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12 Channel GPS PC/104 with 2 Serial I/O

12 Channel GPS PC/104 Board w/ 2 Serial
(GPS-102 and GPS-112)

  • 12 Channel PC/104 GPS receiver expansion module
  • 2 onboard 16C550 programmable RS-232 serial ports
  • Based on industry standard Conexant "Jupiter" GPS Module
  • 16C550 serial channel architecture
  • +5V only operation
  • Includes active antenna (GPS-112)
  • Supports Differentially Corrected Precision GPS

  • Check Price


The GPS-102 and GPS-112 are 12-Channel PC/104-16 GPS Receiver Expansion Modules with two on-board 16C550 based programmable RS-232 Serial Ports that work from +5V only.

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Jupiter Detailed Spec
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Based on the Industry Standard Conexant "Jupiter" GPS 12-Channel GPS Module and the industry norm 16C550 Serial Channel architecture, the GPS-102 and GPS-112 are a Stack-Through, 16-bit, PC/104 Boards featuring a complete, stand-alone 12-channel GPS Receiver Module attached to one of the two on-board independent high-speed Serial Ports.

This unit works from +5V only. Featuring the Conexant "JUPITER" GPS Receiver Module and two 16C550 based serial ports, these GPS Receiver Modules can be used in two different modes of operation:

  • Single-channel, GPS Receiver-only with an extra, free RS-232 Serial Port, or
  • Dual-channel, Differentially Corrected Precision GPS Reporting System

With the 16C550's 16-byte FIFOs, each Serial Port is individually programmable for use at any serial speed between 75bps and 115,200bps. The Conexant "JUPITER" GPS Receiver operates at the NMEA standard 4800 bps speed (8,N,1) or with the Conexant Proprietary Protocol at 9600 bps (8,N,1).

Operating from +5V only, the GPS-102 and GPS-112 are both fully capable of operating in all modes supported by the 16C550. Each Channel can be set to generate an Interrupt selectable by individual Jumpers from any available interrupt in the system. Each channel takes only 8 consecutive I/O Address spaces and the base address of each can be located on any "0" or "8" boundary within the total I/O Address Space between 0000H and 07F8H (the I/O addresses shown in hexadecimal notation):

IO Address Space:
0000H to 0007H up to and including 07F8H (to 07FFH)

IRQ 3, 4, 5, 6, 7, 9, 10, 11, 12, 14 or 15

The I/O Address Space for each port is set by an on-board 8-position switch according to the Address List attached hereto. The Interrupt is selected individually for each Port by on-board Jumpers.

The default Factory Settings for the two Ports are:

Port 2: I/O Address: 02E8H (corresponds to the I/O Address of COM4)
Interrupt: IRQ 5

Port 1: I/O Address: 03E8H (corresponds to the I/O Address of COM3)
Interrupt: IRQ 15

Serial Connectors
When used in the Single-Channel, non-corrected mode (default), the extra, free Serial Port can be used as normal, via either the on-board DB-9, Male connector, or via the on-board 2*5 pin Header, for extended cabling. Note that, as these two connectors are connected "in parallel", and that only one of these should be used for the Extra Port. Note also that pin number 10 in the header is connected to +5V, allowing limited power supply of off-board units like, for instance the TS-110 Serial touch Screen Controller, through the 10-wire ribbon cable. Note also that this pin is not available when using the DB-9 Male serial connector.

There are no special drivers needed for the serial ports, as these are based on the architecture of the Industry Standard Serial Input-Output chip - the 16C550. Any serial port driver developed for use with the standard serial ports in the PC will work with these ports, and, as an example, the drivers that come with all versions of Windows will work optimally with these ports. The interrupt outputs are high impedance when not active, allowing full sharing of any attached interrupt. Note that this will require a software driver written to allow for such sharing of interrupts.

The GPS Receiver will work with any software requiring the use of the Industry Standard NMEA Protocol, or the Proprietary Conexant Protocol.


The Conexant Jupiter 12-channel GPS Receiver

  • One of the smallest, most compact GPS Receivers – 2.800” * 1.575” * 0.480” (70 * 40 * 12mm)
  • Twelve parallel satellite tracking channels
  • Supports true NMEA-0183 data protocol
  • Direct, differential RTCM SC-104 data capability dramatically improves position accuracy. Available in both Conexant Binary and NMEA host modes
  • Static navigation enhancements to minimize wander due to Selective Ability (SA)
  • Compatible with passive antennas for lowest system cost, or with active antennas for highest degree of installation flexibility
  • Enhanced algorithms provide superior navigation performance in “urban canyon” and foliage environments
  • Adaptive threshold-based signal detection for improved reception of weak signals
  • Maximum navigation accuracy achievable with the Standard positioning Service (SPS)
  • Enhanced TTFF upon power-up when in a “keep-Alive” power condition before start-up
  • Meets rigid shock and vibration requirements including low-frequency vibration
  • Automatic Altitude Hold Mode from Three-Dimensional to Two-Dimensional navigation
  • Automatic cold-start acquisition process (when no initialization data is entered by the user)
  • Maximum operational flexibility and configurability via user commands over the host serial port
  • Ability to accept externally supplied initialization data
  • Three-Satellite Navigation startup from acquisition
  • User selectable satellites
  • User selectable visible satellite mask angle
  • Standard micro-miniature coaxial RF jack receptacle
  • Standard 2*10 pin field I/O connector
  • 5 Volt operation
  • Operation over an extended temperature range (-40 to +85 centigrades)
  • Relative Humidity up to 95% non-condensing, or a wet-bulb temperature of +35 centigrades, whichever is less
  • Altitude: -1000 feet to 60,000 feet.
  • Maximum vehicle dynamic: 500 m/sec (acquisition and navigation)
  • Vibration: Survival: 18G peak, 5 msec duration
  • Shock: Shipping (in container): 10 drops from 75 cm onto a concrete floor


View Entire Document
PDF (347K)

Jupiter Detailed Spec
PDF (388K)