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PDF GPSM001 Data sheet ( Hoja de datos )
| Número de pieza | GPSM001 | |
| Descripción | OEM GPS Receiver Module | |
| Fabricantes | rfsolutions | |
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OEM GPS Receiver Module
GPSM001
XE1610-OEMPVT
OEM GPS Receiver
Reference Design 2.0
GENERAL DESCRIPTION
The XE1610-OEMPVT GPS Receiver from RF
Solutions is a GPS receiver product which features the
revolutionary FirstGPS™ architecture. This complete
GPS receiver solution provides high accuracy position
and speed performance as well as high sensitivity and
tracking capabilities in urban areas. The GPS Receiver
comes in a small form factor package. The XE1610-
OEMPVT delivers major advancements in GPS
performance, accuracy, integration, computing power
and flexibility. It is designed to simplify the embedded
system integration process.
The FirstGPS is a mixed hardware/software
architecture based on the XE16BB10 advanced
channel correlator IC and its companion RF down-
converter.
APPLICATIONS
• Automotive
• Asset management/tracking
• Palmtop, Laptop, PDA
• Location Based Services enabled devices
• Handheld receivers
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KEY FEATURES
• High sensitivity: to -143 dBm tracking, superior
urban performance.
• Position accuracy: < 5m CEP (50%) without SA
(horizontal)
• Warm Start is under 40 seconds (50%)
• Hot Start is under 12 seconds (50%)
• Ultra low power: < 20 mA @ 3.3V full power, 3
additional low power modes
• Embedded ARM7TDMI
• Small form factor and low cost solution
• Ready-to-plug solution, fully autonomous PVT
solution. Easily integrated into existing systems
• On-board RAM for GPS navigation data, on-board
Flash memory back-up
• PPS output
• Bidirectional NMEA interface
• Real Time Clock with separate back-up power
supply
REFERENCE
XE1610-OEMPVT 2.0
DS031-2 Jan ‘04
©2003 RF Solutions Ltd, www.rfsolutions.co.uk
Tel 01273 898000 Fax 01273 480661
Page 1
1 page  
OEM GPS Receiver Module
GPSM001
INTERFACE DEFINITION, PRINCIPLES OF OPERATION
DATA INTERFACE
VCC – This the main power supply
GND – This the power and signal ground
VRTCBK – This is the back-up supply for the on-board hardware Real Time Clock
All I/Os on the Data Interface are related to VCC and GND levels.
ON/OFF - The ON/OFF input pin control whether the GPS engine is turned ON or OFF. If this pin is “high” whenever a
reset condition occurs or if it is turned “high” when in operation, then the GPS engine is turned on. If this pin is “low”
whenever a reset condition occurs then the GPS engine is not started. If this pin is turned “low” when in operation then
the GPS engine is turned off. When ON/OFF is “low”, the on/off state can be superseded with the PXEMaRT
manufacturer specific NMEA command on RXA, as defined hereafter. This input pin has a pull-up resistor.
RXA – Serial Receive data. This input pin has a pull-up resistor.
TXA – Serial Transmit data
USPED – Hardware Baud rate selection
The Serial NMEA data port (lines RXA and TXA) is an asynchronous serial port (UART). Upon reset, if the USPED input
pin is “low” the setting for this port is defined by the set A of UART parameters #1 to 4 in the Default Parameters Table
*, or if USPED is “high” the setting is defined by the set B. This setting can be modified with the PXEMaPT manufacturer
specific NMEA command defined hereafter. This input pin has a pull-up resistor. There is no flow control on the UART.
(*) see the Default Settings section below
PPS - The PPS output pin is Pulse Per Second highly accurate timing signal generated by the on-board GPS baseband
processor. The PPS signal is available only when the receiver does position fixes. Otherwise its output level is “low”.
After a reset condition, the setting for this port is defined in the Default Parameters Table *, parameter #12. This setting
can be modified with the PXEMaPS manufacturer specific NMEA command defined hereafter.
(*) see the Default Settings section below
1 second
~ 83 ms.
RESETN – Manual Reset input pin. The receiver has 2 reset conditions: first, on power-on, thanks to an on-board
Power On Reset circuitry; and second an external reset when the RESETN pin is “low”. This input pin has a pull-up
resistor.
ALMRDY – When in Active mode, this output indicates the on-board Almanac status. Upon start up and whenever the
Almanac data is tested invalid or not up-to-date the output level is “low. If test is valid and up-to-date the output level is
“high”.
STANDBYN – This input sets the receiver in Stand-by mode when its level is “low”. Otherwise the receiver is either in
Active or Power Save modes. See below, under Operating modes for details. This input pin has a pull-up resistor.
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DS031-2 Jan ‘04
©2003 RF Solutions Ltd, www.rfsolutions.co.uk
Tel 01273 898000 Fax 01273 480661
Page 5
5 Page 
OEM GPS Receiver Module
GPSM001
$PXEMmaa,x1,x2,x3,x4,….,xN*hh
where m – command type: ‘Q’ for ‘query’, ‘S’ for ‘set’, ‘R’ for ‘response’; aa – proprietary command identifier (see
below); x1…xN – data parameters (only for set and query response commands); hh – command checksum
NOTE: Each of the data parameters must be preceded with a comma, except for the aa command identifier, and the
checksum which is preceded with a checksum delimiter character ‘*’.
• QUERY command: to send a query command, no data fields are transmitted. The following format is used:
$PXEMQaa*hh
• RESPONSE command to QUERY: for a query command, a response command with all fields is transmitted. The
following format is used:
$PXEMRaa,x1,x2,x3,x4,….,xN*hh
• SET command: to send a set command, x1…xN must contain valid values. The following format is used:
$PXEMSaa,x1,x2,x3,x4,….,xN*hh
• RESPONSE command to SET: for a set command, a status response command is transmitted. The following format is
used:
$PXEMRaa,s*hh
where s is the status of the requested action: ‘A’ if the action was successful; ‘V’ otherwise.
The following proprietary NMEA command identifiers are implemented:
DI – Diagnostic Message
This command outputs a diagnostic string. It is used to report various error conditions. This is a response-only
command.
$PXEMRDI,ccccccc*hh
where ccccccc is a diagnostic string up to 50 characters
NM – Command Mask and Automatic Output Rate
This command configures the application to automatically output standard NMEA commands at a specified time
interval.
$PXEMaNM,xxxx,xx*hh
Name
Message ID
Mask
Rate
<CR><LF>
Example
Units
$PXEMaNM
0008
01 sec
Description
Proprietary NM protocol header, a-mode (S = set;
R = response)
xxxx Output command mask, hex value (see
Notes below)
xx Automatic output command rate (00 to 99)
End of message termination
Table 12 NM Data Format
Notes: xxxx is a hexadecimal value representing a 2-byte bit-mask where a specific bit sets or clears automatic output
of a particular NMEA command according to the table below. The mask is derived by combining all bits which represent
the NMEA commands which will be automatically output. For example, to automatically output GGA, GSA, ZDA, and
RMC, the bits 0, 4, 5, and 8 are set to 1 in a 2-byte mask, resulting in a hex value 0x131 (0x1+0x10+0x20+0x100). This
value is sent as an ASCII string ‘0131’ in the xxxx field of the NM command.
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NMEA
xxxx
Command
GGA
GLL
VTG
Bit#
0
1
2
Field value
0001
0002
0004
DS031-2 Jan ‘04
©2003 RF Solutions Ltd, www.rfsolutions.co.uk
Tel 01273 898000 Fax 01273 480661
Page 11
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet GPSM001.PDF ] | |
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