rtd GPS25162HR User manual

RTD Embedded Technologies, Inc.
AS9100 and ISO 9001 Certified
GPS25162HR/GPS35162HR
PCIe/104 GPS Receiver
User’s Manual
BDM-610020158 Rev. A

RTD Embedded Technologies, Inc.
103 Innovation Boulevard
State College, PA 16803 USA
Telephone: [phone]
Fax: [phone]
www.rtd.com
[email protected]
[email protected]

RTD Embedded Technologies, Inc. | www.rtd.com iii GPS25162HR/GPS35162HR User’s Manual
BDM-610020158 Rev A
Revision History
Rev A Initial Release
Advanced Analog I/O, Advanced Digital I/O, aAIO, aDIO, a2DIO, Autonomous SmartCal, “Catch the Express”, cpuModule, dspFramework, dspModule, eBuild, expressMate, ExpressPlatform, “MIL Value for COTS
prices”, multiPort, PlatformBus, and PC/104EZ are trademarks, and “Accessing the Analog World”, dataModule, IDAN, HiDAN, HiDANplus, RTD, the RTD logo, and StackNET are registered trademarks of RTD
Embedded Technologies, Inc. (formerly Real Time Devices, Inc.). PS/2 is a trademark of International Business Machines Inc. PCI, PCI Express, and PCIe are trademarks of PCI-SIG. PC/104, PC/104-Plus, PCI-104,
PCIe/104, PCI/104-Express and 104 are trademarks of the PC/104 Consortium. All other trademarks appearing in this document are the property of their respective owners.
Failure to follow the instructions found in this manual may result in damage to the product described in this manual, or other components of the system. The procedure set forth in this manual shall only be performed
by persons qualified to service electronic equipment. Contents and specifications within this manual are given without warranty, and are subject to change without notice. RTD Embedded Technologies, Inc. shall not
be liable for errors or omissions in this manual, or for any loss, damage, or injury in connection with the use of this manual.
Copyright © 2021 by RTD Embedded Technologies, Inc. All rights reserved.

RTD Embedded Technologies, Inc. | www.rtd.com iv GPS25162HR/GPS35162HR User’s Manual
BDM-610020158 Rev A
Table of Contents
1Introduction 7
1.1 Product Overview........................................................................................................................................................................ 7
1.2 Board Features ........................................................................................................................................................................... 7
1.3 Ordering Information................................................................................................................................................................... 8
1.3.1 Cable Kits 8
XK-CM57 8
IDAN-XKCM34 8
1.4 Contact Information .................................................................................................................................................................... 9
1.4.1 Sales Support 9
1.4.2 Technical Support 9
2Specifications 10
2.1 Operating Conditions ................................................................................................................................................................ 10
2.2 Electrical Characteristics .......................................................................................................................................................... 10
3Board Connection 11
3.1 Board Handling Precautions ..................................................................................................................................................... 11
3.2 Physical Characteristics............................................................................................................................................................ 11
3.3 Connectors and Jumpers.......................................................................................................................................................... 12
3.3.1 Bus Connectors 12
CN1(Top) & CN2(Bottom): PCIe Connector 12
CN3: PCI Connector (GPS25162HR Only) 12
3.3.2 External I/O Connectors 12
CN7: Serial I/O Connector 12
CN4: Utility Connector 13
CN5: GPS Antenna Connector 13
3.3.3 Jumpers 13
JP1: GPS Antenna Bias 13
JP2: 1 PPS on Carrier Detect 13
3.3.4 LEDs 13
D1: GPS Fix LED 13
D2: 1PPS LED 13
3.4 Steps for Installing .................................................................................................................................................................... 14
4IDAN Connections 15
4.1 Module Handling Precautions................................................................................................................................................... 15
4.2 Physical Characteristics............................................................................................................................................................ 15
4.3 Connectors................................................................................................................................................................................ 15
4.3.1 Bus Connectors 15
CN1(Top) & CN2(Bottom): PCIe Connector 15
4.3.2 External I/O Connectors 16
Utility Connector - 9-pin “D” Female Connector 16
Serial Connector - 9-pin “D” Male Connector 16
GPS Antenna - SMA Female Connector 17
4.4 Steps for Installing .................................................................................................................................................................... 17
5Functional Description 18
5.1 Block Diagram........................................................................................................................................................................... 18
5.2 PCIe UART ............................................................................................................................................................................... 18
5.2.1 GPS Interface 18
GPS module interface 19
GPS Antenna 19
COCOM Limits 19

