Navman Jupiter 31 User manual

Related documents

• Jupiter 31 Product Brief, LA010810

• Jupiter 31 Data Sheet, LA010811

• SiRF NMEA Protocol reference manual

• SiRF Binary Protocol reference manual

Jupiter 31

GPS receiver module

Comparison between

Jupiter 21/J21S & Jupiter 31

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Contents

1.0 Introduction ....................................................................................................... 5

2.0 Technical description ....................................................................................... 5

3.0 Product applications ........................................................................................ 5

4.0 Hardware comparison ...................................................................................... 5

4.1 Primary power .............................................................................................................. 5

4.2 Antenna gain ................................................................................................................ 6

4.3 Pinout functions............................................................................................................ 6

4.4 J31 Pin assignments .................................................................................................... 6

5.0 Data communications....................................................................................... 7

5.1 Serial communications ................................................................................................. 7

5.2 Default baud rate and port assignments ...................................................................... 7

6.0 Software............................................................................................................. 7

6.1 Software functionality ................................................................................................... 7

6.1.1 Navigation settings................................................................................................ 7

6.1.2 1PPS pulse width.................................................................................................. 7

6.2 NMEA output messages .............................................................................................. 8

6.2.1 Default NMEA output messages .......................................................................... 8

6.2.2 NMEA message format........................................................................................ 8

6.2.3 ZDA message ...................................................................................................... 8

6.2.4 VTG message ...................................................................................................... 9

6.2.5 RMC message ..................................................................................................... 9

6.2.6 GSA message...................................................................................................... 9

6.2.7 GGA message.....................................................................................................10

6.3 NMEA input messages................................................................................................10

6.4 SiRF binary protocol....................................................................................................12

6.4.1 Binary output messages......................................................................................12

6.4.2 Binary input messages........................................................................................12

7.0 Support............................................................................................................. 14

7.1 Sales support...............................................................................................................14

7.2 Technical support ........................................................................................................14

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Figures

Figure 6-1: Jupiter 31 NMEA message structure ............................................................... 8

Figure 6-2: Jupiter 31 NMEA message structure..............................................................11

Figure 6-3: Jupiter 21 NMEA message structure..............................................................11

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Tables

Table 4-1: Hardware comparison ....................................................................................... 5

Table 4-2: Primary power comparison ............................................................................... 5

Table 4-3: Antenna gain comparison ................................................................................. 6

Table 4-4: Pinout function comparison............................................................................... 6

Table 4-5: J1 connector pin functions ................................................................................ 6

Table 5-1: Default baud rate and port assignment comparison.......................................... 7

Table 6-1: Software functionality comparison ................................................................... 7

Table 6-2: NMEA output message comparison ................................................................. 8

Table 6-3: NMEA message structure comparison ............................................................. 8

Table 6-4: ZDA message comparison................................................................................ 8

Table 6-5: VTG message comparison ............................................................................... 9

Table 6-6: RMC message comparison .............................................................................. 9

Table 6-7: GSA message comparison................................................................................ 9

Table 6-8: GGA message comparison..............................................................................10

Table 6-9: NMEA input message comparison ..................................................................10

Table 6-10: SiRF Binary output messages........................................................................12

Table 6-11: SiRF Binary input messages ..........................................................................13

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1.0 Introduction

This application document describes the most signicant differences between Navman Jupiter

31 GPS module and the Jupiter 21 GPS module.

This document is an aid for migrating from Jupiter 21 to Jupiter 31. While every effort has been

made to identify differences, it is incumbent on all customers to qualify the Jupiter 31 in each

application.

2.0 Technical description

Jupiter 21 and 21S are based on SiRF GSC2e LP GPS core architecture. Jupiter 31 is based

on SiRF GSC3 LP core architecture. J31 consists of a carrier board and a Jupiter 30 module

mounted with associated connectors and power circuitry for maximum backward compatibility

with Jupiter 21 series products.

3.0 Product applications

Jupiter 21:

TU21-D450-021

TU21-D450-031

TU21-D450-041

TU21-D550-021

TU21-D550-031

TU21-D550-041

Jupiter 31:

AA003041-G

AA003042-G

AA003043-G

4.0 Hardware comparison

Feature Jupiter 21 Jupiter 31 Performance differences

receiver design SiRFStarIIe/LP

chipset

SiRFStarIII

GSC3e/LP chipset

1) J31 has faster TTFF

2) J31 has lower power

consumption

3) J31 has greater receiver

sensitivity

Table 4-1: Hardware comparison

4.1 Primary power

Parameter J21 J21S J31

Input voltage 3.1 to 5.5 VDC 3.1 to 5.5 VDC 3.3 VDC

- 0.1/ + 0.3 VDC*

Current at full power (typical) 75 mA 85 mA <41 mA

Current ( max) 100 mA 110 mA < 45 mA

Battery backup voltage 2.5 to 5.5 VDC 2.5 to 5.5 VDC 1.9 to 3.6 VDC **

Battery backup current 10 µA 10 µA 5 to 6 µA

Ripple 50 mV pp 50 mV pp 50 mV pp

Low voltage detector system reset < 2.85 V < 2.85 V < 3.0 V

*5VDC input requires addition of a regulator to existing board layout; ** battery backup voltage must not fall below

