EB-5662RE

High Performance GPS Engine Board

Product Description

EB-5662RE 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-5662RE is suitable for the following applications:

z Automotive navigation

z Personal positioning

z Fleet management

z Mobile phone navigation

z Marine navigation

Product Features

z SiRF Star IV high performance GPS Chipset

z Very high sensitivity (Tracking Sensitivity: -163 dBm)

z Extremely fast TTFF (Time To First Fix) at low signal level

z Support UART/I2C interface( Default UART)

z Built-in LNA(with in CHIP)

z Compact size (22.4mm x 17mm x 3.0mm) suitable for space-sensitive application

z One size component, easy to mount on another PCB board

z Support NMEA 0183 V3.0 (GGA, GSA, GSV, RMC, VTG, GLL, ZDA)

z Support OSP protocol

z MEMS Support : 3-axis Magnetometer for compass heading for “Point and Tell” feature

z MicroPower Mode(MPM) : Reduce MPM current consumption from <500 uA to < 125 uA

z Support SBAS (WASS, EGNOS, MSAS, GAGAN)

z Active antenna detect

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EB-5662RE

High Performance GPS Engine Board

Product Block Diagram

PIN Number(s)

Name

Type

Description

Note

DR_I2C_DIO

I/O

DR I2C Interface.

DR_I2C_CLK

I/O

Support MEMS Sensor , 1.8V Level

This is the main transmits channel for

outputting navigation and measurement data

TXD

to user’s navigation software or user written

software. Output TTL level, 0V ~ 2.85V.

This is the main receive channel for receiving

software commands to the engine board from

RXD

SiRFdemo software or from user written

software.

5,6

VCC

Main power supply to the engine board.

7,13,14,15,17

GND

Ground.

VDD3V3OUT

Output voltage 3.3V

9,12,21,22,23,

RESET

System reset (active low)

VBAT

Backup battery supply voltage

RF IN

GPS antenna input

VCC_RF

Supply Antenna Bias voltage (V=VCC)

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EB-5662RE

High Performance GPS Engine Board

V_ANT

Antenna Bias voltage

V-ANT_DET

This pin is Active Antenna detect signal input

ON_OFF pin is used to command the

ON_OFF

EB-5662RE to turn on or off

WAKE_UP

System power on, 1.8V output .

EXTINT

External Interrupt

TIMEPULSE

One pulse per second output.(1PPS)

<Note>

1. GPIO is 1.8V Level

2. The ON_OFF pin commands the EB-5662RE 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-5662RE used to enable an external PMIC. A low

on this output indicates that the EB-5662RE 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-5662RE 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-5662RE.

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

Backup battery supply

2.0

3.5

Main power supply Current

GPS is not 3D Fixed.

Backup battery supply Current

GPS is 3D Fixed.

RF POWER Supply

VCC

RF Input

Input Impedance

Ω

Operating Frequency

1.575

Ghz

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EB-5662RE

High Performance GPS Engine Board

DC Electrical characteristics

Parameter

Symbol

Min.

Typ.

Max.

Conditions

Units

High Level Input Voltage

VI H

0.7*VCC

3.6

Low Level Input Voltage

VI L

-0.4

0.45

High Level Output Voltage

VOH

0.75*Vgcc

Vgcc

Low Level Output Voltage

VOL

0.4

High Level Output Current

IOH

Low Level Output Current

IOL

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

Receiver Performance

Tracking :

-163dBm

Sensitivity

Autonomous acquisition :

-160 dBm

< 35s

Cold Start - Autonomous

<15s (with CGEE)

Time-To-First-Fix¹

< 35s

Warm Start - Autonomous²

< 15s(with CGEE)

