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RF description ...................................................................................................................................................... 6–25

Block diagram................................................................................................................................................. 6–25

Receiver (RX)................................................................................................................................................... 6–25

Transmitter (TX) ............................................................................................................................................. 6–26

Frequency mappings........................................................................................................................................... 6–27

GSM850 frequencies....................................................................................................................................... 6–27

EGSM900 frequencies..................................................................................................................................... 6–27

GSM1800 frequencies..................................................................................................................................... 6–28

GSM1900 frequencies..................................................................................................................................... 6–30

WCDMA V (850) frequencies .......................................................................................................................... 6–31

WCDMA 2100 Rx frequencies......................................................................................................................... 6–32

WCDMA 2100 Tx frequencies ......................................................................................................................... 6–33

List of Tables

Table 14 Nominal voltages....................................................................................................................................6–8

Table 15 AV interface electrical characteristics................................................................................................ 6–22

Table 16 Charging interface connections ......................................................................................................... 6–24

Table 17 Charging IF electrical characteristics ................................................................................................. 6–24

Table 18 Back-up battery connections.............................................................................................................. 6–24

Table 19 Back-up battery electrical characteristics ......................................................................................... 6–25

List of Figures

Figure 35 Battery pin order...................................................................................................................................6–7

Figure 36 LYNX battery connector ........................................................................................................................6–7

Figure 37 Small (left) and wide (right) charger plugs ........................................................................................6–8

Figure 38 Clocking scheme................................................................................................................................. 6–11

Figure 39 Bluetooth interface............................................................................................................................ 6–12

Figure 40 FM interface ........................................................................................................................................ 6–12

Figure 41 SIM interface ....................................................................................................................................... 6–14

Figure 42 Camera flash and driver design ........................................................................................................ 6–16

Figure 43 Keyboard layout ................................................................................................................................. 6–17

Figure 44 Audio block diagram.......................................................................................................................... 6–19

Figure 45 Internal microphone circuitry........................................................................................................... 6–20

Figure 46 External earpiece and microphone circuitry (AV connected on the right) ................................... 6–20

Figure 47 Internal earpiece circuitry................................................................................................................. 6–21

Figure 48 Internal speaker circuitry .................................................................................................................. 6–21

Figure 49 External earpiece and microphone circuitry (AV connected on the right) ................................... 6–22

Figure 50 Vibra circuitry ..................................................................................................................................... 6–22

Figure 51 RF block diagram using RF ASIC N7505............................................................................................ 6–25

RM-243

System Module and User Interface

Page 6 –4 COMPANY CONFIDENTIAL Issue 1