1.4 v

Table 4-2: Primary power comparison

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4.2 Antenna gain

Feature Jupiter 21 Jupiter 31

antenna gain

active antenna gain

should be in the range

of 20 to 30 dB

best results achieved

with an active antenna

gain of 16 dB at the

module input

Table 4-3: Antenna gain comparison

4.3 Pinout functions

All pin functions are the same with the exception of DGPS on Pin 15 and the Pin 20 functional

difference:

Pin Jupiter 21 name Jupiter 31 name Performance issues

15 RXB RXB

J21: second serial data input port. J21/J21D only

receives DGPS messages in RTCM (J21S does

not support DGPS)

J31: does not support DGPS messages

20 GPSFIX

(active low) WAKEUP

J21: outputs low when the receiver has a x, high

otherwise

J31: Push-to-x wakeup on positive going edge.

Table 4-4: Pinout function comparison

4.4 J31 Pin assignments

J1 Name Type Description

1 VANT P external power supply for active antenna

2PWRIN Pprimary VDC power input

3 VBATT Pbackup battery input

4PWRIN Pprimary VDC power input

5RESET I master reset (active low)

6GPIO 14 I/O reserved - no connect

7GPIO 15 I/O reserved - no connect

8BOOT I serial boot (active low; can be held high or open circuit for

normal operation)

9GPIO 1 I/O reserved - no connect

10 GND Pground

11 TXA O CMOS level asynchronous output for UART A

12 RXA I CMOS level asynchronous input for UART A

13 GND Pground

14 TXB O CMOS level asynchronous output for UART B

15 RXB I CMOS level asynchronous input for UART B

16 GND Pground

17 GND Pground

18 GND Pground

19 PPS O pulse per second output 1uS wide

20 WAKE-UP I PTF wake-up, active on positive-going edge

Table 4-5: J1 connector pin functions

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5.0 Data communications

5.1 Serial communications

The host serial I/O of the receiver serial data interface supports full duplex communications

between the receiver and the user. The default serial modes are shown below:

5.2 Default baud rate and port assignments

Port J21 (GSW2) J21S (GSW2) J31 (GSW3)

Port A NMEA, 4800 NMEA, 4800 NMEA, 4800

Port B DGPS, 9600 SiRF Binary, 38400 SiRF binary, 38 400*

While these are the default baud rates, they can be changed using the “write-to-ash” feature. Refer to the

Application note for WTF.

Table 5-1: Default baud rate and port assignment comparison

6.0 Software

6.1 Software functionality

Feature Description J20/20S J31

DGPS Accepts DGPS corrections in the RTCM SC-104

format Yes No

PPS time

message

PPS binary output message, MID52 (0 x 34) Yes No *

SBAS

message

SBAS operating parameters binary output

message, MID50 (0x32) Yes No †

User GPIO Proprietary NMEA messaging control User GPIO Yes No

GPS Fix GPS x indication, active low, Pin 20 Yes No

Wake Up Push to Fix Power management wake up on

positive going edge, Pin 20 No Yes

* Planned implementation for later version of code; † See alternate MID 170

Table 6-1: Software functionality comparison

NOTE: Reset Push to Fix mode function not compatible. Wake up line PIN20 must be used for

PTF MODE on J31.

6.1.1 Navigation settings

The J31 with its default navigation settings will outperform the J21/21S units with their default

navigation settings. Therefore any input messages issued to J21 units for Navigation settings

should be initially disabled until the performance is compared.

The J31 supports Cong to Flash and User Proles for advanced functionality not supported on

the J21/21S. These settings can be set in production or by the user rmware.

6.1.2 1PPS pulse width

The 1PPS is far more accurate in the J31 but the pulse width is narrower at 1uS.

Note: The Binary 1PPS message Message ID 52 is not currently supported by the J31.

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6.2 NMEA output messages

NMEA (National Marine Electronics Association) communications protocol is used for most

navigation devices as the common standard interface protocol to transmit data. The messages

below adhere to NMEA 0183 v.2.2 protocol. Please refer to SiRF NMEA Protocol Reference

Manual for a detailed description.