Hot Start - Autonomous³

< 1s

Horizontal Position Accuracy⁴

Autonomous

< 2.5m

Speed

< 0.01 m/s

Velocity Accuracy⁵

Heading

< 0.01 degrees

Reacquisition

0.1 second, average

1 Hz / 5 Hz

Update Rate

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

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EB-5662RE

High Performance GPS Engine Board

Application

Application Circuit without ANTENNA Detect Function

GPS_ANTENNA

EB-5662RE

GND

CHOKE RF

50ohm LINE

RF_IN

GND

CAP NP

VCC_RF

VBAT

GPS_3V3

CAP NP

V_ANT

RESET

A_DET_ANT

VDD_3V3

3V3_OUT

GND

GPS_3V3

VDD

ON_OFF

RXD

WAKE_UP

TXD

TXA

EIT

DR_I2C_CLK

I2C_CLK

1PPS OUTPUT

TIMEPLUSE

DR_I2C_DIO

I2C_DIO

R12

R11

R10

C10

C11

10UF

10K

2K2/NC2K2/NC

GPS_3V3

1V8

Application Circuit with EXT Antenna Detect Function

GPS_ANTENNA

EB-5662RE

GND

CHOKE RF

50ohm LINE

RF_IN

GND

CAP NP VCC_RF

VCC_RF

VBAT

GPS_3V3

CAP NP

V_ANT

RESET

ANT_DET

A_DET_ANT

R13

10R_F

VDD_3V3

3V3_OUT

VCC_RF

V_ANT

GND

VDD

GPS_3V3

2N3906

VDD

ON_OFF

RXD

ANT_DET

WAKE_UP

TXD

TXA

EIT

DR_I2C_CLK

I2C_CLK

R14

R15

1PPS OUTPUT

TIMEPLUSE

DR_I2C_DIO

I2C_DIO

47K

200K

R12

R11

R10

C10

C11

10UF

10K

2K2/NC2K2/NC

GPS_3V3

1V8

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EB-5662RE

High Performance GPS Engine Board

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:

2.85V (Typ.)

NOTE:

1. RESET: Low Active, when EB-5662RE is accepted this single, EB-5662RE going to Hibernate

mode. If want EB-5662RE up, need input ON_OFF single.

2. TIMEPLUSE: One pulse per second output. When EB-5662RE is 3D Fixed, this pin will output

1uS Hi level pulse. If don’t use this, just NC.

3. WAKE_UP: EB-5662RE power on, WAKE_UP will output 1.8V.

4. ON_OFF: This pin is controlled EB-5662RE power on. If EB-5662RE want to EB-662 pin to pin

compactable, please ON_OFF connect to WAKE_UP. If don’t use this, just NC.

5. 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.

6. VBAT: This is the battery backup power input for the SRAM and RTC when main power is

removed. VBAT is 2V ~ 3.5V.

7. EB-5662RE RF is has 3.3V external POWER to active ANTENNA use.

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EB-5662RE

High Performance GPS Engine Board

OPERATING Description

VCC

RF_IN

This is the main power supply to the engine

This pin receives signal of GPS analog via

board. (3.1Vdc to 3.5Vdc)

external active antenna. It has to be a

controlled impedance trace at 50ohm. Do not

GND

have RF traces closed the other signal path

This is Ground pin for the baseband circuit.

and routing it on the top layer. Keep the RF

traces as short as possible.

RXD

This is the main channel for receiving

VBAT

software commands from SiRFdemo

This is the battery backup power input for the

software or from your proprietary software.

SRAM and RTC when main power is off.

Without the external backup battery,

TXD

EB-5662RE will always execute a cold star

This is the main transmits channel for

after turning on. To achieve the faster

outputting navigation and measurement data

start-up offered by a hot or warm start, a

to user’s navigation software or user written

battery backup must be connected. The

software. Output is TTL level, 0V ~ 2.85V.

battery voltage should be between 2.0V and

3.5V.

DR I2C Interface

The I2C host port interface supports:

VDD3V3OUT

Operation up to 400kbps

This PIN is output voltage 3.3V. If do not use

Individual transmit and receive FIFO lengths of

it, Just NC.

64B

■ The default I2C address values are:

ON_OFF

Rx: 0x60

The ON_OFF pin commands the EB-5662RE

Tx: 0x62

ON or OFF. There are multiple methods of

Multi-master I2C mode is supported by default.

connecting this pin for different applications

Dead reckoning applications support the DR

in order to minimise host resource

I2C interface. The I2C interface supports

requirements.

required sensor instruments such as gyros,

The ON_OFF pin is used to command the

accelerometers, compasses or other sensors

EB-5662RE to turn on or off:

that can operate with an I2C bus.

z The turn on command is a hardware

feature of the Power Control FSM based

DRI2C interface supports:

on sensing a rising edge on the pin.