RTD Embedded Technologies, Inc. | www.rtd.com vGPS25162HR/GPS35162HR User’s Manual
BDM-610020158 Rev A
6Software 20
6.1 Installing the Software .............................................................................................................................................................. 20
6.2 Software Programming ............................................................................................................................................................. 20
6.2.1 API Interface 20
6.2.2 COM Port Numbering 20
6.2.3 Base Address and Register Mapping 20
6.3 Windows ................................................................................................................................................................................... 20
7Troubleshooting 21
8Additional Information 22
8.1 PC/104 Specifications............................................................................................................................................................... 22
8.2 PCI and PCI Express Specification .......................................................................................................................................... 22
9Limited Warranty 23

RTD Embedded Technologies, Inc. | www.rtd.com vi GPS25162HR/GPS35162HR User’s Manual
BDM-610020158 Rev A
Table of Figures
Figure 1: Board Dimensions ................................................................................................................................................................................... 11
Figure 2: Board Connections .................................................................................................................................................................................. 12
Figure 3: Example 104™Stack............................................................................................................................................................................... 14
Figure 4: IDAN Dimensions .................................................................................................................................................................................... 15
Figure 5: IDAN Front Panel .................................................................................................................................................................................... 16
Figure 6: Example IDAN System ............................................................................................................................................................................ 17
Figure 7: GPS35162 Block Diagram....................................................................................................................................................................... 18
Table of Tables
Table 1: Ordering Options ........................................................................................................................................................................................ 8
Table 2: Operating Conditions ................................................................................................................................................................................ 10
Table 3: Electrical Characteristics .......................................................................................................................................................................... 10
Table 4: CN7 in UART RS-232 Mode..................................................................................................................................................................... 13
Table 5: CN4 Utility................................................................................................................................................................................................. 13
Table 6: JP3 Settings.............................................................................................................................................................................................. 13
Table 7: JP4 Settings.............................................................................................................................................................................................. 13
Table 8: IDAN-GPS35162 Utility Connector........................................................................................................................................................... 16
Table 9: IDAN-GPS35162 Serial Connector .......................................................................................................................................................... 16

RTD Embedded Technologies, Inc.
AS9100 and ISO 9001 Certified
1Introduction
1.1 Product Overview
The GPS35162 is designed to provide a PCIe UART interface to a GPS Receiver. This GPS module utilizes the Linx RXM-GNSS-TM GPS
Receiver. This provides a low-power solution that supports NMEA-0183 protocol. This module also supports +3.3V and +5V active antennas.
1.2 Board Features
•PC/104 form factor
•Bus Structure Options:
oPCIe/104 (GPS35162HR)
▪PCIe universal expansion bus (Type 1 or Type 2)
oPCI/104-Express (GPS25162HR)
▪PCIe universal expansion bus (Type 1 or Type 2)
▪PCI pass-through expansion bus
•PCIe x1 interface (Gen 2, 5 GT/s)
•PCIe link repopulation allowing increased PCI Express stack capacity
•Linx RXM-GNSS-TM GPS engine
oL1 1575.42MHz, C/A code
o33-channel satellite tracking
oPosition accuracy: 2.5m
oTime accuracy of ±11ns
o1Hz update rate (configurable up to 10Hz)
oTracking sensitivity down to -164 dBm
oProtocol: NMEA-0183 ver 4.10
oConstellation System Support:
▪GPS
▪GLONASS
▪GALILEO
▪QZSS
oDGPS support:
▪(SBAS) Satellite-Based Augmentation System
▪(RTCM) Radio Technical Commission for Maritime Services
▪(WAAS) Wide-Area Augmentation System
▪(EGNOS) European Geo-Stationary Navigation System
▪(MSAS) MTSAT Satellite-Based Augmentation System
▪(GAGAN) GPS-Aided Geo-Augmented Navigation
•Supports active (+3.3V or +5V) and passive antennas
•Requires only +5 VDC for operation

