Charging - Nokia RH-27 Series Technical Documentation Manual

CCS Technical Documentation
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 HSear N
12 HSear P
13 HSear R N
14 HSear R P
In Tomahawk accessories, perform the following functions: Charging, Accessory detec-
tion, FBUS communication, USB communication, and fully differential audio interface for
mono and stereo outputs. These modes are explained in the following sections.

Charging

Charging through the Tomahawk is done same way as through the charger connector.
Pin 1 of the Tomahawk is physically connected the charger connector. So when the
phone is connected to the desktop charger such as the DCV-15, it is charged the same
way as is done on the charger connector.
The actual charging sequence can be seen in the following figure. The channels on the
figure are as follows:
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
Issue 1 11/2003 Confidential
©2003 Nokia Corporation
Troubleshooting - Baseband
RH-27
Page 31