I-Lotus RX Oncore Manual de usuario

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Contents

Page

1Introduction..................................................................................................................................................................... 1

1.1 Overview................................................................................................................................................................ 1

1.2 Key Features ......................................................................................................................................................... 1

2Performance Specifications ........................................................................................................................................... 2

3Hardware Overview......................................................................................................................................................... 4

3.1 Overview................................................................................................................................................................ 5

3.2 Feature Summary.................................................................................................................................................. 5

3.3 Hardware Interface Overview................................................................................................................................. 6

3.4 Power Modes......................................................................................................................................................... 6

3.4.1 Tracking................................................................................................................................................................. 6

3.4.2 Sleep mode............................................................................................................................................................ 7

3.4.3 Standby ................................................................................................................................................................. 7

3.5 GPS Antenna detection.......................................................................................................................................... 7

3.6 Inbuilt Module Information...................................................................................................................................... 8

3.7 Satellite Based Augmentation System (SBAS)....................................................................................................... 8

3.8 NMEA Protocol Support......................................................................................................................................... 8

4Module Pin Layout .......................................................................................................................................................... 9

5Pin Definition..................................................................................................................................................................10

6Mechanical Dimensions.................................................................................................................................................12

7Packaging Detail.............................................................................................................................................................13

8Electrical Specifications ................................................................................................................................................14

8.1 VCC..................................................................................................................................................................... 14

8.2 VBATT................................................................................................................................................................. 15

9Antenna circuitry............................................................................................................................................................16

9.1 GPS Antenna detection........................................................................................................................................ 17

10 SBAS...............................................................................................................................................................................18

10.1 Available SBAS Satellites..................................................................................................................................... 19

10.2 Supported commands.......................................................................................................................................... 20

10.3 Effectiveness ....................................................................................................................................................... 20

11 Module Installation Considerations ..............................................................................................................................22

11.1 Electrostatic Precautions...................................................................................................................................... 22

11.2 Electromagnetic Considerations........................................................................................................................... 22

11.3 RF Shielding........................................................................................................................................................ 22

11.4 RoHS Consideration ............................................................................................................................................ 23

11.5 SMT Reflow Profile .............................................................................................................................................. 23

12 Module Packaging..........................................................................................................................................................24

12.1 Tape-and-reel Packaging..................................................................................................................................... 24

12.2 Carrier Tape Details............................................................................................................................................. 25

12.3 Plastic Reel Detail................................................................................................................................................ 26

13 Handling, Shipment & Storage......................................................................................................................................27

13.1 Handling............................................................................................................................................................... 27

13.2 Shipment:............................................................................................................................................................. 28

13.3 Storage................................................................................................................................................................ 30

14 Reference Design...........................................................................................................................................................31

15 Hardware Recommendations ........................................................................................................................................32

15.1 Oncore Silver GPS Active Antenna...................................................................................................................... 32

15.2 Technical Specifications....................................................................................................................................... 33

15.3 Block Diagram...................................................................................................................................................... 34

15.4 Antenna Gain Pattern........................................................................................................................................... 35

15.5 Mechanical Dimensions ....................................................................................................................................... 37

15.6 Antenna Placement.............................................................................................................................................. 37

16 Ordering Information......................................................................................................................................................38

Document Number: 403 –GPS –070 Page | 1

1 Introduction

1.1 Overview

The RX Oncore is a high performance GPS receiver featuring the ALL NEW Smart-StartTM Technology and

supporting AGPS and SBAS augmentation systems. With a sensitivity of up to -159 dBm, this industrial grade

receiver features Auto-Startup and is capable of tracking 16 satellites simultaneously. This cost effective solution is

custom designed to be applied in an extensive variety of GPS applications where superior performance, precise

location, reliability and easy integration are paramount.

Extending the intelligence, quality, and market impact our current technological advances have on the industry, the

RX Oncore uniquely defines a balance between high-performance and cost-effectiveness in the development of this

complete and vastly flexible GPS receiver.

1.2 Key Features

Fig. 1.1 RX Oncore module

Miniature Size (17.0 x 22.4 x 3.0mm) 1

Low Power Consumption

Tracking Sensitivity up to -159 dBm

16 satellite simultaneous tracking

Auto NMEA output

1/30 to 4Hz Configurable Output Rate

Horizontal Accuracy of <2.0m (Unassisted

2D Position accuracy)

Supports AGPS, SBAS (WAAS, EGNOS,

MSAS)

Supports UART, USB, SPI2, CAN2interfaces

RoHS Compliant

1With shield

2Optional

Document Number: 403 –GPS –070 Page | 2

2 Performance Specifications

PARAMETERS

SPECIFICATIONS

General Characteristics

Receiver Architecture

16 Channels

L1 1575.42 MHz

C/A Code (1.023 MHz chip rate)

Code plus carrier tracking (carrier aided tracking)

Signal Tracked

L1, C/A Code, AGPS, SBAS (WAAS, EGNOS, MSAS)

Tracking Capability

16 simultaneous satellite vehicles

Dimensions

Length

17.0 mm

Width

22.4 mm

Height

3.5 mm (with shield)

Shielded

Yes

Performance Characteristics

Acquisition Time (TTFF)

Autonomous Mode

Cold Start

< 32.0 s

Warm Start

< 21.0 s

Hot Start

< 1.5 s

Accuracy

Autonomous Mode

Horizontal Position Error at 50% probable

< 2.5 m, 1-sigma

< 2.0 m, SBAS

Altitude

-1,500 m to 18,000 m

Velocity

515 m/sec

Sensitivity

Acquisition

-146 dBm

Tracking

-159 dBm

Max Update Rate

4 Hz

1PPS Timing

Not Supported

Electrical Characteristics

Main Power Supply (Vcc)