RTD Embedded Technologies, Inc. | www.rtd.com 8GPS25162HR/GPS35162HR User’s Manual
BDM-610020158 Rev A
1.3 Ordering Information
The GPS35162 is available with the following options:
Table 1: Ordering Options
Part Number
Description
GPS35162HR
PCIe/104 GPS Receiver with Linx RXM-GNSS-TM GPS Engine
SK-GPS35162HR
Starter Kit including GPS35162HR, adapter cable, and antenna (XK-CM57)
GPS25162HR
PCI/104 Express GPS Receiver with Linx RXM-GNSS-TM GPS Engine
SK-GPS25162HR
Starter Kit including GPS25162HR, adapter cable, and antenna (XK-CM57)
IDAN-GPS35162HRS
PCIe/104 GPS module in modular IDAN frame
IDAN-SK-GPS35162HRS
PCIe/104 GPS module in modular IDAN frame;
with cables and antennae kit (IDAN-XKCM34)
IDAN-GPS25162RS
PCI/104 Express GPS module in modular IDAN frame
IDAN-SK-GPS25162HRS
PCI/104 Express GPS module in modular IDAN frame;
with cables and antennae kit (IDAN-XKCM34)
The Intelligent Data Acquisition Node (IDAN™) building block can be used in just about any combination with other IDAN building blocks to
create a simple but rugged 104™ stack. This module can also be incorporated in a custom-built RTD HiDAN™ or HiDANplus®High Reliability
Intelligent Data Acquisition Node. Contact RTD sales for more information on our high reliability systems.
1.3.1 CABLE KITS
XK-CM57
The XK-CM57 is a GPS antenna for use with the stand-alone GPS25162HR/GPS35162HR.
•50-Ohm MCX Plug connector
o1.575 GHz
o+5 VDC Active Antenna
oMagnetic Base Mount
•Dimensions
oCable length: 16 feet
oHeight: 0.5 inches
oBase: 1.8 inches square
•Weight: < 1 lbs.
•Operating temperature, 90% humidity non-condensing: -40 to +85C
•Storage temperature, -40 to +85C
IDAN-XKCM34
The IDAN-XKCM34 is a GPS antenna for use with the IDAN-GPS25162HRS and IDAN-GPS35162HRS.
•50-Ohm SMA connector
o1.575 GHz
o+5 VDC Active Antenna
oMagnetic Base Mount
•Dimensions
oCable length: 16 feet
oHeight: 0.5 inches
oBase: 1.8 inches square
•Weight: < 1 lbs.
•Operating temperature, 90% humidity non-condensing: -40 to +85C
•Storage temperature, -40 to +85C

RTD Embedded Technologies, Inc. | www.rtd.com 9GPS25162HR/GPS35162HR User’s Manual
BDM-610020158 Rev A
1.4 Contact Information
1.4.1 SALES SUPPORT
For sales inquiries, you can contact RTD Embedded Technologies sales via the following methods:
Phone: [phone] Monday through Friday, 8:00am to 5:00pm (EST).
E-Mail: [email protected]
1.4.2 TECHNICAL SUPPORT
If you are having problems with you system, please try the steps in the Troubleshooting section of this manual.
For help with this product, or any other product made by RTD, you can contact RTD Embedded Technologies technical support via the
following methods:
Phone: [phone] Monday through Friday, 8:00am to 5:00pm (EST).
E-Mail: [email protected]

