MeiG Smart product technical information
SLM500 Hardware Design Guide Page 5
Contents
1. Introduction.......................................................................................................................................................... 8
2. Module overview.................................................................................................................................................. 8
2.1 Summary of features...................................................................................................................................... 9
2.2 Block diagram..............................................................................................................................................11
3. Module Package..................................................................................................................................................... 12
3.1.Pin distribution diagram............................................................................................................................. 12
3.2. Pin definitions.............................................................................................................................................. 13
3.3. Mechanical Dimensions.............................................................................................................................. 27
4. Interface application.............................................................................................................................................. 29
4.1. Power Supply.............................................................................................................................................. 29
4.1.1. Power Pin................................................................................................................................................. 31
4.2. Power on and off......................................................................................................................................... 31
4.2.1. Module Boot............................................................................................................................................. 31
4.2.2. Module Shutdown.................................................................................................................................... 33
4.2.2.1 PWRKEY Shutdown............................................................................................................................. 33
4.2.3.Module Reset............................................................................................................................................. 33
4.3. VCOIN Power............................................................................................................................................. 34
4.4. Power Output.............................................................................................................................................. 35
4.5. Serial Port.................................................................................................................................................... 35
4.6. MIPI Interface............................................................................................................................................. 37
4.6.1. LCD Interface .......................................................................................................................................... 38
4.6.2.MIPI Camera Interface........................................................................................................................... 40
4.7.CapacitiveTouch Interface.......................................................................................................................... 43
4.8.Audio Interface ............................................................................................................................................ 44
4.8.1Receiver Interface Circuit ......................................................................................................................... 44
4.8.2 Microphone receiving Circuit ................................................................................................................. 45
4.8.3.Headphone Interface Circuit ................................................................................................................... 45
4.8.4.Speaker Interface Circuit......................................................................................................................... 46
4.8.5.I2S Interface .............................................................................................................................................. 46
4.9. USB Interface.............................................................................................................................................. 46
4.9.1. USB OTG.................................................................................................................................................. 47
4.10. Charging Interface.................................................................................................................................... 48
4.10.1. Charging Detection................................................................................................................................ 49
4.10.2. Charge Control ...................................................................................................................................... 49
4.10.3. BAT_CON_TEM................................................................................................................................... 49
4.11 UIM Card Interface................................................................................................................................... 49
4.12. SD Card Interface..................................................................................................................................... 50
4.13 I2C Bus Interface....................................................................................................................................... 51
4.14 Analog to Digital Converter (ADC).......................................................................................................... 51
4.15. PWM.......................................................................................................................................................... 51
4.16. Motor ......................................................................................................................................................... 52
4.17 Antenna Interface...................................................................................................................................... 52
4.17.1 Main Antenna.......................................................................................................................................... 52
4.17.2 DRX Antenna.......................................................................................................................................... 53
4.18.3 GPS Antenna........................................................................................................................................... 54
4.18.4 WiFi/BT antenna..................................................................................................................................... 55
5.PCB Layout............................................................................................................................................................. 56
5.1. Module PIN distribution............................................................................................................................ 56
5.2. PCB Layout Principles............................................................................................................................... 56
5.2.1. Antenna..................................................................................................................................................... 56
5.2.2 Power Supply............................................................................................................................................. 57
5.2.3. SIM Card.................................................................................................................................................. 57
5.2.4. MIPI.......................................................................................................................................................... 58
5.2.5. USB............................................................................................................................................................ 58
5.2.6.Audio.......................................................................................................................................................... 58
5.2.7. Other......................................................................................................................................................... 59
6. Electrical, Reliability............................................................................................................................................. 61
6.1 Absolute Maximum...................................................................................................................................... 61
6.2 Working Temperature................................................................................................................................. 61
