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 - 26 -
0.15×SIM_VDD
VOHmin=
SIM_VDD-0.4
holder.
SIM_CLK 55 O SIM clock 3V：
VOLmax=0.4
VOHmin=
0.9×SIM_VDD
1.8V:
VOLmax=
0.12×SIM_VDD
VOHmin=
0.9×SIM_VDD
SIM_RST 53 O SIM reset 3V：
VOLmax=0.36
VOHmin=
0.9×SIM_VDD
1.8V:
VOLmax=
0.2×SIM_VDD
VOHmin=
0.9×SIM_VDD
SIM_GND 52 SIM ground
SIM_PRESEN
CE
57 I SIM card detection VILmin=0V
VILmax=
0.25×VDD_EXT
VIHmin=
0.75×VDD_EXT
VIHmax=
VDD_EXT+0.3
If unused, keep
this pin open.
ADC
PIN NAME PIN
NO.
I/O DESCRIPTION DC
CHARACTERISTICS
COMMENT
ADC0 2 I General purpose
analog to digital
converter.
Voltage range: 0V to
2.8V
Please give
priority to the
use of ADC0.
If unused, keep
these pins open.
ADC1 1 I General purpose
analog to digital
converter.
Voltage range: 0V to
2.8V
PCM
PIN NAME PIN
NO.
I/O DESCRIPTION DC
CHARACTERISTICS
COMMENT
PCM_CLK 19 O PCM clock VILmin=0V
VILmax=
PCM_IN 18 I PCM data input
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