Neoway N723-EA - Page 5

N723-EA Hardware User Guide
Table of Figures
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Table of Figures
Figure 2-1 Block diagram ................................................................................................................. 12
Figure 4-1 N723-EA pin definition (top view) ................................................................................... 16
Figure 5-1 Voltage drop of the power supply. .................................................................................. 26
Figure 5-2 Recommended design 1 ................................................................................................. 26
Figure 5-3 Recommended design 2 ................................................................................................. 27
Figure 5-4 Recommended design 3 ................................................................................................. 28
Figure 5-5 Recommended design 4 ................................................................................................. 29
Figure 5-6 Reference design of startup, shutdown, and reset controlled by a button ..................... 32
Figure 5-7 Reference design of startup, shutdown, and reset controlled by an MCU ..................... 32
Figure 5-8 Reference design of automatic start once powered up .................................................. 33
Figure 5-9 Startup process (by controlling PWRKEY_N)................................................................. 33
Figure 5-10 Startup process (by controlling PWRKEY) ................................................................... 34
Figure 5-11 Reset process of the module ........................................................................................ 35
Figure 5-12 Hardware shutdown process ........................................................................................ 36
Figure 5-13 Reference design of USB force download.................................................................... 36
Figure 5-14 Process of entering the sleep mode ............................................................................. 37
Figure 5-15 Process of exiting from sleep mode ............................................................................. 38
Figure 5-16 Incoming call service process ....................................................................................... 38
Figure 5-17 Outgoing call service process ....................................................................................... 39
Figure 5-18 Reference USB connection design ............................................................................... 40
Figure 5-19 Reference design of the UART connection .................................................................. 41
Figure 5-20 Recommended level shifting circuit 1 ........................................................................... 42
Figure 5-21 Recommended level shifting circuit 2 ........................................................................... 43
Figure 5-22 Recommended level shifting circuit 3 ........................................................................... 44
Figure 5-23 Reference design of the USIM card interface .............................................................. 45
Figure 5-24 Reference design of the USIM card (without hot-swap) interface ................................ 46
Figure 5-25 Reference design of the SDC interface ........................................................................ 47