RTD Embedded Technologies, Inc. | www.rtd.com 10 GPS25162HR/GPS35162HR User’s Manual
BDM-610020158 Rev A
2Specifications
2.1 Operating Conditions
Table 2: Operating Conditions
Symbol
Parameter
Test Condition
Min
Max
Unit
Vcc5
5V Supply Voltage
4.75
5.25
V
Vcc3
3.3V Supply Voltage
n/a
n/a
V
Vcc12
12V Supply Voltage
n/a
n/a
V
Ta
Operating Temperature
-40
+85
C
Ts
Storage Temperature
-55
+125
C
RH
Relative Humidity
Non-Condensing
0
90%
%
MTBF
Mean Time Before Failure
Telcordia Issue 2
30°C, Ground benign, controlled
TBD
Hours
2.2 Electrical Characteristics
Table 3: Electrical Characteristics
Symbol
Parameter
Test Condition
Min
Typical
Max
Unit
P
Power Consumption
Vcc5 = 5.0V
TBD
W
Icc5
5V Input Supply Current
Active
TBD
A
PCIe/104 Bus
Differential Output Voltage
0.8
1.2
V
DC Differential TX Impedance
80
120
Ω
Differential Input Voltage
0.175
1.2
V
DC Differential RX Impedance
80
120
Ω
Electrical Idle Detect Threshold
65
175
mV

RTD Embedded Technologies, Inc. | www.rtd.com 11 GPS25162HR/GPS35162HR User’s Manual
BDM-610020158 Rev A
3Board Connection
3.1 Board Handling Precautions
To prevent damage due to Electrostatic Discharge (ESD), keep your board in its antistatic bag until you are ready to install it into your system.
When removing it from the bag, hold the board at the edges, and do not touch the components or connectors. Handle the board in an antistatic
environment, and use a grounded workbench for testing and handling of your hardware.
3.2 Physical Characteristics
STEP model is available upon request; contact RTD Tech Support for more information.
•Weight: Approximately 80 g (0.18 lbs.)
•Dimensions: 90.17 mm L x 95.89 mm W (4.570 in L x 3.775 in W)
Figure 1: Board Dimensions

RTD Embedded Technologies, Inc. | www.rtd.com 12 GPS25162HR/GPS35162HR User’s Manual
BDM-610020158 Rev A
3.3 Connectors and Jumpers
Figure 2: Board Connections
3.3.1 BUS CONNECTORS
CN1(Top) & CN2(Bottom): PCIe Connector
The PCIe connector is the connection to the system CPU. The position and pin assignments are compliant with the PCI/104-Express
Specification. (See PC/104 Specifications on page 22)
The GPS35162 is a “Universal” board, and can connect to either a Type 1 or Type 2 PCIe/104 connector.
CN3: PCI Connector (GPS25162HR Only)
The PCI connector is the connection to PCI peripheral modules. This connector is used only as a pass through connector on this board.
3.3.2 EXTERNAL I/O CONNECTORS
CN7: Serial I/O Connector
CN7 is an RS-232 interface that is connected to the third port of the UART. Table 4 has the pin-out.
CN5: GPS Antenna
CN4: Utility
CN7: Serial
CN3: PCI-104 Connector
(GPS25162HR Only)
CN1 & CN2: PCIe Connector

