User Guide

CCS Technical Documentation Troubleshooting — BB

RH-48

FBus Detection

FBus communication in Tomahawk is done through the following lines:

Pin 2 (Charge GND)

Pin 3 (ACI)

Pin 4 (Vout)

Pin 6 (FBus Rx)

Pin 7 (FBus Tx)

A waveform for such communication is illustrated here:

Accessory Detection Through ACI

USB and Audio on (mono or stereo) and FM radio communication in Tomahawk is done

through the following signals:

USB Audio/FM

Pin 5 (USB Vbus) Pin 9 (XMic N)

Pin 6 (USB +) Pin 10 (SMIC P)

Pin 7 (USB -) Pin 11 (HSEAR N)

Pin 8 (Data GND) Pin 12 (HSEAR P)

Pin 13 (HSEAR R N)

Pin 14 (HSEAR R P)