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. Charging interface
- 3.6. Power saving
- 3.7. Summary of state transitions
- 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
M80 Hardware Design
M80_HD_V1.2 - 63 -
Table 20: Pin name of the SD card and Micro SD card
In SD card interface designing, in order to ensure good communication performance with SD card,
the following design principles should be complied with.
Route SD card trace as short as possible.
In order to offer good ESD protection, it is recommended to add TVS on signals with the
capacitance is less than 15pF.
Reserve external pull-up resistor for other data lines except the DATA0.
The SD_CLK and SD_DATA line must be shielded by GND in order to avoid interference.
Pin NO.
Pin name of SD card
Pin name of T-Flash(Micro SD) card
1
CD/DATA3
DATA2
2
CMD
CD/DATA3
3
VSS1
CMD
4
VDD
VDD
5
CLK
CLK
6
VSS2
VSS
7
DATA0
DATA0
8
DATA1
DATA1
9
DATA2