User Guide

Name of Connection Connector reference Notes
Vibra M2100
Microphone B2100
Earpiece B2101
IHF speaker B2102
Keyboard interface electrical characteristics
Description Parameter Min Typ Max Unit Notes
High-level
input voltage
(VIO = 1.8V)
VIH 0.65x VIO VIO 0.3+
VIODDS
V Row
Low-level input
voltage
VIL -0.3 0 0.35x VIO V Row
High-level
output voltage
VOH VIO- 0.45 VIO VIO + 0.3 V Column
Low-level
output voltage
VOL -0.3 0 0.35xVIO V Column
Back-up battery interface connections and electrical characteristics
Table 25 Back-up battery connections
Pin name I/O Connection Notes
VBack -> N2200,
VBack
Back-up battery G2200 is
connected to N2200 via coil
Table 26 Back-up battery electrical characteristics
Description Parameter Min Typ Max Unit
Back-Up
Battery
Voltage
Vback 0 2.5 2.7 V
RF description
Introduction to receiver functionality
Receiver functions are implemented in RF ASIC N7505.
The receiver is a linear direct conversion receiver consisting of separate front ends (LNA (Low Noise Amplifier)
and demodulator) for each supported system. After the demodulators, the signal paths are combined to one
common BB path.
GSM receiver
As GSM850, GSM900, GSM1800, GSM1900 Rx branches are functionally identical, the following description is
applicable to all of them.
RM-170; RM-171
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