I have a chip that should hold some calibration data. I expected to be a EEPROM but it looks like it is not a classic EEPROM. This is how it is connected.
I think it is clear that pins 4 and 8 (or 1) are power pins and pins 5 and 7 are for communication. But what communication? All I2C EEPROMs I have found datasheet of have I2C pins on pins 5 and 6. I have tried I2C protocol anyway but didn’t get any response. I have thought about SPI but just two data lines are strange. Morover why there may be the resistors?
So do you have any idea how it could communicate? Or any hint how I can I find the protocol (without hijacking the original communication)?