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
38 novatelwireless.com
50 dB
Amplifier State in Power Down High
Z
The left and right channels of the headset speaker output are a single ended output. An
external audio amplifier should be used for loads of less than 32 W or if volume is inadequate.
Headset Output Common Mode (Pin 61)
The left and right headset amplifiers provide the stereo signal on terminals HSOL and HSOR.
A pseudo ground is provided on terminal HSOVMID to eliminate external capacitors.
HSOVMID Parameter/Conditions Min Typ Max Units
Maximum Capacitor Load 200 pF
DC Level 1.2 1.35 1.5 V
Headset Detect (Pin 47)
Headset Plug/Unplug detection. This pin is used to automatically switch to the headset audio
path when enabled with AT$VSELECT=3. The device will default to handset when no
Headset is detected.
2 modes:
l
Module already ON (Battery connected, VRIO ON) and plug event;
l
Module OFF and plug event: the plug detection will be effective once VRIO is set ON
Plug and unplug detections are digitally debounced (debouncing time = 8 ms).
The jack plug detection feature is addressed through the HSDET pin. The integrated pull up,
connected to the pin, forces a high level (VBAT) when the headset load is not connected. At
jack insertion headset load connection (32 W) imposes a low level on that node (Headset left
channel): as an example HSDET = 1 mV after jack plug for VBAT = 4 V.
Input comparator threshold voltages are defined as VTlow = VBAT/2 – 100 mV and VThigh =
VBAT/2 + 100 mV, VBATmin = 3.2 V. The plug and unplug detection remains functional if
there is no signal from HSOL amplifier output (stereo path is OFF) or if there is a signal from
HSOL (stereo path is ON): maximum level on HSOL when the stereo path is ON is 1 Vp-p which
stays far enough from the comparator threshold levels VBATmin/2 – 100 mV and VBATmin/2
+ 100 mV.