Typical data lengths (command + in/data out)

z The turn off command is a software

of several bytes

feature based on interrupts related to

Standard I2C bus maximum data rate 400kbps

rising and/or falling edges and/ or

Minimum data rate 100kbps

sensing of pin levels. (Not currently

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EB-5662RE

High Performance GPS Engine Board

supported.)

If you use Active Antenna, you can connect

The ON_OFF pin processing is carried out by

this pin to VCC_RF or connect other POWER

the Power Control FSM. The ON_OFF rising

(Vin = 2.8V ~ 5V). If you will be use Passive

edge event during low power modes is

Antenna, Just NC.

recorded in a status register that is

subsequently read by the processor once it is

V-ANT_DET

running. When the processor is running at

This pin is Active Antenna detect signal input,

the time of an ON_OFF event, the processor

when this pin is accept low level, EB-5662RE

can poll the status or set-up an interrupt.

will be output MNEA command:

$GPANT,ANTSTAUS=OK*16<CR><LF>

WAKE_UP

OR do not receive signal, to be output MNEA

command:

System power controller, when EB-5662RE

$GPANT,ANTSTAUTS=OPEN*06<CR><LF>

Power ON, this pin will output 1.8V_dc.

If Active Antenna is damage ,and short to

gnd. EB-5662RE will to be output MNEA

command:

EB-5662RE reserves pin, Just NC.

$GPTXT,01,01,02,ANTSTATUS=SHORT*6D

VCC_RF

EXTINT0

VCC_RF can supply Active Antenna Bias

This PIN is External Interrupt, If do not use it,

voltage. This pin will supply Active Antenna

Just NC.

power. If do not use it, Just NC.

TIMEPLUSE

RESET

This pin provides one pulse-per-second

This pin is input low active. This Module has

output from the board, which is synchronized

internal Power on Reset circuit.

to GPS time. This is not available in Trickle

Power mode. If do not use it, Just NC.

V_ANT

V_ANT is Active Antenna Bias voltage input.

EB-5662RE

High Performance GPS Engine Board

SOFTWARE COMMAND

NMEA Output Command

GGA - Global Positioning System Fixed Data

Note - Fields marked in italic red apply only to NMEA version 2.3 (and later) in this NMEA

message description

Table B-2 contains the values for the following example:

$GPGGA,161229.487,3723.2475,N,12158.3416,W,1,07,1.0,9.0,M,-34.2,M,,0000*18

Table B-2 GGA Data Format

Name

Example

Units

Description

Message ID

$GPGGA

GGA protocol header

UTC Time

161229.487

hhmmss.sss

Latitude

3723.2475

ddmm.mmmm

N/S Indicator

N=north or S=south

Longitude

12158.3416

dddmm.mmmm

E/W Indicator

E=east or W=west

Position Fix Indicator

See Table B-3

Satellites Used

Range 0 to 12

HDOP

1.0

Horizontal Dilution of Precision

MSL Altitude

9.0

meters

Units

meters

Geoid Separation¹

-34.2

meters

Geoid-to-ellipsoid separation.

Ellipsoid altitude=MSL Altitude + Geoid

Separation

Units

meters

Age of Diff. Corr.

second

Null fields when DGPS is not used

Diff. Ref. Station ID

0000

Checksum

*18

End of message termination

Table B-3 Position Fix Indicator

Value

Description

Fix not available or invalid

GPS SPS Mode, fix valid

Differential GPS, SPS Mode , fix valid

Not supported

Dead Reckoning Mode, fix valid

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EB-5662RE

High Performance GPS Engine Board

Note:

A valid status is derived from all the parameters set in the software. This includes the minimum

number of satellites required, any DOP mask setting, presence of DGPS corrections, etc. If the

default or current software setting requires that a factor is met, then if that factor is not met the

solution will be marked as invalid.

