Nexus S (I902x) UART¶

The Nexus S (I902x) allows accessing an UART serial port through the USB connector. A FSA9480 switch is in charge of switching the USB connector between UART and USB (among other choices).

According to the Nexus S (I902x) Schematics:

Depending on the resistor value between the USB connector ID and GND pins, the FSA9480 will automatically switch the USB connector to the selected device, as mentioned on the FSA9480 datasheet. A resistor value of 150k Ohm will switch the USB connector to UART.

Hardware setup¶

Software setup¶