Serial port

There is an in-depth article covering several Samsung devices in the SamsungSerial page


Device I/O voltage ID<->GND SOC TX SOC RX switch Comments
I9300 1.8V1 619kOhms D- D+ It gives a shell once Replicant has booted
Nexus S 150 kOhm FSA9480
Galaxy Nexus
Optimus Black N/A2 DP3T

1 Measured between USB GND and USB VCC

2 Code is required to use the switch as you need to configure both the MUIC and DP3T switch