Specifications

ManualsBrandsDeLorme ManualsGPSGPS2058

Page 1

General Description

The DeLorme GPS2058 module combines the STMicroelectronics high sensitivity STA2058 (Teseo) GPS

baseband chip with the STA5620 Low Power GPS RF front end to form a complete high performance GPS

receiver module. The GPS2058 is an ideal solution for consumer, Handheld, PND (Portable Navigation),

in-vehicle Navigation and Telematics systems. The GPS2058 is offered with a complete GPS ﬁrmware

which performs all basic GPS operations including tracking, acquisition, navigation and data output with

no need of external memories. SBAS (WAAS and EGNOS) features are also supported.

Features

• Compact 16mm x 16mm footprint minimizes board space

• Very high sensitivity and fast time to x for very accurate position xes in all environments

• Fully Integrated RF Section for direct Interface to Active or Passive Antenna Systems

• GPS Firmware embedded in FLASH eliminates programming

• Standard NMEA0183 output message structure for easy interfacing

• Evaluation kit and Reference Design Available

• Low Power and standby modes for battery powered applications

• PPS Output Synchronized to UTC for Time Synchronization Applications

• Superior Multi-path Error rejection algorithm for optimum performance in urban canyons

• RoHS Compliant

Performance Speciﬁcations

16-channel, L1 (1575.42 MHz) GPS receiver

Reacquisition time 0.1 seconds average

Position Accuracy 2 meters, CEP 50%

Acquisition Time

• Hot Start 2.5 seconds

• Warm Start 34 seconds

• Cold Start 39 seconds

Reacquisition Time <1 second

Altitude <+/35 m vertical in term of 95%

Velocity 0.1 m/s

Functional Description

The DeLorme GPS2058-10 module simpliﬁes embedded applications of GPS-based information systems. The important

components of a basic GPS receiver subsystem are LNA, SAW Filter, RF front end, power conditioning, and the GPS baseband

receiver itself. All these subsystems have been built into the DeLorme GPS module to eliminate the cost and time needed

for the user to develop them independently. In simple terms, the user must connect an active or passive antenna, provide a

power source, and connect the module to a host system via a serial port (or USB) to produce GPS positional data and enable

a complete GPS receiver system. Designed for PCB mounted application, the module has a tiny 16x16mm footprint for use in

small form-factor end applications such as portable systems.

For fast startup times, the Teseo baseband features an onboard 16KB of FLASH memory for storing the satellite almanac and

ephemeris data, and this data is saved and restored automatically as a background process. This eliminates the need for

additional external memory and eliminates any programming to save and recover this data.

The Pulse-Per-Second (PPS) output provides an accurate timestamp, synchronized to Universal Coordinated Time (UTC). The

time is established via communication with one satellite and veried with a second satellite. If a x is obtained and lost the PPS

will continue to run as long as the time is valid. No PPS pulse indicates the time is not valid.

Time (PPS) +/-62ns Accuracy synchronized

to UTC time

DGPS (Optional) <0.5m (depending on

correction technique)

Acquisition Sensitivity -146dBm (warm)

Tracking Sensitivity -159dBm

Velocity <515 m/s (~1,000 knots) Max

Acceleration 4g Max

Altitude <18,000 m (~60,000 ft)

Jerk 20 m/s

DELORME

GPS2058-10

GPS Receiver Module Specification

June 2008

Two DeLorme Drive

Yarmouth, ME 04096

(Phone) 800-293-2389

(Fax) 207-846-7054

www.delorme.com

Summary of content (18 pages)

