I am trying to get this FRAM memory to work but I do not have any luck getting an ACK. Attached scope output
Link to datasheet: RAMTRON chips
Using a tiny45, 5V battery (not connected to STK500 during test)
2.2k resistors pullups on buss, Pins PB0 and PB1 connected to SCL SDA
Pins 0,1,2,3 and 6 on FRAM to ground (device = 0 and no write protect)
From what I can see on the scope it looks like it should work.
Using the ATMEL I2C assembler code I found on this site. I changed D to B for port addressing
Anything look like it is a problem?