Chapter 6 – Application Considerations
Multi-Tech Systems, Inc. MMCModem GPRS Developer’s Guide (S000445D)
33
Getting Started & Terminal Emulator Setup
Minimum Hardware Interface Required To Get Started
At a minimum, it is necessary to connect the following signals to properly operate the
MMCModem:
Minimum Signals to Operate the MMCModem
Pin #
Name
Description
1 GND
Ground
2 GND
Ground
3 +5V
Power
Supply
4 +5V
Power
Supply
6 GND
Ground
13
CT106/CTS
Clear to Send
15
ON/OFF
Power On/Off *
21 GND
Ground
24 GND
Ground
25 CT103/TX Transmit
28 CT104/RX Receive
30
CT105/RTS
Request to Send
* Connected to +5V for example
The serial link signals must be used through the implementation of the serial link level shifter. See
“Level Shifter Application Diagram for Serial Link.”
Terminal Emulator Setup
Here below is an example based on the Windows
HyperTerminal application
(terminal emulator program).
Setup:
1.
Go
to
START – PROGRAMS – ACCESSORIES – HyperTerminal
.
2
. Start the HyperTerminal software.
3.
Give the name of your choice. Click on the icon of your choice, and click
OK
.
4.
Choose these operating parameter values:
Connect using: direct to COM1
Properties: 115200 bps; 8 bits data; no parity; 1 stop bit; hardware flow control.
5.
Click
OK
.
Once HyperTerminal is open and configured, it can be used to send AT commands to the
MMCModem.
For assistance in testing the MMCModem, see the examples in the AT Command manual for
Multi-Tech’s GPRS wireless modem products (
GPRS AT Commands Reference Guide
).
