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
X
Fbus
R
X
PWB
XMI
C
XMI
C
AC
I
Ch
ar
ge
NC
NC
S
hi
eld
in
g
GN
D
HSE
A
R
HS
E
A
R
S
hi
eld
in
g
GN
D
HSE
A
R
R
HSE
A
R
R
Ch
ar
ge
Vo
ut
1
14
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