RTD Embedded Technologies, Inc. | www.rtd.com 13 GPS25162HR/GPS35162HR User’s Manual
BDM-610020158 Rev A
Table 4: CN7 in UART RS-232 Mode
Pin Name
Pin #
Pin #
Pin Name
DSR
2
1
DCD
RTS
4
3
RxD
CTS
6
5
TxD
RI
8
7
DTR
GND
10
9
GND
CN4: Utility Connector
CN4 is the Utility connector. It contains a buffered 1 pulse-per-second with a 6 ns maximum delay, RS-232 level GPS output data and an
external battery connector for GPS module.
Table 5: CN4 Utility
Pin Name
Pin #
Pin #
Pin Name
GND
2
1
RSVD
1PPS
4
3
RSVD
GPS TX
6
5
GND
GND
8
7
External Battery
GND
10
9
RSVD
CN5: GPS Antenna Connector
The GPS35162 provides an MCX connector for the GPS antenna.
Connector Part #: SPC Technology 8589-0853
Example Mating Connector: Amp 901-9877-RFX
Note: CN8 is for Factory Use only
3.3.3 JUMPERS
JP1: GPS Antenna Bias
JP1 is used to select the antenna bias level. The available bias levels are shown in Table 6.
Table 6: JP3 Settings
Setting
Description
Notes
1 –2
5V Bias Antenna
2 –3
3.3V Bias Antenna
Factory default
Open
Passive Antenna
JP2: 1 PPS on Carrier Detect
JP2 is used to connect/disconnect the 1 PPS signal from UART 1 carrier detect. The options are shown in Table 7.
Table 7: JP4 Settings
Setting
Description
Notes
1 –2
1PPS is connected to the UART 1 CD
Factory default
2 –3
1PPS is disconnected from UART 1 CD
3.3.4 LEDS
D1: GPS Fix LED
D1 shows if the GPS has a 3D fix. The LED will be on if the GPS has a fix.
D2: 1PPS LED
D2 shows the status of the GPS’s 1PPS signal.

RTD Embedded Technologies, Inc. | www.rtd.com 14 GPS25162HR/GPS35162HR User’s Manual
BDM-610020158 Rev A
3.4 Steps for Installing
1. Always work at an ESD protected workstation, and wear a grounded wrist-strap.
2. Turn off power to the PC/104 system or stack.
3. Select and install stand-offs to properly position the module on the stack.
4. Remove the module from its anti-static bag.
5. Check that pins of the bus connector are properly positioned.
6. Check the stacking order; make sure all of the busses used by the peripheral cards are connected to the cpuModule.
7. Hold the module by its edges and orient it so the bus connector pins line up with the matching connector on the stack.
8. Gently and evenly press the module onto the PC/104 stack.
9. If any boards are to be stacked above this module, install them.
10. Attach any necessary cables to the PC/104 stack.
11. Re-connect the power cord and apply power to the stack.
12. Boot the system and verify that all of the hardware is working properly.
Figure 3: Example 104™Stack

RTD Embedded Technologies, Inc. | www.rtd.com 15 GPS25162HR/GPS35162HR User’s Manual
BDM-610020158 Rev A
4IDAN Connections
4.1 Module Handling Precautions
To prevent damage due to Electrostatic Discharge (ESD), keep your module in its antistatic bag until you are ready to install it into your system.
When removing it from the bag, hold the module by the aluminum enclosure, and do not touch the components or connectors. Handle the
module in an antistatic environment, and use a grounded workbench for testing and handling of your hardware.
4.2 Physical Characteristics
•Weight: Approximately 0.21 Kg (0.46 lbs.)
•Dimensions: 151.8 mm L x 129.8 mm W x 17.0 mm H (5.98 in L x 5.12 in W x 0.67 in H)
Figure 4: IDAN Dimensions
4.3 Connectors
4.3.1 BUS CONNECTORS
CN1(Top) & CN2(Bottom): PCIe Connector
The PCIe connector is the connection to the system CPU. The position and pin assignments are compliant with the PCI/104-Express
Specification. (See PC/104 Specifications on page 22)
The GPS35162 is a “Universal” board and can connect to either a Type 1 or Type 2 PCIe/104 connector.

