I'm using a PIC16C84 to try to read the temperature from a Dallas DS1621 digital temperature IC via an I2C interface. I got the subroutines from a MICROCHIP application note (AN515). It is actually written for a PIC16C54, but I suppose it doesn't matter. I've managed to successfully access the configuration registers in the DS1621 and write commands and settings to them, but I can't get the PIC to read from the IC. No matter where I want it to read from, the recieved byte is always the same (01010101)!