Need CRC for RF PIC2PIC Bit arrayed interface

[SteveB]

Is the Serin2/Serout2 reliable on 628A@internal 4Mhz?

Haven't used that chip, but see this post by Melanie on just that issue. YMMV.

The ADC is MAX148 10bit 8ch internal (or ext) clock (max 2Mhz),
SPI interface.
After I send the control Byte to its input.
It starts the conv, then it sends out(shifts out by its clk) the selected
channel value. Can I catch this data with something else than pulsin 1?

You should use PBP's SHIFTIN/SHIFTOUT with a SPI interface. No experiance with that particular ADC, but lots of folks (myself included) use SHIFTIN/SHIFTOUT with great success. You have to choose the correct "mode", but then it works a treat.

Also, unless there is some unkown reason, why not select a PIC with ADC on board? Its surely going to be cheaper than the seperate MAX ADC, and no comm hassle. Lots of options to choose from: A quick search yielded 134 with 8 or more 10 bit ADC Channels.

Steve