Tomahawk Headset Detection - Nokia RH-27 Series Technical Documentation Manual

RH-27
Troubleshooting - Baseband
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 used 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:
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©2003 Nokia Corporation
CCS Technical Documentation
Confidential Issue 1 11/2003