Figure 5-26 Reference design of the MIC differential input ............................................................. 52
Figure 5-27 Reference design of audio interface in EAR/ SPK differential mode ........................... 54
Figure 5-28 Reference design of the external power amplifier connection ..................................... 55
Figure 5-29 Reference design of the headset interface ................................................................... 56
Figure 5-30 Headphone interface diagram ...................................................................................... 57
Figure 5-31 L-type network .............................................................................................................. 60
Figure 5-32 T-type network .............................................................................................................. 60
Figure 5-33 π-type network .............................................................................................................. 60
Figure 5-34 Recommended RF PCB design ................................................................................... 61
Figure 5-35 Murata RF connector encapsulation specifications ...................................................... 62
Figure 5-36 RF cable connections ................................................................................................... 62
Figure 5-37 Antenna layout .............................................................................................................. 63
Figure 5-38 Layout around the antenna ........................................................................................... 63
Figure 5-39 Process of entering into sleep mode ............................................................................ 66
Figure 5-40 Incoming call service process ....................................................................................... 66
Figure 5-41 Outgoing call service process ....................................................................................... 67
Figure 5-42 Process of existing from sleep mode ............................................................................ 67
Figure 5-43 Driving LED indicator with a triode ............................................................................... 68
Figure 5-44 Reference design of USB emergency download mode ................................................ 69
Figure 8-1 N715-EA top and side view dimensions (unit: mm) ........................................................ 76
Figure 9-1 Bottom view of N715-EA PCB package (unit: mm) ........................................................ 81
Figure 9-2 N715-EA application PCB package (top view, unit: mm) ................................................ 82
Figure 9-3 Oven temperature profile ................................................................................................ 84
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