N58 Hardware User Guide
Figures
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Figures
Figure 2-1 Block diagram ................................................................................................................. 14
Figure 4-1 Pin layout of the N58 module (top view) ......................................................................... 18
Figure 5-1 Voltage drop of the power supply ................................................................................... 29
Figure 5-2 Recommended design 1 ................................................................................................. 29
Figure 5-3 Recommended design 2 ................................................................................................. 30
Figure 5-4 Recommended design 3 ................................................................................................. 31
Figure 5-5 Recommended design 4 ................................................................................................. 31
Figure 5-6 Reference design of module startup controlled by button .............................................. 34
Figure 5-7 Reference design of module startup controlled by MCU ................................................ 34
Figure 5-8 Reference design of automatic startup once powered on .............................................. 35
Figure 5-9 Startup process ............................................................................................................... 36
Figure 5-10 Hard shutdown process ................................................................................................ 36
Figure 5-11 Module reset controlled by button ................................................................................. 37
Figure 5-12 Reference reset circuit in which a triode is used for isolation ...................................... 37
Figure 5-13 Reset process of the N58 module ................................................................................ 38
Figure 5-14 Process of entering the sleep mode ............................................................................. 39
Figure 5-15 Process of call service processing in sleep mode ........................................................ 39
Figure 5-16 Process of exiting from the sleep mode ....................................................................... 40
Figure 5-17 Reference design of the module sleep and wake-up control circuit ............................. 41
Figure 5-18 Reference design of the USB connection circuit .......................................................... 42
Figure 5-19 Reference design of UART connections ...................................................................... 44
Figure 5-20 Recommended level shifting circuit 1 ........................................................................... 44
Figure 5-21 Recommended level shifting circuit 2 ........................................................................... 45
Figure 5-22 Recommended level shifting circuit 3 ........................................................................... 46
Figure 5-23 Reference design of USIM card (with the hot plug function) interfaces ....................... 47
Figure 5-24 Reference design of USIM card (without the hot plug function) interfaces .................. 48
Figure 5-25 SDIO reference design ................................................................................................. 49
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