Electrical Interfaces; User Connector; User Connector Type - Iridium 9523 Product Developer Manual

Iridium Communications, Inc.
Iridium 9523 Product Developer's Guide
Revision 7.0

3 Electrical Interfaces

The following subsections contain information for the electrical interfaces of the Iridium 9523 for the non-
RF connections. The RF interface is covered in Section 4.

3.1 User Connector

Table 5 lists the connections to the Iridium 9523 on the user connector.
Signal group
PCM Digital Audio
DPL port
Data/Fax port
SIM interface
Power
GPIO, antenna
configuration
Other GPIO
3.1.1

User Connector Type

The connector on the Iridium 9523 is a 40-way, 0.5 mm pitch Molex low-profile header connector, part
number 54102-0404.
This connector provides the ability for a stackable board-to-board configuration, allowing connection to
the host system motherboard via a mating 53885-0408 socket.
Data sheets on these connectors can be found at:
Pin numbering schemes for the Molex connectors on the Iridium 9523 and the host FA board are shown
in Figure 5 (both pictures show the pin-out when looking down onto the boards).
Iridium Communications, Inc.
Proprietary & Confidential Information
Only
Table 5: Signal Groups on User Connector
Two synchronous serial interfaces carrying 16-bit, 8 kHz sample rate
PCM audio data
Each port has 4 wires – data in each direction, clock and frame signals
Only one digital audio port is in use at any time
Port 1 has a secondary function during factory testing, to carry the 90ms
frame synchronization from the test equipment
Serial asynchronous control interface
2 wires – data in each direction
Serial asynchronous control interface
8 wires – data in each direction plus control signals
The full set of control signals may be used for a Data/Fax port
Standard SIM signals
5 wires – data, clock, reset, enable, voltage select
Battery Supply to Iridium 9523
5 power pins – 3x battery voltage and 2x boost voltage
6 grounds
1 boost regulator control line (PA_BOOST_EN)
2 wires – ANT_DET_PWR and FULL_POWER_EN. Signals provided as
a mechanism to restrict the transmitted power – for example in order to
meet SAR standards.
2 wires – TX_ACTIVE which may be used as an output to indicate when
the transmitter is active, and LBT_HSTB which determines the operating
mode of the software on the Iridium 9523.
http://www.molex.com
Page 16 of 27
Information Contained in this Guide
is Subject to Change Without Notice
Signal function
Distribution of Guide Restricted
to Product Developers