MeiG Smart product technical information
SLM758 Hardware Design Guide Page 5
Contents
1. Introduction.......................................................................................................................................................... 8
2. Module overview.................................................................................................................................................. 8
2.1 Summary of features.................................................................................................................................... 10
2.2 Block diagram............................................................................................................................................. 12
3. Module Package..................................................................................................................................................... 13
3.1.Pin distribution diagram............................................................................................................................. 13
3.2. Pin definitions.............................................................................................................................................. 14
3.3. Mechanical Dimensions.............................................................................................................................. 30
4. Interface application.............................................................................................................................................. 31
4.1. Power Supply.............................................................................................................................................. 31
4.1.1. Power Pin................................................................................................................................................. 33
4.2. Power on and off......................................................................................................................................... 34
4.2.1. Module Boot............................................................................................................................................. 34
4.2.2. Module Shutdown.................................................................................................................................... 35
4.2.2.1 PWRKEY Shutdown............................................................................................................................. 35
4.2.3.Module Reset............................................................................................................................................. 36
4.3. VCOIN Power............................................................................................................................................. 37
4.4. Power Output.............................................................................................................................................. 38
4.5. Serial Port.................................................................................................................................................... 38
4.6. MIPI Interface............................................................................................................................................. 41
4.6.1. LCD Interface .......................................................................................................................................... 41
4.6.2.MIPI Camera Interface........................................................................................................................... 45
4.7.Resistive Touch Interface............................................................................................................................ 49
4.8.CapacitiveTouch Interface.......................................................................................................................... 49
4.9.Audio Interface ............................................................................................................................................ 49
4.9.1Receiver Interface Circuit......................................................................................................................... 50
4.9.2 Microphone receiving Circuit................................................................................................................. 50
4.9.3.Headphone Interface Circuit ................................................................................................................... 51
4.9.4.Speaker Interface Circuit......................................................................................................................... 52
4.9.5.I2S Interface.............................................................................................................................................. 53
4.10. USB Interface............................................................................................................................................ 53
4.10.1. USB OTG................................................................................................................................................ 54
4.11. Charging Interface.................................................................................................................................... 55
4.11.1. Charging Detection................................................................................................................................ 55
4.11.2. Charge Control ...................................................................................................................................... 55
4.11.3. BAT_CON_TEM................................................................................................................................... 55
4.12 UIM Card Interface................................................................................................................................... 56
4.13. SD Card Interface..................................................................................................................................... 57
4.14 I2C Bus Interface....................................................................................................................................... 57
4.15 Analog to Digital Converter (ADC).......................................................................................................... 58
4.16. PWM.......................................................................................................................................................... 58
4.17. Motor ......................................................................................................................................................... 58
4.18 Antenna Interface...................................................................................................................................... 59
4.18.1 Main Antenna.......................................................................................................................................... 59
4.18.2 DRX Antenna.......................................................................................................................................... 60
4.18.3 GPS Antenna........................................................................................................................................... 61
4.18.4 WiFi/BT antenna..................................................................................................................................... 61
5.PCB Layout............................................................................................................................................................. 63
5.1. Module PIN distribution............................................................................................................................ 63
5.2. PCB Layout Principles............................................................................................................................... 63
5.2.1. Antenna..................................................................................................................................................... 63
5.2.2 Power Supply............................................................................................................................................. 64
5.2.3. SIM Card.................................................................................................................................................. 64
5.2.4. MIPI.......................................................................................................................................................... 65
5.2.5. USB............................................................................................................................................................ 65
5.2.6.Audio.......................................................................................................................................................... 65
5.2.7. Other......................................................................................................................................................... 66
