Nokia NSB-5 Series Technical Documentation Manual page 11

PAMS Technical Documentation
IB-
Pin NAME Function
pin
8 Yes XMIC Analog
audio input
(from
accessory
to phone)
Headset
micro-
phone
input (from
accessory
to phone)
Accessory
mute. Volt-
age com-
pared to
SGND.
(from
phone to
accessory)
Headset
detection
(from
accessory
to phone)
(NO TAG)
Function
DLR-3
Datacable
Detection
9 Yes SGND Audio sig-
nal ground.
Separated
from
phone GND
(from
phone to
accessory)
Issue 1 03/01
Table 3: System/IBI connector
Min Typ Max Unit
2.0 2.2 kΩ
Ω
100
1 V
p-p
2.0 2.2 kΩ
2.5 kΩ
µA
100 600
200 mV
p-p
2.5 2.9 V
0 1.55 V
1.6 2.0 2.4 V
1.47 2.9 V
0 1.33 V
49 kΩ
440 733 mV
Ω
47
µF
10
Ω
380
100 kΩ
-0.2 +0.2 V
-5 +5 V
Nokia Mobile Phones Ltd.
System Module
Description
Input AC impedance
Accessory source AC impedance
Maximum signal level
Input AC impedance
Headset source AC impedance
Bias current
Maximum signal level
Not muted
Muted, without headset
Comparator reference in accessory
No headset (ref SGND)
Headset connected (ref SGND)
Pull-up resistor to VBB in phone
DLR-3 detected (ref SGND)
Output AC impedance (ref GND)
Series output capacitance
Resistance to phone ground (DC)
(in phone)
Resistance to accessory ground (in
accessory)
DC voltage compared to phone
GND
DC voltage compared to accessory
GND
NSB-5
Page 11