USGlobalsat EB-5318RE User Manual

2012/8/31

1

GLOBALSAT GPS Engine Board

Hardware Data Sheet

Product No : EB-5318RF

Version 0.1

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

2011/10/4

APPR

Ray

CHECK

PREPARE

Luwalk

2012/8/31

2

Product Description

Product Description

EB-5318RF 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. EB-5318RF is suitable for the following applications:

 Automotive navigation
 Personal positioning
 Fleet management
 Mobile phone navigation
 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/I2C interface( Default UART)
 Built-in LNA(with in CHIP)
 Compact size (15.2mm * 14 mm * 2.4mm) suitable for space-sensitive application
 One size component, easy to mount on another PCB board
 Support NMEA 0183 V3.0 (GGA, GSA, GSV, RMC, VTG, GLL, ZDA)
 Support OSP protocol
 MEMS Support : 3-axis Magnetometer for compass heading for “Point and Tell” feature
 MicroPower Mode(MPM) : Reduce MPM current consumption from <500 uA to < 125 uA
 Support SBAS (WASS, EGNOS, MSAS, GAGAN)

2012/8/31

3

Product Pin Description

PIN Number(s)

Name

Type

Description

Note

1,3,9,18,19

GND

P

Ground.

2

RF IN

RF

GPS antenna input

4

RESET_N

I

System reset (active low)

5

VCC

P

Main power supply to the engine board.

6

V_BAT

P

Backup battery supply voltage

7,8

NC

EB-5318RF reverse pin

10

BOOTSEL

I

Set this pin to high for programming flash.

11

TXD

O

This is the main transmits channel for
outputting navigation and measurement data
to user’s navigation software or user written
software. Output TTL level, 0V ~ 2.85V.

12

RXD

I

This is the main receive channel for receiving
software commands to the engine board from
SiRFdemo software or from user written
software.

13

DR_I2C_DIO

I/O

14

DR_I2C_CLK

I/O

Host I2C Interface.
Support MEMS Sensor , 1.8V Level

1,4

15

TIMEPULSE

O

One pulse per second output.(1PPS)

16

ON_OFF

I

ON_OFF pin is used to command the
EB-5318RF to turn on or off

2

17

WAKE_UP

O

System power on, 1.8V output .

3

<Note>

2012/8/31

4

1. GPIO is 1.8V Level

2. The ON_OFF pin commands the EB-5318RF ON or OFF. The turn ON command is a
hardware feature of the Power Control FSM when sensing a rising edge on the pin. The turn
OFF command is a software feature based on interrupts related to rising and/or falling edges
and/or sensing of pin levels.

3. The WAKE_UP pin is an output from the EB-5318RF used to enable an external PMIC. A low
on this output indicates that the EB-5318RF is in one of its low-power states (KA-only,
Hibernate, or Standby mode) and requires no more than 60µA of current on the VIO_18 input.
A high on this output indicates that the EB-5318RF is in operational mode requiring an external
regulator to provide enough current on both the VIO_18 and VREG_18 inputs to handle the
peak current requirements of the EB-5318RF.

4. The DR mode I2C interface provides support for dead reckoning (DR) and code upload. The
port has 2 pins, DR_DIO and DR_CLK, both pins are pseudo open-drain and require pull-up
resistors on the external bus.

Electrical Specification

Absolute Maximums Ratings

Parameter

Min.

Typ.

Max.

Conditions

Unit
POWER Supply
Main power supply(VCC)

3.1

3.3

3.5

V

Backup battery supply

2.0

3.5

V

45

50

55

GPS is not 3D Fixed.

mA

Main power supply Current

35

38

45

GPS is 3D Fixed.

mA

RF POWER Supply

VCC

V
RF Input
Input Impedance

50

Ω
Operating Frequency

1.575

Ghz

DC Electrical characteristics

Parameter

Symbol

Min.

Typ.

Max.

Conditions

Units

VI H

0.7*VCC

3.6

V

VI L

-0.4

0.45

V

VOH

0.75*Vgcc

Vgcc

V

VOL

0.4

V

IOH

2

mA

IOL

2

mA

Vgcc is SiRF Star IV Chip power input, 1.8V Vin.