GLL - Geographic Position-Latitude/Longitude

Note - Fields marked in italic red apply only to NMEA version 2.3 (and later) in this NMEA

message description

Table B-4 contains the values for the following example:

$GPGLL,3723.2475,N,12158.3416,W,161229.487,A,A*41

Table B-4 GLL Data Format

Name

Example

Units

Description

Message ID

$GPGLL

GLL protocol header

Latitude

3723.2475

ddmm.mmmm

N/S Indicator

N=north or S=south

Longitude

12158.3416

dddmm.mmmm

E/W Indicator

E=east or W=west

UTC Position

161229.487

hhmmss.sss

Status

A=data valid or V=data not valid

Mode

A=Autonomous, D=DGPS,

E=DR

N=Output Data Not Valid

R= Coarse Position¹

S=Simulator

Checksum

*41

End of message termination

1. Position was calculated based on one or more of the SVs having their states derived from

almanac parameters, as opposed to ephemerides.

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EB-5662RE

High Performance GPS Engine Board

GSA - GNSS DOP and Active Satellites

Table B-5 contains the values for the following example:

$GPGSA,A,3,07,02,26,27,09,04,15,,,,,,1.8,1.0,1.5*33

Table B-5 GSA Data Format

Name

Example

Units

Description

Message ID

$GPGSA

GSA protocol header

Mode 1

See Table B-6

Mode 2

See Table B-7

Satellite Used¹

Sv on Channel 1

Satellite Used¹

Sv on Channel 2

…..

Satellite Used¹

Sv on Channel 12

PDOP²

1.8

Position dilution of Precision

HDOP²

1.0

Horizontal dilution of Precision

VDOP²

1.5

Vertical dilution of Precision

Checksum

*33

End of message termination

1. Satellite used in solution.

2. Maximum DOP value reported is 50. When 50 is reported, the actual DOP may be much larger.

Table B-6 Mode1

Value

Description

Manual-forced to operate in 2D or 3D mode

2Dautomatic-allowed to automatically switch 2

Table B-7 Mode 2

Value

Description

Fix Not Available

2D (<4 SVs used)

3D (>3 SVs used)

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EB-5662RE

High Performance GPS Engine Board

GSV - GNSS Satellites in View

Table B-8 contains the values for the following example:

$GPGSV,2,1,07,07,79,048,42,02,51,062,43,26,36,256,42,27,27,138,42*71

$GPGSV,2,2,07,09,23,313,42,04,19,159,41,15,12,041,42*41

Table B-8 GSV Data Format

Name

Example

Units

Description

Message ID

$GPGSV

GSV protocol header

Number of Messages¹

Range 1 to 3

Message Number¹

Range 1 to 3

Satellites in View¹

Satellite ID

Channel 1(Range 1 to 32)

Elevation

degrees

Channel 1(Maximum90)

Azimuth

048

degrees

Channel 1(True, Range 0 to 359)

SNR(C/No)

dBHz

Range 0 to 99,null when not tracking

…….

Satellite ID

Channel 4 (Range 1 to 32)

Elevation

Degrees

Channel 4(Maximum90)

Azimuth

138

Degrees

Channel 4(True, Range 0 to 359)

SNR(C/No)

dBHz

Range 0 to 99,null when not tracking

Checksum

*71

End of message termination

1. Depending on the number of satellites tracked, multiple messages of GSV data may be

required. In some software versions, the maximum number of satellites reported as visible is

limited to 12, even though more may be visible.

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EB-5662RE

High Performance GPS Engine Board

RMC - Recommended Minimum Specific GNSS Data

Note - Fields marked in italic red apply only to NMEA version 2.3 (and later) in this NMEA

message description

Table B-9 contains the values for the following example:

