of
> using serial communication. Looks like this is doable but pretty risky.
> I might be able to reduce the data to 3 bytes instead of 4 bytes.


UART baud rates: 906 kbaud for MCP2150 and MCP2155 IrDA(r) Protocol
Stack Controller

UART Baud Rates up to 1 Mbps for dsPIC30F1010/202X

With appropriate IrDA transceiver you can communicate at almost 1 Mbps.

Is not it enough for your app?

Regards,
MS
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