3.7.1.
UART Port ...................................................................................................................... 39
3.7.1.1.
3.7.1.2.
3.7.1.3.
3.7.2.
Debug Port ..................................................................................................................... 42
3.7.3.
UART Application ........................................................................................................... 43
3.8.
Audio Interfaces ..................................................................................................................... 44
3.8.1.
3.8.2.
3.8.3.
3.8.4.
3.8.5.
3.8.6.
Audio Characteristics ..................................................................................................... 48
3.9.
PCM Interface ........................................................................................................................ 49
3.9.1.
Configuration .................................................................................................................. 50
3.9.2.
Timing ............................................................................................................................. 50
3.9.3.
Reference Design .......................................................................................................... 52
3.9.4.
AT Command ................................................................................................................. 52
3.10.
SIM Card Interfaces .............................................................................................................. 53
3.11.
Behaviors of The RI ............................................................................................................... 57
3.12.
Network Status Indication ...................................................................................................... 58
3.13.
4
Antenna Interface ............................................................................................................................... 61
4.1.
RF Reference Design ............................................................................................................ 61
4.2.
RF Output Power ................................................................................................................... 62
4.3.
RF Receiving Sensitivity ........................................................................................................ 62
4.4.
Operating Frequencies .......................................................................................................... 63
4.5.
Antenna Requirement ........................................................................................................... 63
4.6.
RF Cable Soldering ............................................................................................................... 64
5
5.1.
Absolute Maximum Ratings................................................................................................... 65
5.2.
Operating Temperature ......................................................................................................... 65
5.3.
Power Supply Ratings ........................................................................................................... 66
5.4.
Current Consumption ............................................................................................................ 67
5.5.
Electro-static Discharge ........................................................................................................ 68
6
Mechanical Dimensions .................................................................................................................... 70
6.1.
6.2.
Recommended Footprint ....................................................................................................... 72
6.3.
Top View of the Module ......................................................................................................... 73
6.4.
Bottom View of the Module ................................................................................................... 73
7
Storage and Manufacturing .............................................................................................................. 74
Firmware Upgrade ............................................................................................. 42
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GSM/GPRS Module Series
M35 User Manual
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