$GPRMC,161229.487,A,3723.2475,N,12158.3416,W,0.13,309.62,120598,,,A*10

Table B-9 RMC Data Format

Name

Example

Units

Description

Message ID

$GPRMC

RMC protocol header

UTC Time

161229.487

hhmmss.sss

Status¹

A=data valid or V=data not valid

Latitude

3723.2475

ddmm.mmmm

N/S Indicator

N=north or S=south

Longitude

12158.3416

dddmm.mmmm

E/W Indicator

E=east or W=west

Speed Over Ground

0.13

knots

Course Over Ground

309.62

degrees

True

Date

120598

ddmmyy

Magnetic Variation²

degrees

E=east or W=west

East/West Indicator²

E=east

Mode

A=Autonomous, D=DGPS,

E=DR

N=Output Data Not Valid

R= Coarse Position³

S=Simulator

Checksum

*10

End of message termination

1. A valid status is derived from all the parameters set in the software. This

includes

the

minimum number of satellites required, any DOP mask setting, presence of DGPS

corrections, etc. If the default or current software setting requires that a factor is met, then if

that factor is not met the solution will be marked as invalid.

2. SiRF Technology Inc. does not support magnetic declination. All “course over ground” data

are geodetic WGS84 directions relative to true North.

3. Position was calculated based on one or more of the SVs having their states derived from

almanac parameters, as opposed to ephemerides.

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EB-5662RE

High Performance GPS Engine Board

VTG - Course Over Ground and Ground Speed

Note - Fields marked in italic red apply only to NMEA version 2.3 (and later) in this NMEA

message description

Table B-10 contains the values for the following example:

$GPVTG,309.62,T,,M,0.13,N,0.2,K,A*23

Table B-10 VTG Data Format

Name

Example

Units

Description

Message ID

$GPVTG

VTG protocol header

Course

309.62

degrees

Measured heading

Reference

True

Course

degrees

Measured heading

Reference

Magnetic¹

Speed

0.13

knots

Measured horizontal speed

Units

Knots

Speed

0.2

Km/hr

Measured horizontal speed

Units

Kilometers per hour

Mode

A=Autonomous, D=DGPS,

E=DR

N=Output Data Not Valid

R= Coarse Position²

S=Simulator

Checksum

*23

End of message termination

1. SiRF Technology Inc. does not support magnetic declination. All “course over ground” data

are geodetic WGS84 directions.

2. Position was calculated based on one or more of the SVs having their states derived from

almanac parameters, as opposed to ephemerides.

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EB-5662RE

High Performance GPS Engine Board

ZDA - Time and Date

This message is included only with systems which support a time-mark output pulse identified as

"1PPS". Outputs the time associated with the current 1PPS pulse. Each message is output within

a few hundred ms after the 1PPS pulse is output and tells the time of the pulse that just occurred.

Table B-11 contains the values for the following example:

$GPZDA,181813,14,10,2003,,*4F<CR><LF>

Table B-11: ZDA Data Format

Name

Example

Unit

Description

Message ID

$GPZDA

ZDA protocol header

The UTC time units are:

hh=UTC hours from 00 to 23 mm=UTC minutes

from 00 to 59 ss=UTC seconds from 00 to 59 Either

using valid IONO/UTC or estimated from default

UTC Time

181813

hhmmss

leap seconds

Day

Day of the month, range 1 to 31

Month

Month of the year, range 1 to 12

Year

2003

Year

Local zone hour¹

hour

Offset from UTC (set to 00)

Local zone minutes¹

minute

Offset from UTC (set to 00)

Checksum

*4F

End of message termination

1. Not supported by CSR, reported as 00.

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EB-5662RE

High Performance GPS Engine Board

NMEA Input Command

A). Set Serial Port ID: 100 Set PORTA parameters and protocol

This command message is used to set the protocol (SiRF Binary, NMEA, or USER1) and/or the

communication parameters (baud, data bits, stop bits, parity). Generally, this command would be

used to switch the module back to SiRF Binary protocol mode where a more extensive command

message set is available. For example, to change navigation parameters. When a valid message

is received, the parameters will be stored in battery backed SRAM and then the receiver will

restart using the saved parameters.

