User Guide

RH-48

Troubleshooting — BB CCS Technical Documentation

The pin out on the Tomahawk connector is as follows:

1. Charger

2. Charger GND

3. ACI

4. Vout

5. USB Vbus

6. USB D+ / Fbus Rx

7. USB D- / Fbus Tx

8. Data GND

9. XMic N

10. XMic P

11. HSe ar N

12. HSear P

13. HSear R N

14. HSear R P

In Tomahawk accessories, the following functions may be performed: charging, accessory

detection, FBUS communication, USB communication, and fully differential audio inter-

face for mono- and stereo outputs.

Charging

Charging through the Tomahawk is accomplished in the same manner as through the

charger connector. Pin 1 of the Tomahawk is physically connected to the charger con-

nector. When the phone is connected to a desktop charger (e.g., DCV-15), it charges in

the same manner as it does with the charger connector.

The actual charging sequence is illustrated in the following diagram. The channels on the

diagram are:

CH1 = Charging current across the .22 Ohm (R200) resistor on UEMK

CH2 = Charger voltage measure at V100

CH3 = Battery voltage measure at R200

CH4 = PURX