USGlobalsat EM-506 User Manual

GLOBALSAT GPS Module

Hardware Data Sheet

Product No : EM-506

User Manual Version 1.7

Globalsat Technology Corporation

16F., No. 186, Jian-Yi Road, Chung-Ho City, Taipei
Hsien 235, Taiwan

Tel: [phone] Fax: [phone]

E-mail : [e-mail]

Website: www.globalsat.com.tw

Issue Date

2014/5/20

APPR

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EM-506
High Performance GPS Module

Product Description

Product Description

EM-506 GPS module features high sensitivity, low power and ultra small form factor. This GPS
module is powered by SiRF Star IV, it can provide you with superior sensitivity and performance
even in urban canyon and dense foliage environment. With SiRF CGEE (Client Generated
Extended Ephemeris) technology, it predicts satellite positions for up to 3 days and delivers
CGEE-start time of less than 15 seconds under most conditions, without any network assistance.
Besides, MicroPower Mode allows GPS module to stay in a hot-start condition nearly continuously
while consuming very little power. EM-506 is suitable for the following applications:

 Automotive navigation
 Fleet management
 Marine navigation

Product Features

 SiRF Star IV high performance GPS Chipset
 Very high sensitivity (Tracking Sensitivity: -163 dBm)
 Extremely fast TTFF (Time To First Fix) at low signal level
 Support UART interface.
 Built-in LNA(with in CHIP)
 Compact size (30.0mm x 30.0 mm x 10.7mm) suitable for space-sensitive application
 Support NMEA 0183 V3.0 (GGA, GSA, GSV, RMC, VTG, GLL, ZDA)
 Support OSP protocol
 Support SBAS (WASS, EGNOS, MSAS, GAGAN)

Note: Features mentioned above are available depending on firmware versions. Please contact us first to specify which features

you will require, before purchase.

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EM-506
High Performance GPS Module

Product Pin Description

PIN Number(s)

Name Type

Description Note

1,5

GND P Ground.

This is the main power supply to the engine

2

VIN P

board. (4.5Vdc to 6.5Vdc)
This is the main receive channel for

receiving software commands to the engine

3 RXD I

board from SiRFdemo software or from user
written software. Baud rate based on flash
memory setting.

This is the main transmits channel for

4

TXD O

outputting navigation and measurement
data to user’s navigation software or user
written software. Output 3.3V level.

This pin output signal based on firmware

6

GPS Status O

setting.*1

*1.The EM-506 supports a 1PPS output, but will not have an LED. If you don't need a 1PPS output but require an LED, then please contact

our sales department for more information

Electrical Specification

Absolute Maximums Ratings

Parameter Min. Typ. Max. Conditions Unit

POWER Supply
Main power supply(VCC) 4.5 5.0 6.5 V

45 50 55 GPS is not 3D Fixed. mA

Main power supply Current

33 34 38 GPS is 3D Fixed. mA

RF
Operating Frequency 1.575 Ghz

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EM-506
High Performance GPS Module

DC Electrical characteristics

Parameter Symbol Min. Typ. Max. Conditions Units

Low Level Output Voltage VOL 0.4 V

High Level Output Voltage

Low Level Input Voltage VI L -0.4 0.45 V

High Level Input Voltage VI H 1.26 3.6 V

Low Level Output Voltage VOL 0.4 Without LED V

Low Level Output Voltage VOL 0.8 With LED V

High Level Output Voltage VOH 3.3 V

Low Level Input Voltage VI L -0.4 0.45 V

High Level Input Voltage VI H 1.26 3.6 V

Receiver Performance

Sensitivity

Time-To-First-Fix

VOH 3.3 V

Tracking :
Autonomous acquisition :

Cold Start – Autonomous

1

Warm Start – Autonomous

Hot Start – Autonomous

2

3

-163dBm

-160 dBm

< 35s

<15s (with CGEE)

< 35s

< 15s(with CGEE)

< 1s

Horizontal Position Accuracy

Velocity Accuracy

Reacquisition 0.1 second, average

Update Rate 1 Sec / 5 Sec

Maximum Altitude < 18,000 meter

Maximum Velocity < 515 meter/ second

Maximum Acceleration < 4G

<Note>

1. 50% -130dBm Fu 0.5ppm Tu ±2s Pu 30Km

2. Commanded Warm START

3. Commanded Hot START

4. 50% 24hr static, -130dBm

5. 50% @ 30m/s

4

Autonomous < 2.5m

Speed

5

Heading

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< 0.01 m/s

< 0.01 degrees

EM-506
High Performance GPS Module

Environmental Characteristics

Parameter Min Typ Max Unit
Humidity Range 5 95 % non-condensing

Operation Temperature -40 25 85

Storage Temperature -40 85

℃
℃

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EM-506
High Performance GPS Module

Physical Characteristic

OPERATING Description

GND

This is Ground pin for the baseband circuit.

VIN

This is the main power supply to the engine board. (4.5Vdc to 6.5Vdc)

RXD

This is the main channel for receiving software commands from SiRFdemo software or from your
proprietary software.

TXD

This is the main transmits channel for outputting navigation and measurement data to user’s
navigation software or user written software. Output is TTL level, 0V ~ 3.3V.

GPS status

This pin exports signal to indicate the GPS status.
GPS unfix: always low level.
GPS fixed: one second high level, one second low level.

LED

LED indicator for GPS fix or not fix
LED OFF: Receiver switch off
LED ON: No fixed, Signal searching
LED Flashing: Position Fixed

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