Voltage Range

3.0 to 3.6 VDC : (Nominal 3.3 VDC)

Power Consumption

Acquisition Mode

75 mA @3.3V

Standby Mode

55 uA @3.3V

Digital I/O Interface (VIO=3.3V)

Input High Voltage (VIH)

0.7*VCC to VCC+0.3V

Input Low Voltage (VIL)

-0.3 to 0.3*VCC

Input Hysteresis CMOS Schmitt Trigger

Min. 400mV

Output High Voltage @ 4mA (VOH)

Min. VCC-0.8V

Output Low Voltage @ 4mA (VOL)

Max. 0.4V

Document Number: 403 –GPS –070 Page | 3

Interface

Communication port

UART

USB

SPI (Optional)

CAN (Optional)

Antenna

Support Active/Passive

Both

Bias Voltage : 3.0 ~ 5.5V (6V max)

Bias current : 120mA

Antenna Sense Circuit

Output Sentences

Latitude, longitude, height, velocity, heading, time

NMEA 0183 (GGA, GLL, GSA, GSV, RMC, VTG, ZDA)

Commands Supported

STM NMEA

i-Lotus NMEA

Environmental Characteristics

Operating Temperature

-40 to +85⁰C

Storage Temperature

-40 to +105⁰C

Humidity (Moisture)

Humidity RH(1'25g/m3)

ROHS compliant

Yes

RTC

32.768KHz RTC

Internal

Standard Features

NMEA Output

Auto NMEA output up to 1Hz

Setup Configuration

Saved to flash (non-volatile memory)

Memory

Built-in flash memory (256 KB + 16 KB)

Document Number: 403 –GPS –070 Page | 4

3 Hardware Overview

Below is a simplified functional block diagram of the RX Oncore receiver.

LNA

RFIN

ANTDET

TCXO

RF Circuitry

Clock

Generator SPI

Bus

RF Front-End

SAW Filter

RF Gnd

RX Oncore Module

Antenna Protection

& Sensing Circuitry

Antenna Sensing

Circuit

Fault

VANT

ANTDET

VANT

Digital Gnd

Antenna

LNA

Active Antenna

Fig 3.1 Functional Block Diagram

Document Number: 403 –GPS –070 Page | 5

3.1 Overview

By combining the ARM7TDMI microcontroller core with on-chip Flash and RAM, 16-Channel correlator DSP, RF

Front-end and an extensive range of interfaces on a single module solution, the RX Oncore provides a highly-

flexible and cost-effective solution for any GPS application.

3.2 Feature Summary

ARM7TDMI 16/32 bit RISC CPU based host microcontroller running at a frequency up to 66 MHz.

Complete Embedded Memory System:

FLASH 256 Kbytes + 16 Kbytes (100K erasing/programming cycles)

RAM 64 Kbytes.

16 channel High performance GPS correlation DSP

ST Proprietary Technology:

CMOS Flash Embedded Technology for Baseband

BiCMOS Sige for Radio Front-end

-40oC to 85oC Operating temperature range

SBAS (WAAS and EGNOS) supported

Power Supply:

3.0V to 3.6V operating supply range for Input/output periphery

3.0V to 3.6V operating supply range for A/D Converter reference

1.8V operating supply range for core supply provided by internal Voltage Regulator

2.7V operating supply range for RF Front-end section

Reset and Clock Control Unit able to provide low power modes:

Real time clock module with 32KHz low power oscillator and separate power supply to continue running

during stand-by mode.

16-bit Watchdog Timer with 8 bits prescaler for system reliability and integrity.

Extensive Range of Interface:

Serial Communication Interfaces (UART) allow full duplex, asynchronous, communications with

external devices, independently programmable RX and RX baud rates up to 625K.

Document Number: 403 –GPS –070 Page | 6

Serial Peripheral Interface (SPI) allows full duplex, synchronous communications with external devices,

slave operation, maximum baud rate of 5.5Mb/s.

USB unit V1.1 compliant, software configurable endpoint setting, USB Suspend/Resume support.

Controller Area Network Interface (CAN) compliant with the CAN specification V2.0 part B (active) and

bit rate can be programmed up to 1 MBaud. (Optional, with this option, this feature shares the same

hardware pins as USB interface)

Inter-IC Interface (I2C) Interface provides multi-master and slave functions, support normal and fast

I2C mode (400 KHz), 7/10 bit addressing modes. (Optional)

RF Front-end Features:

LOW IF (4MHz) architecture

Compatible with GPS L1 signal

VGA Gain internally regulated

On-chip programmable PLL

3.3 Hardware Interface Overview

The RX Oncore GPS module uses the STA8058 fully embedded GPS engine core chip set. This chipset features 64KB

RAM and 256 KB + 16 KB Flash Memory in a single chip BGA package.

The GPS IC contains a 66-MHz ARM7TDMI 32 bit processor. The RX Oncore uses an internal frequency synthesizer

to create all internal clocks from the 16.368MHz GPS clock. A 32 KHz oscillator is utilized as the real-time-clock

(RTC).

3.4 Power Modes

Software command to drive the device to sleep mode (low power wait for interrupt).

RF will be disabled when device enters sleep mode and is enabled when it wakes up.

To wake up, a command is sent through UART.

Wake up procedure: send any command and wait for device response.

3.4.1 Tracking

Upon power up, the RX Oncore will run in Full Power Mode, and will immediately search for all visible satellites

available.

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