Specifications

SIM7912&SIM7906 Hardware Design V1.02
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Contents
1 Introduction .......................................................................................................................................... 10
1.1 Product Outline .................................................................................................................................. 10
1.2 Hardware Block Diagram .................................................................................................................. 12
1.3 Feature Overview .............................................................................................................................. 12
2 Package Information ........................................................................................................................... 15
2.1 Pin Assignment Overview ................................................................................................................. 15
2.2 Pin Description .................................................................................................................................. 16
2.3 Mechanical Dimensions .................................................................................................................... 25
3 Interface Application ........................................................................................................................... 26
3.1 Power Supply .................................................................................................................................... 26
3.1.1 Power Supply Design Guide ....................................................................................................... 26
3.1.2 Recommended Power Supply Circuit ......................................................................................... 28
3.1.3 Voltage Monitor ........................................................................................................................... 29
3.2 Power On and Off Module ................................................................................................................. 29
3.2.1 Power On .................................................................................................................................... 29
3.2.2 Power Off .................................................................................................................................... 31
3.3 Reset Function .................................................................................................................................. 32
3.4 Output Power Management .............................................................................................................. 33
3.5 USB Interface .................................................................................................................................... 33
3.6 PCIe Interface.................................................................................................................................... 36
3.7 SDIO Interface ................................................................................................................................... 38
3.8 SIM Interface ..................................................................................................................................... 40
3.9 PCM and I2S Interface ...................................................................................................................... 42
3.9.1 I2S Timing ................................................................................................................................... 43
3.9.2 I2S Reference Circuit .................................................................................................................. 44
3.10 I2C Interface ................................................................................................................................... 45
3.11 UART Interface ............................................................................................................................... 46
3.12 SPI Interface ................................................................................................................................... 48
3.13 ADC Interface ................................................................................................................................. 48
3.14 GPIOs Interface .............................................................................................................................. 49
3.15 Network Status Indication ............................................................................................................... 49
3.16 Status Indication ............................................................................................................................. 50
3.17 Flight Mode Control ........................................................................................................................ 51
3.18 USB_BOOT Interface ..................................................................................................................... 52
3.19 Antenna Tuner Control Interface* .................................................................................................. 52
4 Antenna Interfaces .............................................................................................................................. 54
4.1 Antenna Definitions ........................................................................................................................... 54
4.1.1 3G/4G Operating Frequency....................................................................................................... 54
4.1.2 GNSS Frequency ........................................................................................................................ 57
4.2 Antenna Installation ........................................................................................................................... 57