V23993-A1037-A VINCOTECH, V23993-A1037-A Datasheet - Page 16

• Manufacturer Part Number: V23993-A1037-A
• Description: GPS Modules & Development Tools GPS Receiver Module Full NMEA (SMD)
• Manufacturer: VINCOTECH
• Type: GPS Moduler

Specifications of V23993-A1037-A

• Operating Voltage: 3.3 V to 3.6 V
• Frequency Range: 1575 MHz
• Operating Temperature Range: - 30 C to + 70 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

For example to set the date to March 25, 2006, the time to 1:05 p.m. and the
location is closed to Munich, Germany the command will look like this:
Please note that the position is accepted only, if the number of digits before and
after the decimal point is correct. For the latitude 4 digits before and 3 digits after
the decimal point are required, for the longitude 5 digits before and again 3 digits
after, respectively.
3.3.1 Avoiding Cold Start Behavior
A1037-A is a ROM based GPS receiver module. Powering down the module will
delete all ephemeris and almanac data in the GPS engine and will end in a cold
start next time the module will be powered on again.
This can be avoided by reading out the ephemeris / almanacs before powering
down the module and reload it after powering up the module again.
Please note: Ephemeris data are valid for 4 hours
3.3.1.1 Dump Ephemeris
This command sends out all ephemeris stored in the backup RAM in this format:
e.g. $PSTMEPHEM,1,3,<byte1>,<byte2>,…,<byteN>*7F
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• $PSTMINITGPS,4804.000,N,01139.000,E,0500,25,03,2006,13,05,00
• $PSTMDUMPEPHEMS
$PSTMEPHEM
1
3
<byte1>
<byte2>
<byteN>
*7F
Almanac data are valid for 3 month
Vendor and message identifier
Satellite ID
Number of the ephemeris data bytes
First byte of ephemeris data
Second byte of ephemeris data
Last byte of ephemeris data
Checksum
Table 9: Ephemeris data output
GPS Receiver Firmware
User’s Manual
A1037
V2.0 - 04/07