Specifications

Smart Machine Smart Decision
SIM5800_Hardware Design_V1.01 3 2018-10-08
Contents
Contents .................................................................................................................................................................... 3
Table Index ............................................................................................................................................................... 5
Figure Index ............................................................................................................................................................. 6
Version History ........................................................................................................................................................ 7
1. Introduction ................................................................................................................................................... 8
2. Overview ........................................................................................................................................................ 8
2.1 Key Feature .............................................................................................................................................. 9
2.2 Functional Diagram .................................................................................................................................11
3. Pin definitions .............................................................................................................................................. 12
3.1 Pin Assignment ....................................................................................................................................... 12
3.2 Pin Description ....................................................................................................................................... 13
3.3 Physical dimension ................................................................................................................................. 19
4. Interface Application .................................................................................................................................. 21
4.1 Power Supply .......................................................................................................................................... 21
4.1.1 Power Supply Pins .............................................................................................................................. 22
4.2 Power on/off ........................................................................................................................................... 22
4.2.1 Power on ............................................................................................................................................. 22
4.2.2 Power off ............................................................................................................................................. 23
4.2.3 Reset Function ..................................................................................................................................... 23
4.3 VRTC ..................................................................................................................................................... 24
4.4 Power output---LDO ............................................................................................................................... 25
4.5 USB interface ......................................................................................................................................... 27
4.5.1 USB HOST ......................................................................................................................................... 28
4.6 Charge management ............................................................................................................................... 28
4.6.1 Charger detection ................................................................................................................................ 29
4.6.2 Charging Control ................................................................................................................................. 29
4.7 UARTs .................................................................................................................................................... 30
4.8 SD card ................................................................................................................................................... 31
4.9 LCD interface ......................................................................................................................................... 32
4.10 Touch panel interface ............................................................................................................................. 33
4.11 Camera interface ..................................................................................................................................... 33
4.12 Audio Interface ....................................................................................................................................... 34
4.12.1 Receiver Interface ............................................................................................................................ 35
4.12.2 MIC Interface ................................................................................................................................... 36
4.12.3 Headset ............................................................................................................................................ 36
4.12.4 Speaker Interface ............................................................................................................................. 38
4.12.5 Microphone Bias .............................................................................................................................. 38
4.13 USIM Card ............................................................................................................................................. 39
4.14 ADC ........................................................................................................................................................ 40
4.15 Motor Interface ....................................................................................................................................... 40
4.16 ISINK ..................................................................................................................................................... 40
4.17 GPIO ....................................................................................................................................................... 41
4.18 Keypad interface ..................................................................................................................................... 41
4.19 Antenna Interface ................................................................................................................................... 42
4.19.1 MAIN Antenna reference circuit ..................................................................................................... 42
4.19.2 GNSS Antenna reference circuit ...................................................................................................... 43
4.19.3 WIFI/BT antenna ............................................................................................................................. 44
5. PCB Layout Guide ...................................................................................................................................... 45
5.1 Stack-up Options .................................................................................................................................... 45
5.2 PCB Layout ............................................................................................................................................ 45
5.2.1 RF Trace .............................................................................................................................................. 45
5.2.2 POWER/GND ..................................................................................................................................... 45
5.2.3 USIM ................................................................................................................................................... 45