Installation Instructions

L508 Hardware Design
Copyright© Shanghai Mobiletek Communication Ltd 4
4.4.3 Power Supply Design Guide .............................................. 38
4.4.4 Charging circuit design reference ......................................... 39
4.5 USIM card interface............................................................................................................................ 40
4.5.1 Pin Description .......................................................... 40
4.5.2 Electrical characteristics ................................................. 41
4.5.3 USIM card interface application ........................................... 41
4.6 PCM interface ...................................................................................................................................... 42
4.6.1 Pin Description .......................................................... 42
4.6.2 PCM timing.............................................................. 43
4.6.3 PCM interface application ................................................ 44
4.7 USB2.0 interface ................................................................................................................................. 45
4.7.1 Pin Description .......................................................... 45
4.7.2 USB interface application ................................................ 45
4.8 UART interface .................................................................................................................................... 46
4.8.1 Pin Description .......................................................... 46
4.8.2 UART interface application ............................................... 47
4.9 SPI interface......................................................................................................................................... 50
4.9.1 Pin Description .......................................................... 50
4.9.2 SPI reference design ..................................................... 50
4.9.3 LCD reference design .................................................... 51
4.10 I2C interface....................................................................................................................................... 52
4.11 Network light ..................................................................................................................................... 53
4.11.1 Pin Description ......................................................... 53
4.11.2 Interface application .................................................... 53
4.12 System Status Indication ............................................................................................................... 54
4.13 Flight Mode ........................................................................................................................................ 55
4.14 Forced USB download interface .................................................................................................. 55
4.14.1 Pin Description ......................................................... 55
4.14.2 Forced USB download interface application .............................. 56
4.15 SD card interface .............................................................................................................................. 56
4.15.1 Pin Description ......................................................... 56
4.15.2 SD card reference design ............................................... 57
4.16 SDIO_WIFI/EMMC interface ........................................................................................................... 58
4.16.1 Pin Description ......................................................... 58
4.16.2 SDIO reference design .................................................. 58
4.17 PCIe interface .................................................................................................................................... 61
4.17.1 Pin Description ......................................................... 61
4.17.2 PCIe reference design .................................................. 62
4.18 RMII/RGMII interface ........................................................................................................................ 62
4.18.1 Pin Description ......................................................... 63
4.18.2 RMII/RGMII reference design ............................................ 63
4.19 AUDIO interface ................................................................................................................................ 66
4.19.1 Pin Description ......................................................... 67
4.19.2 AUDIO reference design ................................................. 67