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
35 novatelwireless.com
Handset Microphone Input (Pins 65, 67)
The handset differential inputs MICIP and MICIN can be amplified by the differential handset
microphone amplifier. This amplifier has a gain of 25.6 dB and a bias generator MICBIAS
provides an external voltage of 2 V or 2.5 V to bias the microphone.
Handset Mic Input Parameter/Conditions Min Typ Max Units
Maximum Input Range –
Mic(+) to Mic(-) Inputs 3 dBm0 (Max. digital sample amplitude when PGA gain set
to 0 dB)
32.5 mVRMS
Nominal Ref. Level –
Mic(+) to Mic(-) Differential MIC
-10 dBm0
Differential Input Resist-
ance –
Mic(+) to Mic(-) Differential MIC, MICAMP gain = 25.6 dB
(INMODE = 0001)
36 kW
Microphone Pre-Amplifier
Gain
Differential MIC
25.6 dB
Handset Microphone Bias Output (Pin 63)
Mic Bias Output Parameter/Conditions Min Typ Max Units
Bias Voltage on Mic(+) Set to 2.0 V 1.9 2.1 Vdc
Set to 2.5 V 2.4 2.6 Vdc
Mic Bias Current Capability 2.0 mA
Handset Speaker Output (Pins 71, 73)
Pin Name Pin Number Signal Direction Description
EARP 71 O Earphone positive output
EARN 73 O Earphone negative output
The earphone amplifier provides a full differential signal on the terminals EARP and EARN
(Earphone).
Handset Spkr Output Parameter/Conditions Min Typ Max Units
Maximum Differential Resistive Load Output Swing 3.9 VPP 120 W
Output Swing 1.5 VPP 33 W