Not one reply, so I will ask again. Help please. Any clues will do. I seem to have a problem with 2 of my I2C chips. After receiving help = from Andy Stubbins I now have the 877 talking to my 24LC65 Eeprom via = the I2C MSSP.=20 The clock and thermometer chips do not respond. The I2C pcb was moved = from a 16F84 test pcb to the 877 test pcb so I know it works. I wondered = if the other chips do not support 400Khz mode so I changed to 100Khz. I = started the '877 at 20Mhz but changed to 4Mhz adjusting the setup as I = went. I now have 2 pluggable xtals. They both work OK, 877 starts, LCD = displays a message from eeprom .=20 I am using 22k pull-ups and have added 2 more in parallel to reduce the = resistance and test the signal rise time. I used converted code, pin = bashing the I2C pins to test the electronics which worked. Any ideas why = these other two chips do not respond?? Thanks in advance. Chris Chamberlain. -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu