User Guide

CCS Technical Documentation System Module and User Interface

NSB-9

Issue 1 04/03 Nokia Corporation Page 33

System Connector

Table 24: DC- and System Connector features

Figure 6: Charger plug socket and System Connector

External accessory regulator

An external regulator is needed for accessory power supply purposes. All ACI accessories

are requiring this power supply. Regulator input is connected to main battery voltage

VBAT and output is connected to System Connector VOUT pin. Regulator ON/OFF func-

tion is controlled with UPP GenI/O 0.

Table 25: Accessory Regulator Signals

Function Notes

Charging Pads for 2-wire charging in cradles

Audio - 4-wire fully differential stereo audio output

- 2-wire differential microphone input

Power supply for accessories 2.78V/70mA output to accessories

FBUS Standard FBUS

Signal Min Nom Max Note

Vout 2.70V 2.78 2.86V Imax = 150mA

GenIO(0) 1.4 1.8 1.88

0.6

High (ON)

Low (OFF)

Fbus T

Fbus R

PWB

XMIC

XMI

ACI

Char

Shieldin

GND

HSEAR

Shieldin

GND

HSEAR

Char

Vout