Tomahawk Headset Detection - Nokia RH-17 Series Troubleshooting - Bb

RH-17
Troubleshooting — BB
CH4 = PURX
In Channel 4, we can see that PURX is release and this is when the phone operation goes
from "RESET" mode to "POWER_ON" mode.

Tomahawk headset detection

Accessory detection on Tomahawk is done digitally. The pins uses for accessory detection
are:
Pin 2 (Charge GND)
Pin 3 (ACI)
Pin 4 (Vout)
A waveform of such detection can be seen in the following figure:
Page 24
Nokia Corporation
CCS Technical Documentation
Confidential Issue 1 04/2003