ORBCOMM OG2 Modem Integration Manual
10
Pin #
Title
In-Out /Voltage
Description
51
SD Card WP
Input, 1.8v
1
SD Card detection, GPIO,
52
Main Power
4.0-15v
2
Input Power
Table 2-1 Pin Definition
1)
These signals are connected to the processor and are intended for future use, however they are
shut-off and not supported by the firmware at this time. These signals can be left floating/not
connected.
2)
RF power will be gradually reduced from 6W to 2W as input voltage drops below 4.0 volts
.
User
Data Power is the user defined the input voltage so serial ports are translated to the desired DC
level.
3)
Master and Debug serial interface voltages are determined by the voltage supplies to
USER_DATA_POWER. This voltage must be within the indicated voltage range.
4)
SATELLITE_IN_VIEW indicates that the receiver has currently locked on to a satellite downlink.
This is the first stage of creating a message session.
5)
Master reset is pulled high (to 1.8v) within the modem. The signal can be pulled down to an
active state via a FET or transistor. The current is <200uA.
2.2.2
User Connector Mechanical Information
All non-RF connections are provided by a MINI PCI Express format connector. This card edge
connector uses .8mm pitch fingers to provide 52 connections, 26 per side. This connector is
available in several heights to allow the user to retain PCB area for most components. Mechanical
drawings are provided below. This drawing specifies the mechanical position of the User connector
with respect to the mounting holes.
