System Connector Interface; Overview - Wavecom GR64 GSM/GPRS Integrator's Manual

5

System Connector Interface

5.1

Overview

Electrical connections to the Wireless CPU (except the antenna), are made through the
System Connector Interface. The system connector is a 60-pin, standard 0.05 in (1.27
mm) pitch device.
The system connector allows both board-to-board and board-to-cable connections
to be made. Use a board-board connector to connect the Wireless CPU directly to a
PCB, and a board-cable connector to connect the radio device via a cable. Surface
mount mating connectors for the 60-pin system connector are available from Harwin
(part number M50-3113022).
Figure 7 below shows the numbering of the connector pins.
An optional ground connection is provided at the mounting hole next to the RF
connector on the Wireless CPU as shown below. Connect this ground point to the
GND pins of the Wireless CPU by the shortest, low-impedance path possible. The
purpose of this connection is to allow for antenna ESD strikes to bypass the Wireless
CPU's internal ground path.
pin 59 pin 59
pin 60 pin 60
Figure 7: Wireless CPU, viewed from underneath
The following table gives the pin assignments for the system connector interface and
a short description for each signal.
signal is required to be used or not.
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ground connection ground connection
pin 1 pin 1
pin 2 pin 2
The rightmost column indicates whether the
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