Neoway N720 OpenLinux - Page 6

N720 OpenLinux
Hardware User Guide
Copyright © Neoway Technology Co., Ltd
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Figure 3-26 PCM connection ........................................................................................................... 37
Figure 3-27 PCM sync signal timing in primary mode ..................................................................... 37
Figure 3-28 PCM data input timing in primary mode ....................................................................... 37
Figure 3-29 PCM data output timing in primary mode ..................................................................... 37
Figure 3-30 PCM sync signal timing in auxiliary mode .................................................................... 38
Figure 3-31 PCM data input timing in auxiliary mode ...................................................................... 38
Figure 3-32 PCM data output timing in auxiliary mode .................................................................... 39
Figure 3-33 SPI connection .............................................................................................................. 40
Figure 3-34 SPI timing ..................................................................................................................... 41
Figure 3-35 I2Cconnection ............................................................................................................... 42
Figure 3-36 I2C data transmission ................................................................................................... 42
Figure 3-37 I2C timing ...................................................................................................................... 43
Figure 3-38 SGMII connection ......................................................................................................... 45
Figure 3-39 Connection between MDIO and PHY ........................................................................... 47
Figure 3-40 MDIO input timing ......................................................................................................... 47
Figure 3-41 MDIO output timing ....................................................................................................... 47
Figure 3-42 WLAN connection ......................................................................................................... 49
Figure 3-43 SDIO SDR timing .......................................................................................................... 50
Figure 3-44 SDIO DDR timing .......................................................................................................... 50
Figure 3-45 Bluetooth connection .................................................................................................... 52
Figure 3-46 L network ...................................................................................................................... 53
Figure 3-47 Split capacitor network.................................................................................................. 53
Figure 3-48 Pi network ..................................................................................................................... 54
Figure 3-49 Recommended RF PCB design 1 ................................................................................ 55
Figure 3-50 Recommended RF PCB design 2 ................................................................................ 55
Figure 3-51 GNSS RF structure ....................................................................................................... 55
Figure 3-52 Reference Design of Passive GNSS Antenna .............................................................. 56
Figure 3-53 Reference design of active GNSS antenna .................................................................. 57
Figure 3-54 Reference layout of GNSS antenna traces .................................................................. 58
Figure 3-55 Specifications of MM9329-2700RA1 ............................................................................ 59
Figure 3-56 RF connections ............................................................................................................. 59