NexusSI902xSerial » History » Revision 3
Revision 2 (Paul Kocialkowski, 01/16/2015 02:57 PM) → Revision 3/20 (Paul Kocialkowski, 02/12/2015 09:03 AM)
h1. Nexus S (I902x) UART The Nexus S (I902x) allows accessing an UART serial port through the USB connector. A The 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 USB. The Linux kernel will detect resistor value values 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. pins and act accordingly. A particular resistor value of 150k Ohm will switch the USB connector to UART. h2. Hardware setup h2. Software setup