On the MAX32620FTHR, only the I2CM2 (P5_7/P6_0) has built-in pull-ups. The other ports do not! You have to use 4.7kOhm to 1.8V or 3.3V to utilize the other I²C buses.
On the MAX32620FTHR, only the I2CM2 (P5_7/P6_0) has built-in pull-ups. The other ports do not! You have to use 4.7kOhm to 1.8V or 3.3V to utilize the other I²C buses.