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
22 novatelwireless.com
The uplink burst will cause strong ripple on the voltage lines and should be
effectively filtered. We recommend that you place 1000 to 2000 µF of
capacitance as close to the modem I/O connector as possible. Do not allow the
input voltage level to drop below the minimum voltage rating under any
circumstances, especially during the uplink burst period.
Power Control (Pin 35) - (PWR_CTL)
The input is equivalent to a “phone ON-button”. A falling-edge on this Active-Low input will
switch-ON the module or switch-OFF the module after a delay*. This input has a “weak pull-
up” resistor inside the module. You can leave this input grounded if it does not require the
RTC Sleep Function. If it requires RTC Sleep, then you must float the PWR_CTL line to allow
the internal resistor to pull the line high.
Only an open collector/open drain device may control the Power Control signal. Driving the
Power Control signal high may interfere with the normal operation of the modem. If driving
from an external microprocessor, you can control the Power Control by driving the control pin
low as an output, then changing the microprocessor’s pin control to be an input (this will
satisfy the high impedance requirement).
The AT$OFFDLY Command controls the OFF Delay. A value of 0 disables the
PWR_CTL line from turning the module off. 0 is the default value.
To enable the module to switch-OFF via PWR_CTL, you must set AT$OFFDLY to
a value other than 0. The valid range is 100 to 1000 milliseconds.
Turning On The Enabler IIIG
You must pull the PWR_CTL line on the Enabler IIIG LOW for at least 50mS (after applying
and stabilizing Vbat) to turn it ON. Allow a minimum of 2 seconds for Vbat to stabilize before
asserting the PWR_CTL signal to turn on the modem.
Do not use a pull-up resistor on the PWR_CTL line since the line is pulled up internal to the
modem.