User's Manual
Table Of Contents
- 1 Introduction
- 2 Module Power
- 3 Physical Interfaces
- Module Mounting to Host Board (Reference)
- Connectors
- Connectors
- I/O Connector Pin Assignments
- Circuit Protection
- Antenna
- Control Connector Signal Functions
- Module Power (Pins 85, 87, 89, 91, 93, 95, 97, 99)
- Power Control (Pin 35) - (PWR_CTL)
- Level Translation Reference Power (Pin 77)
- USB (Pins 1, 3, 5, 7, 9)
- General Purpose Input/Output Interface
- RTC Sleep
- Serial Interfaces & Handshake (Pins 11, 13, 15, 17, 19, 21, 23, 25)
- Multi-Channel Serial Interface (MCSI) – (Pins 12, 14, 16, 18)
- VBackup Input (Pin83)
- Using VBackup
- Analog-to-Digital Input (Pin 74)
- Handset Microphone Input (Pins 65, 67)
- Handset Microphone Bias Output (Pin 63)
- Handset Speaker Output (Pins 71, 73)
- Headset Microphone Input (Pin 55)
- Headset Microphone Bias Output (Pin 53)
- Headset Speaker Output Left & Right (Pins 57, 59)
- Headset Output Common Mode (Pin 61)
- Headset Detect (Pin 47)
- Subscriber Identity Module (SIM) Carrier (Pins 76, 78, 80, 82, 84)
- 4 Hardware Design
- General Design Guidelines for Using Novatel Wireless M2M GSM Modules
- Enabling the Transmission Modes for the GSM/GPRS Services
- Voice Communication
- Circuit-Switched Data
- SMS: Short Message Services
- Provisioning The SIM
- GSM Services Supported by the Novatel Wireless M2M Enabler IIIG Module
- GPRS Services Supported by the Novatel Wireless M2M Enabler IIIG Module
- Selecting the GSM Modes of Operation
- 5 Setup and Initialization
- 6 Integration and Testing
32 novatelwireless.com
Serial I/O & Control Parameter/Conditions Min Typ Max Units
VIL Input Voltage – Low 0.54 Vdc
VIH Input Voltage – High 1.26 1.95 Vdc
VOL Output Voltage – Low 0.54 Vdc
VOH Output Voltage – High 1.26 1.95 Vdc
IOL / IOH Rated Output Current 2.0 mA
Multi-Channel Serial Interface (MCSI) – (Pins 12, 14, 16, 18)
This port is only available in Master mode and to be used for PCM digital audio. Below are the
settings for configuring it operation and the interface specification:
Digital Audio Configuration
The default settings for the digital audio are:
l
Mode = Master
l
MCSI_CLK = 520KHz
l
Word Size = 16 Bits
l
Sync Pulse = 8KHz
l
Frame mode = burst
l
Clock edge Sync = rising edge
Configuring the MCSI for Digital Audio
The following two commands are required to set the unit up in digital audio mode:
AT$voicepth=2
This configures the EIII module to use digital audio instead of analog audio.
at$ioblks=0,1
This configures the I/O pins of the module to be used as the secondary function which is the
MCSI port. It automatically configures the direction of the pins.
Do not alter the settings for these 4 pins manually (direction, pull up or alternate
configuration) as this will stop the MCSI port working for digital audio.
Data Format