Neoway N27, Hardware User'S Manual

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N27 Hardware User Guide
Figures
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Figures
Figure 2-1 Block diagram ................................................................................................................. 12
Figure 3-1 N27 pin definition ............................................................................................................ 15
Figure 4-1 Recommended power design ......................................................................................... 23
Figure 4-2 Reference design of startup controlled by button ........................................................... 24
Figure 4-3 Reference design of startup controlled by MCU ............................................................. 25
Figure 4-4 Startup timing .................................................................................................................. 25
Figure 4-5 Shutdown timing ............................................................................................................. 26
Figure 4-6 USB connection .............................................................................................................. 27
Figure 4-7 UART connection ............................................................................................................ 28
Figure 4-8 Recommended level shifting network ............................................................................. 29
Figure 4-9 Reference design of the SIM card interface ................................................................... 30
Figure 4-10 PCM connection ........................................................................................................... 31
Figure 4-11 PCM sync signal timing ................................................................................................. 32
Figure 4-12 PCM data input timing .................................................................................................. 32
Figure 4-13 PCM data output timing ................................................................................................ 32
Figure 4-14 I2S connection .............................................................................................................. 34
Figure 4-15 I2S timing ...................................................................................................................... 34
Figure 4-16 SPI connection .............................................................................................................. 35
Figure 4-17 SPI timing ..................................................................................................................... 36
Figure 4-18 Reference design of the I2C interface .......................................................................... 37
Figure 4-19 Pi network ..................................................................................................................... 38
Figure 4-20 Recommended RF PCB design ................................................................................... 38
Figure 4-21 GNSS RF structure ....................................................................................................... 39
Figure 4-22 Specifications of MM9329-2700RA1 ............................................................................ 40
Figure 4-23 RF connections ............................................................................................................. 40
Figure 4-24 Antenna layout .............................................................................................................. 41
Figure 4-25 Layout around the antenna ........................................................................................... 41