RTD Embedded Technologies, Inc. | www.rtd.com 16 GPS25162HR/GPS35162HR User’s Manual
BDM-610020158 Rev A
4.3.2 EXTERNAL I/O CONNECTORS
The figure below shows the pin orientation of the connectors on the IDAN-GPS35162HRS.
Figure 5: IDAN Front Panel
Utility Connector - 9-pin “D” Female Connector
Connector Part #: Amp 1658610-4
Example Mating Connector: Amp 1658608-4
Table 8: IDAN-GPS35162 Utility Connector
IDAN Pin#
Signal
GPS35162 Pin #
1
RSVD
CN4
1
2
RSVD
CN4
3
3
GND
CN4
5
4
External Battery
CN4
7
5
RSVD
CN4
9
6
GND
CN4
2
7
1PPS
CN4
4
8
GPS TX
CN4
6
9
GND
CN4
8
Serial Connector - 9-pin “D” Male Connector
Connector Part #: VALCON DF-9P-CN
Example Mating Connector: Amp 1658610-4
Table 9: IDAN-GPS35162 Serial Connector
IDAN Pin#
Signal(RS-232)
(RS-232)
GPS35162 Pin #
1
DCD
-
CN7
1
2
RxD
RxD-
CN7
3
3
TxD
TxD-
CN7
5
4
DTR
-
CN7
7
5
GND
GND
CN7
9
6
DSR
-
CN7
2
7
RTS
TxD+
CN7
4
8
CTS
RxD+
CN7
6
9
RI
-
CN7
8
Pin 1
Pin 5
Pin 6
Pin 9
Pin 5
Pin 1
Pin 9
Pin 6

RTD Embedded Technologies, Inc. | www.rtd.com 17 GPS25162HR/GPS35162HR User’s Manual
BDM-610020158 Rev A
GPS Antenna - SMA Female Connector
Connector Part #: SPC Technology 8589-0853
Example Mating Connector: Amp 901-9877-RFX
4.4 Steps for Installing
1. Always work at an ESD protected workstation, and wear a grounded wrist-strap.
2. Turn off power to the IDAN system.
3. Remove the module from its anti-static bag.
4. Check that pins of the bus connector are properly positioned.
5. Check the stacking order; make sure all of the busses used by the peripheral cards are connected to the cpuModule.
6. Hold the module by its edges and orient it so the bus connector pins line up with the matching connector on the stack.
7. Gently and evenly press the module onto the IDAN system.
8. If any boards are to be stacked above this module, install them.
9. Finish assembling the IDAN stack by installing screws of an appropriate length.
10. Attach any necessary cables to the IDAN system.
11. Re-connect the power cord and apply power to the stack.
12. Boot the system and verify that all of the hardware is working properly.
Figure 6: Example IDAN System

RTD Embedded Technologies, Inc. | www.rtd.com 18 GPS25162HR/GPS35162HR User’s Manual
BDM-610020158 Rev A
5Functional Description
5.1 Block Diagram
The Figure below shows the functional block diagram of the GPS35162. The various parts of the block diagram are discussed in the following
sections.
Figure 7: GPS35162 Block Diagram
5.2 PCIe UART
The GPS35162 provides a UART interface to the PCIe bus that connects to a GPS and a serial connector CN7. There are four independent
UARTs that are connected as follows:
•UART 1 to GPS
•UART 2 is unused.
•UART 3 to CN7
•UART 4 is unused.
5.2.1 GPS INTERFACE
Integrated on the GPS35162 is a Linx RXM-GNSS-TX, a low power fast-fix 33-channel GPS receiver. This GPS receiver is especially designed
for portable and mobile applications. The Linx RXM-GNSS-TM provides NMEA-0183 version 4.10 data and a 1 PPS signal.
A complete list of NMEA Messages and command messages is available from the manufacturer’s website at www.linxtechnologies.com.
PCIe
UART
PCIe Bus
µP
GPS Module
CN5: GPS
Antenna
PCIe x1
GPS Fix LED
1PPS LED
CN7: Serial
CN4: Utility

