System Connector; External Accessory Regulator - Nokia NSB-9 Service Manual

CCS Technical Documentation

System Connector

Function
Charging
Audio
Power supply for accessories
FBUS

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.
Signal
Vout
GenIO(0)
Issue 1 04/03
Table 24: DC- and System Connector features
Notes
Pads for 2-wire charging in cradles
- 4-wire fully differential stereo audio output
- 2-wire differential microphone input
2.78V/70mA output to accessories
Standard FBUS
Figure 6: Charger plug socket and System Connector
1
Table 25: Accessory Regulator Signals
Min Nom
2.70V 2.78
1.4 1.8
Nokia Corporation
System Module and User Interface
14
Max Note
2.86V Imax = 150mA
1.88 High (ON)
0.6 Low (OFF)
NSB-9
PWB
Page 33