User Guide

RF description.......................................................................................................................................................9–23
Introduction to receiver functionality...........................................................................................................9–23
GSM receiver functionality..............................................................................................................................9–24
Introduction to transmitter functionality.....................................................................................................9–24
GSM transmitter functionality........................................................................................................................9–24
Frequency synthesizers..................................................................................................................................9–25
Regulators........................................................................................................................................................9–25
Frequency mappings............................................................................................................................................9–26
EGSM900 frequencies......................................................................................................................................9–26
GSM1800 frequencies......................................................................................................................................9–27
GSM1900 frequencies......................................................................................................................................9–28
List of Tables
Table 12 MicroSD Interface..................................................................................................................................9–11
Table 13 Audio connector pin assignments......................................................................................................9–18
Table 14 SIM IF connections................................................................................................................................9–18
Table 15 Charging interface connections..........................................................................................................9–19
Table 16 Charging IF electrical characteristics..................................................................................................9–19
Table 17 Battery interface connections.............................................................................................................9–19
Table 18 Battery IF electrical characteristics.....................................................................................................9–20
Table 19 Back-up battery connections...............................................................................................................9–23
Table 20 Back-up battery electrical characteristics..........................................................................................9–23
List of Figures
Figure 68 System level block diagram..................................................................................................................9–5
Figure 69 RM-86 functional block diagram..........................................................................................................9–6
Figure 70 Clocking scheme....................................................................................................................................9–8
Figure 71 MicroSD reader pins............................................................................................................................9–11
Figure 72 Battery pin order.................................................................................................................................9–12
Figure 73 LCD module..........................................................................................................................................9–13
Figure 74 RM-86 keyboard matrix......................................................................................................................9–14
Figure 75 Audio block diagram...........................................................................................................................9–15
Figure 76 Internal microphone circuitry............................................................................................................9–15
Figure 77 Internal earpiece circuitry..................................................................................................................9–16
Figure 78 External earpiece circuitry (Pop-Port connected on the right).......................................................9–16
Figure 79 Vibra circuitry......................................................................................................................................9–17
Figure 80 External audio connector...................................................................................................................9–17
Figure 81 Charger connector...............................................................................................................................9–19
Figure 82 Battery connector................................................................................................................................9–19
Figure 83 Keyboard PWB.....................................................................................................................................9–22
Figure 84 GSM transmitter...................................................................................................................................9–24
RM-86
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