User's Manual

Eagle II GSM Radio Module Technical Manual Preliminary Draft: 08/31/00 16
Part Number: 07100017 version 00.04
© 2000 Xircom, Inc. All rights reserved.
All trademarks and copyrights are the property of Xircom, Inc.
Pin
Number
Signal
Name
Direction Functionality Voltage
Level
16 TX0 From CPE Transmit data 0. DCE Input signal. Active low. Main serial
interface receive data signal. During idle or reset, signal
will be a logic 1. Connects to a DTE, TX, transmit data
pin.
5 V or 3 V
18 CTS0 To CPE Clear-To-Send 0. DCE Output signal. Active low. Main
serial interface clear to send signal. Connects to a DTE,
CTS, Clear to send pin.
3 V
20 RTS0 From CPE Request-To-Send 0. DCE Input signal. Active low. Main
serial interface request to send signal. Connects to a
DTE, RTS, Request-To-Send pin.
5 V or 3 V
22 DTR0 From CPE Data Terminal Ready 0. DCE Input signal. Active low.
Main serial interface data terminal ready signal. Connects
to a DTE, DTR, Data Terminal Ready pin.
5 V or 3 V
10 DSR0 To CPE Data Set Ready 0. DCE Output signal. Active low. Main
serial interface data set ready signal. Connects to a DTE,
DSR, Data Set Ready pin.
3 V
12 DCD0 To CPE Data Carrier Detect 0. DCE Output signal. Active low.
Main serial interface data carrier detect signal. Connects
to a DTE, CD, Carrier Detect pin.
3 V
14 RI0 To CPE Ring Indicator 0. DCE Output signal. Active low. Main
serial interface ring indicator signal. Connects to a DTE,
RI, Ring Indicator pin.
3 V
Microphone
47 MIC1P From CPE Microphone 1 Positive. Positive input pin from an electret-
type microphone. Nominal microphone differential voltage
should be 2.0 volts. Impedance not less than 900 ohms.
Leave signal disconnected if function is not used.
51 MIC1N From CPE Microphone 1 Negative. Negative input pin from an
electret-type microphone. Nominal microphone differential
voltage should be 2.0 volts. Impedance not less than 900
ohms. Leave signal disconnected if function is not used.
Speaker
55 SPK1P To CPE Speaker 1 Positive. Positive output pin. High side of a
push-pull amplifier. Speaker impedance 15 ohms,
minimum. Speaker capacitance of 700 pF, maximum.
Driver voltage is 4.5 V peak-to-peak. Leave signal
disconnected if function is not used.
59 SPK1N To CPE Speaker 1 Negative. Negative output pin. Low side of a
push-pull amplifier. Speaker impedance 15 ohms,
minimum. Speaker capacitance of 700 pF, maximum.
Driver voltage is 4.5 V peak-to-peak. Leave signal
disconnected if function is not used.