PAGE 1
Two DeLorme Drive Yarmouth, ME 04096 (Phone) 800-293-2389 (Fax) 207-846-7054 www.delorme.com DELORME GPS2058-10 GPS Receiver Module Specification June 2008 General Description The DeLorme GPS2058 module combines the STMicroelectronics high sensitivity STA2058 (Teseo) GPS baseband chip with the STA5620 Low Power GPS RF front end to form a complete high performance GPS receiver module.
PAGE 2
Module Pinout Pin Descriptions Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 Name Function Description Secondary Function Ground VCC nSTDBYO nSTDBYI WAKEUP nRESET AIN0 AIN1 AIN2 AIN3 VADC V18 n/c n/c n/c PPS GPIO0 GPIO1 GPIO2 GPIO3 GPIO4 GPIO5 USBDP USBDN JTCK JTMS JTDI JTDO nJTRST U0RX U0TX U1RX U1TX TRACKLED n/c n/c BOOTEN RFGND RF-IN RFGND Power Power Output Input Input Input I/O I/O I/O I/O Power Power I/O I/O I/O I/O I/O I/O I/
PAGE 3
Block Diagram Typical Applications Page 3
PAGE 4
Absolute Maximum Ratings Symbol Parameter Value Min Max VDD Voltage on VDD with respect to ground (VSS) -0.3 +4.0 V18 Voltage on optional 1.8V core supply input -0.3 +2.0 VADC Voltage on VADC pin with respect to ground (VSS) -0.3 +3.6 VIN Voltage on any pin with respect to ground (VSS) -0.3 +4.
PAGE 5
Mechanical Diagram GPS2058 RECOMMENDED PC BOARD LAYOUT UNITS MM & [ IN ] .450 11.43 .050 1.27 .068 1.73 .040 1.02 .652 16.56 .020 R0.51 .652 16.56 GPS2058 PACKAGE OUTLINE 14.83±0.05 3.07±0.05 PIN 1 INDICATOR 0.79±0.03 FR4 THICKNESS 40 x R0.33 SOLDERING CASTELATIONS 1.27±0.05 16±0.05 16±0.
PAGE 6
Ordering Information Ordering Code: GM-205810-000 Tape And Reel minimum order quantity: 500 units Tape Dimensions Page 6
PAGE 7
Minimum Application Connectivity The following describes the minimum GPS2058 GPS receiver module connectivity necessary to obtain a position fix with passive antenna and host connection. The Antenna connects to the module on the RF-input pin. It is very important that this connection maintains a 50 ohm impedance with minimal discontinuities to maximize the energy transfer from the antenna to the module RF input.
PAGE 8
Power Supply Options The GPS2058 module can be powered by two different methods. The preferred method will depend on the supply voltages available on the PCB and the power consumption goals of the system. A single external 3.3V supply can be used to power the entire module. When only the external 3.3V supply is used the voltage is down converted inside the module to supply the core 1.8V. Using an external 3.3V supply requires 85mA (typical) of total current for the entire module.
PAGE 9
STANDBY MODE In Standby mode, the CPU core is switched off to reduce power consumption. The Real Time Clock and Wake-Up logic remains independently powered by an internal low-power voltage regulator for fast start-ups coming out of Standby mode. The Standby mode power-down sequence may be initiated by either a software command, or by hardware control using the nSTDBYI and WAKEUP inputs. DO NOT tie the nSTDBYI and WAKEUP pins together if you are using STANDBY mode.
PAGE 10
Hardware STANDBY To enter Standby mode via hardware requires bringing the nSTDBYI pin to a logic low state while the WAKEUP input is low. If the WAKEUP pin is at a high logic level the GPS2058 will not enter Standby mode. To exit standby mode via hardware both the WAKEUP and nSTDBYI pin must be high. The WAKEUP rising edge switches the Main Voltage Regulator back on, while nSTDBYI pin rising edge releases the internal Reset to the CPU core.
PAGE 11
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 system run-time the current message list can be modified using the $PDME,11 (see the NMEA software commands section). A description of the available (NMEA 0183) navigation messages is reported in the next pages.
PAGE 12
$GPGSV Satellites in view, available as soon as the first satellite is acquired. It can be enabled/disabled with the $PDME,11 command. Note that this message is repeated MaxMsg times to report the status of all satellites in view (up to 16 satellites).
PAGE 13
$GPGLL Geographic Position - Latitude/Longitude. It can be enabled/disabled with the $PDME,11 command. Message rate: 1 Hz Message: $GPGLL,,,,,,*checksum Field Description Format Lat Latitude Ddmm.mmm LatRef Latitude direction 'N' or 'S' Lon Longitude Dddmm.mmm LonRef Longitude Direction 'E' or 'W' PosUTC Universal time coordinated Hhmmss.
PAGE 14
Command: Cold Start Format: $PDME,0 Variables: None Return: If monitoring NMEA, the module will issue power-on start-up message (Delorme F/W and H/W versions are displayed), satellite vehicle NMEA message should indicate only 1 satellite (i.e., $GPGSV,1,1…) and the active satellite message will indicate no fix ($GPGSA,A,1…).
PAGE 15
Command: Get Satellite Masking Angle Format: $PDME,7 Variables: None Return: “$PDME,7,” Operation: Returns the angle below which satellites are ignored; returned value is in whole degrees for the current GPS Library.
PAGE 16
Command: NMEA Messaging Configuration Format: $PDME,11,n1,h,n2 Variables: All variables are independent of each other.
PAGE 17
Command: System Control Set A, Return Estimated Position Error Format: $PDME,12,n Variables: n = 5 Return: “$PDME,12,,” Operation: Returns a running statistical estimate of horizontal and vertical positional errors in meters. Application: Useful for general evaluation of accuracy, particularly if a more elaborate data collection tool is not available to collect and analyze the data in more detail.
PAGE 18
Recommended Reflow Profile The following graph shows a suggested reflow profile for an automated surface mount assembly processes. This reflow profile follows the recommendations for the lead-free solder used in the module assembly. The reflow process follows 4 complete stages: Pre-heat: Ramp to 130°C at a rate of 2°C/second Soak: Ramp from 130 to 165°C over 60-150 seconds Reflow: Ramp from 165°C to 217°C at a rate of 2°C/second.