merkin
Newbie level 3
Without getting into specifics, i have a simple question.
If i remove the pullup resistors of I2C bus lines should i still be getting a voltage reading on those same I2C bus lines when the entire circuit is powered.
The I2C bus is pulled up to 3v via 2k2 resistors. but when i remove the resistors i still get ~2.8vdc when the entire board is powered. Is this right? I understand the I2C bus lines are open drain. could they be floating that high or is it more likely that one of the three I2C devices in the circuit are fried and outputing volts on its sdc or scl pin?
Thanks in advance.
If i remove the pullup resistors of I2C bus lines should i still be getting a voltage reading on those same I2C bus lines when the entire circuit is powered.
The I2C bus is pulled up to 3v via 2k2 resistors. but when i remove the resistors i still get ~2.8vdc when the entire board is powered. Is this right? I understand the I2C bus lines are open drain. could they be floating that high or is it more likely that one of the three I2C devices in the circuit are fried and outputing volts on its sdc or scl pin?
Thanks in advance.