Hello
I was communicating a 24C64A eeprom(from Atmel) with an MSP430F169 MCU. When I connect my DC power supply (3.3V) with ground connected to the ground, chip selects and write protect pins of the eeprom, the eeprom doesn't work. The I2C doesn't get ready for a read access, but it seems it can write data. However when I connect the reference voltage connector(or shall I say ground) of an oscilloscope everything works fine. I2C gets ready, writes and reads data as expected. But just after I disconnect the reference voltage connector of the oscilloscope, eeprom doesn't respond from I2C.
What might be the problem?
I'll be very appreciated if anyone could help me,
Taskin
I was communicating a 24C64A eeprom(from Atmel) with an MSP430F169 MCU. When I connect my DC power supply (3.3V) with ground connected to the ground, chip selects and write protect pins of the eeprom, the eeprom doesn't work. The I2C doesn't get ready for a read access, but it seems it can write data. However when I connect the reference voltage connector(or shall I say ground) of an oscilloscope everything works fine. I2C gets ready, writes and reads data as expected. But just after I disconnect the reference voltage connector of the oscilloscope, eeprom doesn't respond from I2C.
What might be the problem?
I'll be very appreciated if anyone could help me,
Taskin