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 - 52 -
Close to Microphone
MICxP
MICxN
GND
GND
Differential layout
Module
Electret
Microphone
GND
GND
GND
GND
ESD
ESD
10pF
0603
10pF
0603
10pF
0603
33pF
0603
33pF
0603
33pF
0603
Figure 27: Reference design for
AIN1&AIN2
3.10.3. Receiver and speaker interface design
SPK1P
SPK1N
Differential layout
10pF
0603
10pF
0603
33pF
0603
33pF
0603
33pF
0603
Close to Speaker
GND
GND
10pF
0603
ESD
ESD
Module
Figure 28: Reference design for AOUT1
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