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 - 69 -
3.16. Network status indication
The NETLIGHT signal can be used to drive a network status indicator LED. The working state of
this pin is listed in the following table.
Table 28: Working state of the NETLIGHT
State Module function
Off The module is not running.
64ms On/ 800ms Off The module is not synchronized with network.
64ms On/ 2000ms Off The module is synchronized with network.
64ms On/ 600ms Off GPRS data transfer is ongoing.
A reference circuit is shown as below.
Module
300R
4.7K
47K
VBAT
NETLIGHT
Figure 47: Reference design for NETLIGHT
3.17. Operating status indication
The STATUS pin is set as an output pin and can be used to judge whether module is power-on. In
customer’s design, this pin can be connected to a GPIO of DTE or be used to drive an LED in
order to judge the module’s operation status. A reference circuit is shown in Figure 48.
Table 29: Pin definition of the STATUS
Name Pin Description
STAT US 16 Indicate module operating status
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