User's Manual

User manual of 3G SEP EVDO module
Page 13
2.1.2 SIM CARD CONNECTION
Figure 2: SIM connection
Note: A reference schematic of the SIM card connection is given in the
application note.
2.2 AUDIO
2.2.1 Audio interface
The 3G SEP M2M module features a PCM/I2S interface.
The PCM/I2S interface is a High speed full duplex interface that can be used to
send and receive digital audio data to external audio ICs with the following
characteristics:
Audio data could be transferred back and forth (Rx and Tx) using legacy digital
audio interface
Inter-IC sound (I2S) ports:
No external controller support.