USB2PMB2# Vs USB2PMB1# What is the differnce?
USB2PMB1# is SPI only (no I2C support).
USB2PMB2# adds I2C support…
And you will see the difference on the USB connector, the USB2PMB1 has a mini-USB connector, the USB2PMB2 has a micro-USB connector. (In addition to that it should be printed on the PCB…)