User Guide

Nokia Customer Care Baseband Description and Troubleshooting
6255/6255i6256/6256i (RM-19)
Issue 2 05/2005 ©2005 Nokia Corporation Company Confidential Page 37
Pop-port Headset Detection
Accessory detection on the Pop-port is done digitally. The pins used for this accessory
detection are:
• Pin 2 (Charge GND)
• Pin 3 (ACI)
•Pin 4 (Vout)
Figure 24: Waveform showing Pop-port accessory detection
FBus Detection
FBus communication in Pop-port is done through the following lines:
• Pin 2 (Charge GND)
• Pin 3 (ACI)
•Pin 4 (Vout)
• Pin 6 (FBus Rx)
• Pin 7 (FBus Tx)