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
M50Hardware Design
M50_HD_V2.0 - 8 -
0. Revision history
Revision Date Author Description of change
1.0 2011-12-20 Ray XU Initial
1.1 2012-02-03 Ray XU 1. Updated PCM interface
2. Updated SD interface
3. Updated charging interface
4. Updated timing of turning on the module
1.2 2012-07-20 Baly BAO 1. Deleted the USB interface
2. Deleted the camera interface
1.3 2012-10-22 Mountain ZHOU 1. Updated functional diagram
2. Updated reference design circuit
3. Updated audio characteristics
4. Updated VRTC DC characteristics
5. Updated SLEEP current consumption
6. Updated internet service protocols
7. Updated SIM pins’ name
8. Modified PCM function
9. Deleted FAX function
2.0 2012-06-16 Ray XU 1. Update the module size
2. Update the pin layout
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