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. Power saving
- 3.6. Summary of state transitions
- 3.7. RTC backup
- 3.8. Serial interfaces
- 3.9. Audio interfaces
- 3.10. SIM card interface
- 3.12. Behaviors of the RI
- 3.13. Network status indication
- 3.14. 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
M95 Hardware Design
M95_HD_V1.0 - 52 -
3.9.6. Audio characteristics
Table 13: Typical electret microphone characteristics
Parameter
Min
Typ
Max
Unit
Working
Voltage
1.2
1.5
2.0
V
Working
Current
200
500
uA
External
Microphone
Load Resistance
2.2
k Ohm
Table 14: Typical speaker characteristics
Parameter
Min
Typ
Max
Unit
Normal
Output
(AOUT1)
Single
Ended
Load
Resistance
28
32
Ohm
Ref level
0
2.4
Vpp
Differential
Load
Resistance
28
32
Ohm
Ref level
0
4.8
Vpp
Auxiliary
Output
(AOUT2)
Single
Ended
Load
Resistance
8
Load
Resistance
Ref level
0
VBAT
Vpp
Differential
Load
Resistance
8
Load
Resistance
Ref level
0
2*VBAT
Vpp
3.10. SIM card interface
3.10.1. SIM card application
The SIM interface supports the functionality of the GSM Phase 1 specification and also supports
the functionality of the new GSM Phase 2+ specification for FAST 64 kbps SIM card, which is
intended for use with a SIM application Tool-kit.