Hi, If this is a re-post I am sorry, I didn't receive a copy of it through the list or any replies, so I thought that it might have been lost. I was wondering if anyone has used a 12C509, 12C672, or any other 8-pin PIC as a serial peripheral interface (SPI) in slave mode. I am currently working on a project which is going to use either a 12C509 or if needed a 12C672. I want to communicate with it using the SPI protocol from another PIC which will be a 16C73 (or possibly a Motorola part), which will be in master mode. If anyone has any code, that they wouldn't mind sharing with me, that is for a 509, 672 or even a 16F84 without using interrupts, that would be great. Or if there is a web site out there with this info on it, that would be great also. Thanks a lot, Timothy Deterly