GM-205610-000 DeLorme, GM-205610-000 Datasheet - Page 7

• Manufacturer Part Number: GM-205610-000
• Description: MODULE GPS RCVR GPS2056-10
• Manufacturer: DeLorme

Specifications of GM-205610-000

• Frequency: 1.575GHz
• Data Rate - Maximum: 57.6 kbps
• Modulation Or Protocol: GPS
• Applications: GPS Receiver
• Current - Receiving: 50mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 40 Pin
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Sensitivity: -
• Memory Size: -
• Other names: GM-205610-000TR

2D Fix Algorithm Configuration
Starting with ROM software version 4.30.3+PAL a 2D fix algorithm has been introduced to reduce the TTFF in critical
scenarios (when the number of received satellites is less than 4). In these conditions a less accurate position fix is allowed.
If in the final application, the position accuracy is more important than the time to first fix, the 2D algorithm can be disabled.
A dedicated GPIO can be configured to disable this feature at the system startup (the same action is available also at system
run-time using an NMEA command, see the commands description below).
NMEA Output Messages
When the GPS receiver is running a set of messages is presented on the NMEA port. These output strings are compatible
with the NMEA 0183 standard and provide all the information needed by a navigation system. At the system startup, using a
dedicated configuration pin (see the software configuration section above), it is possible to choose one of the two available
set of messages: a basic message list at baudrate of 4800 and the extended message list at baudrate 57600. In the
extended message list there are some additional ST proprietary messages (not documented below) that have been included for
debug purposes. At system run-time the current message list can be modified using the $PSTMNMEACONFIG or $PSTMRMC
commands (see the NMEA software commands section). A description of the available (NMEA 0183) navigation messages is
reported in the next pages.
$GPGGA
GPS fix data, message available at startup in the default message list. It can be enabled/disabled with the
$PSTMNMEACONFIG
command.
Message rate: 1 Hz
Message: $GPGGA,<PosUTC>,<Lat>,<LatRef>,<Lon>,<LonRef>,<Qual>,<NbSat>,<HDOP>,<AltMsl>,M,<GeoidSep>,M,<null>,
<null>*checksum<cr><lf>
external pull-up
P1_3
External pull-down
Leave unconnected /
Field
PosUTC
Lat
LatRef
Lon
LonRef
Qual
NbSat
HDOP
AltMsl
M
GeoidSep
M
Null
Null
Universal time coordinated
Latitude
Latitude direction
Longitude
Longitude Direction
Quality indicator
0 – no fix
1 – GPS fix
2 – Differential GPS fix
Number of satellites in use
Horizontal dilution of precision
Antenna altitude above/below main sea level
Meters
Geoidal separation
Meters
–
–
Description
Description
2D Fix algorithm is disabled
2D Fix algorithm is enabled
Hhmmss.sss
ddmm.mmmmm
'N' or 'S'
dddmm.mmmmm
'E' or 'W'
X
Xx
x.x
x.x
'M'
x.x
'M'
Format
Default
X
Page 7