User Guide

RF description.......................................................................................................................................................8–22
Introduction to receiver functionality...........................................................................................................8–22
GSM receiver.....................................................................................................................................................8–22
Introduction to transmitter functionality.....................................................................................................8–22
GSM transmitter...............................................................................................................................................8–23
GSM FEM (front end module)..........................................................................................................................8–23
Frequency synthesizers..................................................................................................................................8–23
Regulators........................................................................................................................................................8–24
Frequency mappings............................................................................................................................................8–24
GSM850 frequencies........................................................................................................................................8–24
EGSM900 frequencies......................................................................................................................................8–25
GSM1800 frequencies......................................................................................................................................8–26
GSM1900 frequencies......................................................................................................................................8–27
List of Tables
Table 13 Battery interface connections.............................................................................................................8–11
Table 14 Audio connector pin assignments......................................................................................................8–18
Table 15 Charging interface connections..........................................................................................................8–20
Table 16 Charging IF electrical characteristics..................................................................................................8–20
Table 17 Battery interface connections.............................................................................................................8–20
Table 18 Battery IF electrical characteristics.....................................................................................................8–20
Table 19 Back-up battery connections...............................................................................................................8–22
Table 20 Back-up battery electrical characteristics..........................................................................................8–22
List of Figures
Figure 53 System level block diagram..................................................................................................................8–6
Figure 54 RM-198 baseband functional block diagram......................................................................................8–7
Figure 55 MR sensor connection...........................................................................................................................8–9
Figure 56 Battery pin order.................................................................................................................................8–11
Figure 57 Main display LCD module....................................................................................................................8–12
Figure 58 Cover display LCD module...................................................................................................................8–13
Figure 59 Audio block diagram...........................................................................................................................8–15
Figure 60 Internal microphone circuitry............................................................................................................8–15
Figure 61 Internal earpiece circuitry..................................................................................................................8–16
Figure 62 Internal speaker circuitry...................................................................................................................8–16
Figure 63 External earpiece circuitry (Pop-Port connected on the right).......................................................8–17
Figure 64 Vibra circuitry......................................................................................................................................8–17
Figure 65 External audio connector...................................................................................................................8–18
Figure 66 Battery connector................................................................................................................................8–20
Figure 67 GSM transmitter...................................................................................................................................8–23
RM-198
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