Hi,

I am making a circuit using an 18F4520 PIC and want to make sure that I am connecting the SPI connections correctly.
I think MOSI=SDO PIN24 MISO=SDI PIN23 and guess that CS can be connected anywhere? Does the SCK PIN output the Crystal frequency? If so which PIN and how do I set it up please?
Camerart.

 

That is not necessarily correct in all cases, particularly when the device can be either a master or slave.

From Wikipedia:

The MOSI/MISO convention requires that, on devices using the alternate names, SDI on the master be connected to SDO on the slave, and vice versa.

Is the PIC master or slave?

John

 

hi C,
I have clipped this image from my SD circuit, it shows the the SPI connections.
E

 

Hi Both,
Eric's image explains it, thanks.

EDIT: (Not Eric's image exactly, but the one he posted)
C.