RTD Embedded Technologies, Inc. | www.rtd.com 19 GPS25162HR/GPS35162HR User’s Manual
BDM-610020158 Rev A
GPS module interface
The RXM-GNSS-TM GPS is connected to the host computer through a dedicated serial port. The default configuration for the serial port is:
•9600 Baud
•8 Data bits
•No parity
•1 Stop bit
•No Flow Control
GPS Antenna
Most GPS antennas are “active” which means they have a low noise amplifier (LNA) built into the antenna that requires a power source for the
GPS module. While the GPS35162 will work with a passive antenna, better performance will be achieved with an active antenna. The
GPS35162 provides +3.3V/+5V for active GPS antennas.
COCOM Limits
The GPS module disables tracking when both altitude (18,000m) and speed (515 m/s) limits are exceeded. However, the module has an
acquisition altitude limit of 10,000m. So, it cannot be powered on and acquire a position above 10,000m, but it will continue tracking if a position
is acquired below 10,000m and then the module goes higher.

RTD Embedded Technologies, Inc. | www.rtd.com 20 GPS25162HR/GPS35162HR User’s Manual
BDM-610020158 Rev A
6Software
6.1 Installing the Software
The GPS35162 uses a PCIe UART which will require software and drivers for proper operation. Drivers are provided for Windows XP/7, DOS,
and Linux with pre-3.8 kernels. The UART is supported in 3.8+ kernels.
The drivers are provided on the companion CD and are also available on the RTD web site (http://www.rtd.com) for download.
6.2 Software Programming
6.2.1 API INTERFACE
Once the drivers for the GPS35162 have been properly loaded, all ports should be available as standard serial ports. All ports can then be
controlled using the standard serial port interfaces built into the operating system.
A description of serial port programming for operating systems is beyond the scope of this manual. Consult the operating system
documentation for information on how to interface with serial ports via software.
6.2.2 COM PORT NUMBERING
Serial ports (aka COM ports) are typically assigned numbers by the operating system (e.g. COM1). These numbers are typically dynamically
assigned by the operating system. However, different applications may enumerate the COM ports differently, assigning different port numbers
(e.g. COM3-10 vs COM5-12). When developing your own serial port application, consult your operating system’s documentation for the proper
method of enumerating COM ports.
Note: Some applications are written to assume that no more than four COM ports are present in a system. These
applications may have compatibility issues with the Exar PCIe UART.
6.2.3 BASE ADDRESS AND REGISTER MAPPING
The GPS35162 exposes all of the registers available on the Exar XR17V358. The register set of the XR17V358 mimics the standard 16C550
UART register map. However, the XR17V358 contains some additional registers not found in a typical ISA-based UART.
Additionally, the base address of the GPS35162’s serial ports will be different than the standard PC serial port locations (0x3F8, 0x2F8, etc.).
The GPS35162 is a memory mapped device. Since it is PCI-based, it may be mapped to any location within the address space of the CPU.
The base address of PCI devices is determined by the CPU’s BIOS and operating system at boot time.
The register-level differences between the GPS35162 and a standard 16C550 UART should be abstracted via the software drivers. Most users
will not need to concern themselves with the actual registers of the board. If one is interested in directly accessing the registers of the board,
consult the XR17V358 data sheet available from Exar.
6.3 Windows
When using the GPS35162, a terminal emulator can be used to communicate with the GPS. Since HyperTerminal is no longer provided with
Windows, we recommend using Real Term or Tera Term. Default GPS serial settings can be found in the GPS module interface section (page
19). Default sensor interface serial settings can be found in the Error! Reference source not found. section (page Error! Bookmark not
defined.).
NOTE: When using under Windows, the GPS may be incorrectly detected as
a Serial Mouse, causing erratic mouse cursor behavior. This issue
has been documented by Microsoft. For more information, refer to
Microsoft Knowledge Base Article 283063.