Format:

$PSRF100,<protocol>,<baud>,<DataBits>,<StopBits>,<Parity>*CKSUM<CR><LF>

0=SiRF Binary, 1=NMEA, 4=USER1

<baud>

1200, 2400, 4800, 9600, 19200, 38400

8,7. Note that SiRF protocol is only valid f8 Data bits

0,1

0=None, 1=Odd, 2=Even

Example 1: Switch to SiRF Binary protocol at 9600,8,N,1

$PSRF100,0,9600,8,1,0*0C<CR><LF>

Example 2: Switch to User1 protocol at 38400,8,N,1

$PSRF100,4,38400,8,1,0*38<CR><LF>

**Checksum Field: The absolute value calculated by exclusive-OR the 8 data bits of each

character in the Sentence, between, but excluding “$” and “*”. The hexadecimal value of the most

significant and least significant 4 bits of the result are convertted to two ASCII characters (0-9, A-F)

for transmission. The most significant character is transmitted first.

**<CR><LF>

: Hex 0D 0A

B). Navigation lnitialization ID：101 Parameters required for start

This command is used to initialize the module for a warm start, by providing current position （in X,

Y, Z coordinates）,clock offset, and time. This enables the receiver to search for the correct

satellite signals at the correct signal parameters. Correct initialization parameters will enable the

receiver to acquire signals more quickly, and thus, produce a faster navigational solution.

When a valid Navigation Initialization command is received, the receiver will restart using the input

parameters as a basis for satellite selection and acquisition.

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EB-5662RE

High Performance GPS Engine Board

Format：

$PSRF101,<X>,<Y>,<Z>,<ClkOffset>,<TimeOfWeek>,<WeekNo>,<chnlCount>,<ResetCfg>*CK

SUM<CR><LF>

<X>

X coordinate position

INT32

<Y>

Y coordinate position

INT32

<Z>

Z coordinate position

INT32

Clock offset of the receiver in Hz, Use 0 for last saved value if available. If

this is unavailable, a default value of 75000 for GSP1, 95000 for GSP 1/LX

will be used.

INT32

GPS Time Of Week

UINT32

GPS Week Number

UINT16

（ Week No and Time Of Week calculation from UTC time）

Number of channels to use.1-12. If your CPU throughput is not high enough,

you could decrease needed throughput by reducing the number of active

channels

UBYTE

bit mask

0×01=Data Valid warm/hot start=1

0×02=clear ephemeris warm start=1

0×04=clear memory. Cold start=1

UBYTE

Example: Start using known position and time.

＄PSRF101,-2686700,-4304200,3851624,96000,497260,921,12,3*7F

C). Set DGPS Port ID: 102 Set PORT B parameters for DGPS input

This command is used to control Serial Port B that is an input only serial port used to receive

RTCM differential corrections.

Differential receivers may output corrections using different communication parameters.

The default communication parameters for PORT B are 9600Baud, 8data bits, 0 stop bits, and no

parity. If a DGPS receiver is used which has different communication parameters, use this

command to allow the receiver to correctly decode the data. When a valid message is received,

the parameters will be stored in battery backed SRAM and then the receiver will restart using the

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EB-5662RE

High Performance GPS Engine Board

saved parameters.

Format:

＄PSRF102,<Baud>,<DataBits>,<StopBits>,<Parity>*CKSUM<CR><LF>

<baud>

1200,2400,4800,9600,19200,38400

0,1

0=None, Odd=1,Even=2

Example: Set DGPS Port to be 9600,8,N,1

＄PSRF102,9600,8,1.0*12

D). Query/Rate Control ID: 103 Query standard NMEA message and/or set output rate

This command is used to control the output of standard NMEA message GGA, GLL, GSA, GSV,

RMC, VTG. Using this command message, standard NMEA message may be polled once, or

setup for periodic output. Checksums may also be enabled or disabled depending on the needs of

the receiving program. NMEA message settings are saved in battery backed memory for each

entry when the message is accepted.

