Wavecom WMOi3, User Manual

Page: 8 / 14

WMOi3 integrated Modem
confidential
©
This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged
without prior written agreement. Ce document est la propriété exlcusive de WAVECOM. Il ne peut
être communiqué ou divulgué à des tiers sans son autorisation préalable.
8
3X 2.6V I
OH
= 3 mA
3.2 3.2 3.2 3.2 PIN Description PIN Description PIN Description PIN Description
3.2.1
3.2.1 3.2.1
3.2.1 Power Supply
Power Supply Power Supply
Power Supply
The main power supply will be provided through a double connection.
These connections are respectively the pin 3 and 4 for the +5V and the pins 1
and 2 for the ground (GND).
The power supply is 5V +/-5% 1A.
3.2.2 Serial Link RS232
This interface is needed for communication with a remote terminal with
respect to the RS232 V.28 standard levels. As the integrated modem does not
include a transceiver MAX3238 or MAX3237, this one has to be added outside
with a SUBD9. The connection between the WMOi3 and the transceiver must
not exceed 10 cm. The table below lists the needed signals for this interface :
PIN number
PIN number PIN number
PIN number Signal
Signal Signal
Signal Description
Description Description
Description
5 DCD Data Carrier Detect
28 RX Reception
25 TX Transmission
29 DTR Data Terminal Ready
27 DSR Data Set Ready
30 RTS Request To Send
13 CTS Clear To Send
9 RING Ring indicator
2 GND Ground
When the RS232 V.28 level is not needed, the above signals can be used as
TTL 3V CMOS compatible signals.
Application example needing V.28 levels : Application example needing V.28 levels : Application example needing V.28 levels : Application example needing V.28 levels :
Integrated
modem
50 PIN
CONNECTOR
RS 232
INTERFACE
TRANSCEIVER
+
SUBD9
PC
10 cm max.
Standard RS232