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
- 3.2. Operating modes
- 3.3. Power supply
- 3.4. Power on and down scenarios
- 3.5. Charging interface
- 3.6. Power saving
- 3.7. Summary of state transitions
- 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
M80 Hardware Design
M80_HD_V1.2 - 56 -
3.10.4. Earphone interface design
1
2
4
3
Amphenol
9001-8905-050
SPK2P
MIC2N
MIC2P
22uF
68R
33pF
GND GND
AGND
Close to Socket
Differential layout
33pF
AGND
33pF 10pF
GND
GND
GND
GND
AGND
Module
4.7uF
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
ANTI
ESD
ANTI
Module
0R
0R
Figure 32: Loud speaker interface design