Digilent 410-237P - Manual (Page 3)

PmodGPS Reference Manual
www.digilentinc.com page 3 of 4
command list, or see their FAQ for how to
change the baud rate.
Table 1: Interface Connector Signal
Descriptions
Connector J1
Pin Signal Description
1 3DF 3D-Fix Indicator
2 RX Receive
3 TX Transmit
4 1PPS 1 Pulse Per Second
5 GND Power Supply Ground
6 VCC Power Supply (3.3v)
Connector J2
Pin
Signal Description
1 ~RST Reset (active low)
2 RTCM DGPS data pin (contact
GlobalTop for use)
Note: Refer to the GlobalTop Gms-U1LP
datasheet at
www.gtop-tech.com for more
information on the GPS module interface.
Output Sentences
Table 2: GGA
$GPGGA,064951.000,2307.1256,N,12016.4438,
E,1,8,0.95,39.9,M,17.8,M,,*65
Example Description
$GPGGA Message ID
064951.000 UTC Time (hhmmss.sss)
2307.1256 Latitude (ddmm.mmmm)
N N/S indicator
12016.4438 Longitude (dddmm.mmmm)
E E/W indicator
1 Position Fix Indicator
8 Satellites used
0.95 HDOP
39.9 MSL Altitude
M Units
17.8 Geoidal Separation
M Units
Age of Diff. Corr.
*65 Checksum
End of message indicator
Table 3: GSA
$GPGSA,A,3,29,21,26,15,18,09,06,10,,,,,
2.32,0.95,2.11*00
Example Description
$GPGSA Message ID
A Mode1 (see GlobalTop manual)
3 Mode2 (see GlobalTop manual)
29 Satellite used (CH1)
21 Satellite used (CH2)
….
Satellite Used (Ch12)
2.32 PDOP
0.95 HDOP
2.11 VDOP
*00 Checksum
End of message indicator
Table 4: GSV
$GPGSV,3,1,09,29,36,029,42,21,46,314,43,
26,44,020,43,15,21,321,39*7D
Example Description
$GPGSV Message ID
3 Number of Messages
1 Message Number
09 Satellites in View
29 Satellite ID (CH1)
36 Elevation (CH1)
029 Azimuth (CH1)
42 SNR (C/No)
….
15 Satellite ID CH(4)
21 Elevation (CH4)
321 Azimuth (CH4)
39 SNR (C/No)
*7D Checksum
End of message indicator