User's Manual
Table Of Contents
- Contents
- Table Index
- Figure Index
- 0. Revision history
- 1. Introduction
- 2. Product concept
- 3. Application interface
- 3.1. Pin of module
- 3.2. Operating modes
- 3.3. Power supply
- 3.4. Power on and down scenarios
- 3.5. Charge interface
- 3.6. Power saving
- 3.7. Summary of state transition
- 3.8. RTC backup
- 3.9. Serial interfaces
- 3.10. Audio interfaces
- 3.11. SIM card interface
- 3.12. SD card interface
- 3.13. PCM interface
- 3.14. ADC
- 3.15. Behaviors of the RI
- 3.16. Network status indication
- 3.17. Operating status indication
- 4. Antenna interface
- 5. Electrical, reliability and radio characteristics
- 6. Mechanical dimensions
- 7. Storage and manufacturing
- Appendix A: GPRS coding schemes
- Appendix B: GPRS multi-slot classes
M50 Hardware Design
M50_HD_V2.0 - 54 -
3.10.4. Earphone interface design
Amphenol
9001-8905-050
1
2
4
3
SPK2P
MIC2N
MIC2P
22uF
68R
GND GND
AGND
Close to Socket
Differential layout
AGND
GND
GND
GND
GND
AGND
Module
4.7uF
33pF
0603
10pF
0603
33pF
0603
10pF
0603
ESD
ESD
Figure 31: Earphone interface design
3.10.5. Loud speaker interface design
LOUDSPKP
LOUDSPKN
Differential layout
10pF
10pF
33pF
33pF
Close to Speaker
GND
GND
100pF
ESD
ESD
Module
0R
0R
0603
0603 0603
0603
Figure 32: Loud speaker interface design
Quecctel
Confidential