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PmodGPS™ Reference Manual
Revised April 12, 2016
This manual applies to the PmodGPS rev. A
Overview
The PmodGPS can add satellite positioning accuracy to any embedded system. The PmodGPS features a GlobalTop
FGPMMOPA6H GPS antenna module that utilizes the MediaTek GPS MT3329.
The PmodGPS.
1
Functional Description
The PmodGPS uses a standard 6-pin port and communicates via a 2-wire Universal Asynchronous
Receiver/Transmitter (UART.) The PmodGPS also has a 2-pin port for control of the NRST pin to the module and the
Radio Technical Commission for Maritime services, or RTCM pin for Differential Global Positioning System (DGPS)
data using RTCM protocols.
Note: The PmodGPS arrives with the RTCM feature inactive, to enable RTCM capabilities users should contact
GlobalTop at: www.gtop-tech.com.
DOC#: 502-237
Other product and company names mentioned may be trademarks of their respective owners.
Features include:
Copyright Digilent, Inc. All rights reserved.
1300 Henley Court
Pullman, WA 99163
www.digilentinc.com
Ultra-sensitive GPS module (-165 dBm)
Add 3m 2D satellite positioning
accuracy to any embedded system
Low power consumption
Up to 10Hz update rate
NMEA (default) and RTCM protocols
available
Small PCB size for flexible designs 2.0 in
× 0.8 in (5.0 cm × 2.0 cm)
6-pin Pmod port with UART interface
Library and example code available
in
resource center
509.334.6306
Page 1 of 6
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Table of Contents
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Summary of Contents for Digilent PmodGPS
- Page 1 The PmodGPS uses a standard 6-pin port and communicates via a 2-wire Universal Asynchronous Receiver/Transmitter (UART.) The PmodGPS also has a 2-pin port for control of the NRST pin to the module and the Radio Technical Commission for Maritime services, or RTCM pin for Differential Global Positioning System (DGPS) data using RTCM protocols.
- Page 2 A hot start takes three to five seconds and a warm start varies depending on how long the module has sat unpowered. Users can hot start the PmodGPS only if it has acquired a fix within approximately the last two hours and with accessible backup power (coin cell battery) connected to the coin cell retainer.
- Page 3 Each NMEA message begins with a ($) dollar sign. The next five characters are the talker ID and the arrival alarm. The PmodGPS talker ID is “GP” and the arrival alarm is the specific sentence output descriptor. Individual comma separated data fields follow these five characters. After the data fields there is an asterisk followed by a checksum.
- Page 4 Satellite Used (Ch12) 2.32 PDOP 0.95 HDOP 2.11 VDOP Checksum <CR><LF> End of message indicator Table 3. GSA. Copyright Digilent, Inc. All rights reserved. Page 4 of 6 Other product and company names mentioned may be trademarks of their respective owners.
- Page 5 Mode (see GlobalTop manual) Checksum <CR><LF> End of message indicator Table 5. RMC. $GPRMC,064951.000,A,2307.1256,N,12016.4438 0.03 165.48 260406 3.05 A*55<CR><LF> Copyright Digilent, Inc. All rights reserved. Page 5 of 6 Other product and company names mentioned may be trademarks of their respective owners.
- Page 6 The pins on the pin header are spaced 100 mil apart. The PCB is 2.0 inches long on the sides parallel to the pins on the pin header and 0.8 inches long on the sides perpendicular to the pin header. Copyright Digilent, Inc. All rights reserved. Page 6 of 6...
- Page 7 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Digilent 410-237P 410-237...
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