Neoway N21 Series Hardware User's Manual

Neoway N21 Series Hardware User's Manual Manual pdf 5 page image

N21Hardware User GuideCopyright © Neoway Technology Co., Ltd. All rights reserved. ivTable of FiguresFigure 1-1 Block Diagram .................................................................................................................. 2Figure 2-1 Pin definition of N21.......................................................................................................... 4Figure 3-1 Recommended circuit design 1 ........................................................................................ 8Figure 3-2 Recommended schematic design 2 ................................................................................. 9Figure 3-3 Reference design of startup controlled by button ............................................................ 11Figure 3-4 Reference design of startup controlled by MCU .............................................................. 11Figure 3-5 Reference design of automatic start once powered up ................................................... 11Figure 3-6 Startup timing .................................................................................................................. 12Figure 3-7 Shutdown timing ............................................................................................................. 13Figure 3-8 Reset controlled by button .............................................................................................. 13Figure 3-9 Reset circuit with triode separating ................................................................................. 14Figure 3-10 Reset timing of N21 ...................................................................................................... 14Figure 3-11 UART connection .......................................................................................................... 15Figure 3-12 Recommended level shifting circuit 1 ........................................................................... 16Figure 3-13 Recommended level shifting circuit 2 ........................................................................... 16Figure 3-14 Recommended level shifting circuit 3 ........................................................................... 18Figure 3-15 Reference design of USIM card interface..................................................................... 19Figure 3-16 L network ...................................................................................................................... 20Figure 3-17 T network ...................................................................................................................... 20Figure 3-18 Pi network ..................................................................................................................... 21Figure 3-19 Recommended RF PCB design ................................................................................... 21Figure 3-20 Specifications of MM9329-2700RA1 ............................................................................ 22Figure 3-21 RF connections ............................................................................................................. 22Figure 3-22 Reference design of WAKEUP ..................................................................................... 23Figure 3-23 Driving LED directly ...................................................................................................... 23Figure 3-24 Driving LED with a triode .............................................................................................. 24Figure 6-1 N21 dimensions (Unit: mm) ............................................................................................ 28