2012/8/31

5

Receiver Performance

Sensitivity

Tracking :
Autonomous acquisition :

-163dBm

-160 dBm

< 35s
Cold Start – Autonomous
<15s (with CGEE)

< 35s
Warm Start – Autonomous

2

< 15s(with CGEE)

Time-To-First-Fix

1

Hot Start – Autonomous

3

< 1s

Horizontal Position Accuracy

4

Autonomous

< 2.5m

Velocity Accuracy

5

Speed

Heading

< 0.01 m/s

< 0.01 degrees

Reacquisition

0.1 second, average

Update Rate

1 Hz / 5 Hz

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

Environmental Characteristics

Parameter

Min

Typ

Max

Unit

Humidity Range

5 95

% non-condensing

Operation Temperature

-40

85

℃

Storage Temperature

-40

85

℃

2012/8/31

6

Physical Characteristic

Type

19-pin stamp holes

Dimensions

15.2mm * 14 mm * 2.4mm

2012/8/31

7

Application

Application Circuit

GPS Active Antenna Specifications (Recommendation)

Frequency:

1575.42 + 2MHz

Amplifier Gain:

18~22dB Typical
Axial Ratio:

3 dB Typical

Output VSWR:

2.0 Max.
Output Impedance:

50Ω

Noise Figure:

2.0 dB Max
Polarization:

RHCP

Antenna Input Voltage:

3.3V (Typ.)

NOTE:

1. RESET: Low Active, when EB-5318RF is accepted this single, EB-5318RF going to Hibernate
mode. If want EB-5318RF up, need input ON_OFF single.

2. TIMEMARK: One pulse per second output. When EB-5318RF is 3D Fixed, this pin will output
1uS Hi level pulse. If don’t use this, just NC.

3. ECLK: ECLK clock input for frequency aiding applications or as a test clock. If don’t use this,
just NC.

4. GPIO: User can use this I/O pin for special functions. For example, control LED, and can be
used External Interrupts. If don’t use this, just NC.

5. WAKE_UP: EB-5318RF power on, WAKE_UP will output 1.8V.

6. ON_OFF: This pin is controlled EB-5318RF power on. If EB-5318RF want to EB-365 pin to pin
compactable, please ON_OFF connect to WAKE_UP. If don’t use this, just NC.

7. DR I2C interface: The I2C interface supports required sensor instruments such as gyros,
accelerometers, compasses or other sensors that can operate with an I2C bus. If don’t use
this, just NC.

8. VBAT: This is the battery backup power input for the SRAM and RTC when main power is
removed. VBAT is 2V ~ 3.5V.

2012/8/31

8

OPERATING Description

RF_IN

This pin receives signal of GPS analog via
external active antenna. It has to be a
controlled impedance trace at 50ohm. Do not
have RF traces closed the other signal path
and routing it on the top layer. Keep the RF
traces as short as possible.

GND

This is Ground pin for the baseband circuit.

VBAT

This is the battery backup power input for the
SRAM and RTC when main power is off.
Without the external backup battery, EB-365
will always execute a cold star after turning on.
To achieve the faster start-up offered by a hot
or warm start, a battery backup must be
connected. The battery voltage should be
between 2.0V and 3.5V.

NC

EB-5318RF reserves pin, Just NC.

VCC

This is the main power supply to the engine
board. (3.1Vdc to 3.5Vdc)

RESET

Low Active, when EB-5318RF is accepted this
single, EB-5318RF going to Hibernate mode. If
want EB-5318RF up, need input ON_OFF
single.

TIMEPULSE

This pin provides one pulse-per-second output
from the board, which is synchronized to GPS
time. This is not available in Trickle Power
mode

. If do not use it, Just NC.

ON_OFF

The ON_OFF pin commands the EB-5318RF
ON or OFF. There are multiple methods of
connecting this pin for different applications in
order to minimise host resource requirements.
The ON_OFF pin is used to command the
EB-5318RF to turn on or off:
 The turn on command is a hardware

feature of the Power Control FSM based
on sensing a rising edge on the pin.

 The turn off command is a software

feature based on interrupts related to
rising and/or falling edges and/ or sensing

of pin levels. (Not currently supported.)
The ON_OFF pin processing is carried out by
the Power Control FSM. The ON_OFF rising
edge event during low power modes is
recorded in a status register that is
subsequently read by the processor once it is
running. When the processor is running at the
time of an ON_OFF event, the processor can
poll the status or set-up an interrupt.

WAKE_UP

System power controller, when EB-5318RF

Power ON, this pin will output 1.8Vdc.

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 ~ 2.85V.

RXD

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

DR I2C Interface

The I2C host port interface supports: