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 - 74 -
5. Electrical, reliability and radio characteristics
5.1. Absolute maximum ratings
Absolute maximum ratings for power supply and voltage on digital and analog pins of module are
listed in the following table:
Table 34: Absolute maximum ratings
Parameter Min Max Unit
VBAT -0.3 +4.73 V
Peak current of power supply 0 2 A
RMS current of power supply (during one TDMA- frame) 0 0.7 A
Voltage at digital pins -0.3 3.3 V
Voltage at analog pins -0.3 3.0 V
Voltage at digital/analog pins in power down mode -0.25 0.25 V
5.2. Operating temperature
The operating temperature is listed in the following table:
Table 35: Operating temperature
Parameter Min Typ Max Unit
Normal Temperature -35 +25 +80 ℃
Restricted Operation
1)
-40 ~ -35 +80 ~ +85 ℃
Storage Temperature -45 +90 ℃
1
）
When the module works in this temperature range, the deviation from the GSM specification
may occur. For example, the frequency error or the phase error will be increased.
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