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PDF IT530M Data sheet ( Hoja de datos )
| Número de pieza | IT530M | |
| Descripción | OEM GNSS receiver module | |
| Fabricantes | Fastrax | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de IT530M (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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Rev. 1.0
Data Sheet
Fastrax IT530M
This document describes the electrical connectivity and functionality of the Fastrax IT530M
OEM GNSS Receiver.
August 14, 2012
Fastrax Ltd
1 page  
Page 5 of 35
5.2 DC Electrical specifications........................................................................................................................ 20
5.3 AC Electrical characteristics ...................................................................................................................... 21
6 Manufacturing ................................................................................................................................................... 22
6.1 Assembly and Soldering ............................................................................................................................ 22
6.2 Moisture sensitivity................................................................................................................................... 22
6.3 Marking ..................................................................................................................................................... 22
6.4 Tape and reel ............................................................................................................................................ 23
6.5 Environmental Specification ..................................................................................................................... 23
7 Reference design ............................................................................................................................................... 24
7.1 Reference circuit diagram ......................................................................................................................... 24
7.2 PCB layout suggestion ............................................................................................................................... 26
7.2.1 Other electronics on mother board...................................................................................................... 26
7.2.2 Avoiding EMI ......................................................................................................................................... 27
8 AP530 Application board for IT530M ................................................................................................................ 28
8.1 Board Terminal I/O-connector .................................................................................................................. 28
8.2 Bill of materials ......................................................................................................................................... 29
8.3 AP530 Circuit diagram............................................................................................................................... 31
8.4 AP530 layout and assembly ...................................................................................................................... 32
2012-08-14
IT530M_Datasheet
5 Page 
Page 11 of 35
The module can control the embedded VDD power switch autonomously only after the IT530M is set to Periodic,
Backup or to AlwaysLocate™ mode by a NMEA command.
Note also that first fix position accuracy can be somewhat degraded in Power Management Modes when
compared to Full Power operation. User can improve the position accuracy by taking the 2nd or 3rd fix after waking
up.
User can exit low power Modes 3… 4 to Full Power by sending NMEA command $PMTK225,0*2B just after the
module has woke up from previous sleep cycle.
3.4 Self-Assistance EASY™ usage
The IT530M module self-assistance (Support TBD) uses EASY™ (Embedded Assist System) ephemeris extension,
which is embedded in the software without any resources required from the host. The EASY™ data is stored on
internal flash memory and allows fast TTFF typ. 3 seconds over 3 days and is enabled by default.
Allow the receiver to navigate at least for 5 minutes with good GNSS satellite visibility in order to collect broadcast
ephemeris and to process necessary information.
3.5 Server Assistance EPO™ usage
The IT530M module supports also input from server generated EPO™ file (Extended Prediction Orbit, i.e.
ephemeris extension for GPS signals only), which can be transferred from a FTP server and allows fast TTFF with
GPS signal typ. 10 seconds over 7/14 days. Contact Fastrax support for details on EPO FTP server usage.
3.6 Logger LOCUS usage
The IT530M module supports (Support TBD) embedded logger function called LOCUS and when enabled it can log
position information to internal flash memory; default log interval is 15 seconds that provides typically > 16 h log
capacity. The LOCUS can be enabled by NMEA command $PMTK185,0*22. Contact Fastrax support for details on
Locus usage, see ref (3).
3.7 DGPS usage
By default DGPS/SBAS navigation mode is enabled. The search for suitable SBAS satellite signal is automatic.
The host may either enable DGPS/RTCM navigation mode by sending command ‘Set DGPS Data Source to RTCM’
$PMTK301,1*2D. The UART Port1 is used for RTCM message input at 9600 baud.
Note that DGPS usage is only supported with GPS system at 1 Hz navigation rate in Full Power mode. Note also
that acquiring necessary DGPS correction parameters may take up to 1 minute prior DGPS fix status is achieved,
which is indicated in the $GPGGA message, Fix Valid Indicator. Note also that DGPS corrections do not provide
corrections against multipath errors that are local; thus accuracy is not necessary improved in urban
environments.
3.8 Backup State
Backup State means a low quiescent (10 µA typ. at VDD_B) power state where receiver operation is stopped; only
the backup supply VDD_B is powered on while the main supply VDD is switched off by host (or autonomously by
IT530M, see also chapter 3.3). Waking up from Backup State to Full Power is controlled by host by switching on
the VDD supply.
After waking up the receiver will use all internal aiding like GNSS time, Ephemeris, Last Position etc. resulting to a
fastest possible TTFF in either Hot or Warm start modes.
During Backup State the I/O block is powered off; thus suggestion is that host shall force it’s outputs to low state
or to high-Z state during Backup state to minimize small leakage currents (<10 µA typ.) at receiver’s input signals.
2012-08-14
IT530M_Datasheet
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet IT530M.PDF ] | |
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