Format:

＄PSRF103,<msg>,<mode>,<rate>,<cksumEnable>*CKSUM<CR><LF>

<msg>

0=GGA,

1=GLL,

2=GSA,

3=GSV,

4=RMC,

5=VTG

6=MSS(if internal beacon is supported)

7=Not defined

8=ZDA(if 1PPS output supported)

9=Not defined

<mode>

0=SetRate

1=Query

2=ABP On

3=ABP Off

<rate>

Output every <rate>seconds, off=0,max=255

0=disable Checksum,1=Enable checksum for specified message

Example 1: Query the GGA message with checksum enabled

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EB-5662RE

High Performance GPS Engine Board

＄PSRF103,00,01,00,01*25

Example 2: Enable VTG message for a 1Hz constant output with checksum enabled

＄PSRF103,05,00,01,01*20

Example 3: Disable VTG message

＄PSRF103,05,00,00,01*21

E). LLA Navigation lnitialization ID: 104 Parameters required to start using Lat/Lon/Alt

This command is used to initialize the module for a warm start, by providing current position (in

Latitude, Longitude, Altitude coordinates), clock offset, and time. This enables the receiver to

search for the correct satellite signals at the correct signal parameters. Correct initialization

parameters will enable the receiver to acquire signals more quickly, and thus, will produce a faster

navigational soution.

When a valid LLA Navigation Initialization command is received, the receiver will restart using the

input parameters as a basis for satellite selection and acquisition.

Format:

＄PSRF104,<Lat>,<Lon>,<Alt>,<ClkOffset>,<TimeOfWeek>,<WeekNo>,<ChannelCount>,

<ResetCfg>*CKSUM<CR><LF>

<Lat>

Latitude position, assumed positive north of equator and negative south of

equator float, possibly signed

<Lon>

Longitude position, it is assumed positive east of Greenwich and negative

west of Greenwich Float, possibly signed

<Alt>

Altitude position float, possibly signed

Clock Offset of the receiver in Hz, use 0 for last saved value if available. If

this is unavailable, a default value of 75000 for GSP1, 95000 for GSP1/LX

will be used.

INT32

GPS Time Of Week

UINT32

GPS Week Number

UINT16

Number of channels to use. 1-12 UBYTE

bit mask

0×01=Data Valid warm/hot starts=1

0×02=clear ephemeris warm start=1

0×04=clear memory. Cold start=1

UBYTE

Example: Start using known position and time.

＄PSRF104,37.3875111,-121.97232,0,96000,237759,922,12,3*37

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EB-5662RE

High Performance GPS Engine Board

F). Development Data On/Off ID: 105 Switch Development Data Messages On/Off

Use this command to enable development debug information if you are having trouble getting

commands accepted. Invalid commands will generate debug information that should enable the

user to determine the source of the command rejection. Common reasons for input command

rejection are invalid checksum or parameter out of specified range. This setting is not preserved

across a module reset.

Format:

＄PSRF105,<debug>*CKSUM<CR><LF>

<debug>

0=Off, 1=On

Example: Debug On

＄PSRF105,1*3E

Example: Debug Off

＄PSRF105,0*3F

G). Select Datum ID: 106 Selection of datum to be used for coordinate Transformations

GPS receivers perform initial position and velocity calculations using an earth-centered earth-fixed

(ECEF) coordinate system. Results may be converted to an earth model (geoid) defined by the

selected datum. The default datum is WGS 84 (World Geodetic System 1984) which provides a

worldwide common grid system that may be translated into local coordinate systems or map

datums. (Local map datums are a best fit to the local shape of the earth and not valid worldwide.)

Examples:

Datum select TOKYO_MEAN

$PSRF106,178*32

Name

Example

Unit

Description

Message ID

$PSRF106

PSRF106 protocol

header

Datum

178

21=WGS84

178=TOKYO_MEAN

179=TOKYO_JAPAN

180=TOKYO_KOREA

181=TOKYO_OKINAWA

Debug

Checksum

*32

End of message

termination

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EB-5662RE

High Performance GPS Engine Board

PCB Layout Recommend

Recommended Layout PAD

Unit: mm

Tolerance: 0.1mm

PCB Layout Recommendations

Do not routing the other signal or power trace under the engine board.

RF:

This pin receives signal of GPS analog via external active antenna .It has to be a controlled

impedance trace at 50ohm.

Do not place the RF traces close to the other signal path and not routing it on the top layer.

Keep the RF traces as short as possible.

Antenna:

Keep the active antenna on the top of your system and confirm the antenna radiation pattern、

axial ratio、power gain、noise figure、VSWR are correct when you Setup the antenna in your case.

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