6.2.1 Default NMEA output messages

Message description Message ID J21 J21S J31

GPS x data GPGGA 1 s 1 s 1 s

GPS DOP and active satellites GPGSA 1 s 1 s 1 s

GPS satellites in view GPGSV 2 s 1 s 1 s

Recommended minimum specic GPS data GPRMC 1 s 1 s 1 s

Track made good and ground speed GPVTG Off Off 1 s

Latitude, longitude, UTC of position x and

status GPGLL Off Off 1 s

PPS timing message GPZDA Off n/a Off

Navman proprietary Zodiac channel status PRWIZCH 1 s 1 s n/a

Off=not enabled by default; n/a=not available

Table 6-2: NMEA output message comparison

6.2.2 NMEA message format

Message

name J31 NMEA structure J21 NMEA structure

(identical to J12)

GGA $GPGGA,161229.487,3723.2475,N,12158.3

416,W,1,07,1.0,9.0,M,1.0,M,0.0,0000*18

$GPGGA,161229,3723.2475,N,12158.3416

,W,1,07,1.00,9.0,M,1.0,M, , *18

GSA $GPGSA,A,3,07,02,26,27,09,04,15, , , , ,

,1.8,1.0,1.5*33

$GPGSA,A,3,07,02,26,27,09,04,15, , , , ,

,1.80,1.00,1.50*33

RMC $GPRMC,161229.487,A,3723.2475,N,1215

8.3416,W,0.130,309.62,120598,23.1,E*10

$GPRMC,161229,A,3723.2475,N,12158.34

16,W,0.130,309.6,120598,23.1,E*10

VTG $GPVTG,309.62,T,286.52,M,0.13,N,0.20,

K,A*23

$GPVTG,309.6,T,286.5,M,0.130,N,0.200,

K,A*23

ZDA $GPZDA,181813,14,10,2003,00,00*4F $GPZDA,181813.00,14,10,2003,00,00*4F

Table 6-3: NMEA message structure comparison

The J31 supports the NMEA 0183 v2.2, structure detailed in SiRF NMEA Protocol Reference

Manual:

$GPZDA,133138.000,03,09,2007,,*52

$GPGGA,133138.000,5133.2768,N,00150.4530,W,1,05,2.5,102.7,M,48.1,M,,0000*47

$GPGLL,5133.2768,N,00150.4530,W,133138.000,A*24

$GPGSA,A,3,05,30,12,09,14,,,,,,,,5.1,2.5,4.4*38

$GPGSV,3,1,12,12,89,106,43,05,67,247,43,09,53,116,37,30,48,245,45*78

$GPGSV,3,2,12,14,44,296,37,17,19,041,,04,11,073,,22,10,256,22*7C

$GPGSV,3,3,12,31,09,293,,06,07,193,,01,02,327,,18,00,228,*77

$GPRMC,133138.000,A,5133.2768,N,00150.4530,W,0.05,26.96,030907,,*20

$GPVTG,26.96,T,,M,0.05,N,0.1,K*5F

Figure 6-1: Jupiter 31 NMEA message structure

6.2.3 ZDA message

J31 J21

ZDA $GPZDA,181813,14,10,2003,00,00*4F $GPZDA,181813,00,14,10,2003,00,00*4F

Table 6-4: ZDA message comparison

In the J21 the hour, minute, second portion within the ZDA message will look like this:

(for hour: 01, minute: 02, and seconds 10, 11, 12,…)

,010210.00,

,010211.00,

,010212.00,

In the J31 the following will be output for the hour, minute and second:

,010210,

,010211,

,010212,

Thus the J21 format simply appends the xed string “.00” to the two digit seconds eld.

NOTE: With J31, the ZDA message format does not include the additional two digit elds as

described above.

6.2.4 VTG message

J31 J21

VTG $GPVTG,309.62,T,286,52,M,0.13,N,0.20,

K,A*23

$GPVTG,309.6,T,286,5,M,0.130,N,0.200,

K,A*23

Table 6-5: VTG message comparison

NOTE: The J31 does not currently support Magnetic variation.

$GPVTG,26.96,T,,M,0.05,N,0.1,K*5F

6.2.5 RMC message

J31 J21

RMC $GPRMC,161229,487,A,3723.2475,N,1215

8.3416,W,0.130,309.62,120598,,E*10

$GPRMC,161229,A,3723.2475,N,12158.34

16,W,0.130,309.6,120598,23.1,E*10

Table 6-6: RMC message comparison

Note:

There is additional resolution in the time eld:

,161229,487,

There is additional resolution in the Course over Ground eld:

,309.62,

Note: The J31 does not support magnetic variation.

J31 output:

$GPRMC,133138.000,A,5133.2768,N,00150.4530,W,0.05,26.96,030907,,*20

6.2.6 GSA message

J31 J21

GSA $GPGSA,A,3,07,02,26,27,09,04,15,,,,,,1.8,

1.0,1.5*33

$GPGSA,A,3,07,02,26,27,09,04,15,,,,,,1.80

,1.00,1.50*33

Table 6-7: GSA message comparison

Note:

There is reduced resolution on the DOP eld indicators:

,1.8,1.0,1.5*33

J31 output:

$GPGSA,A,3,05,30,12,09,14,,,,,,,,5.1,2.5,4.4*38

6.2.7 GGA message

J31 J21

GGA $GPGGA,161229,487,3723.2475,N,12158.

3416,W,1,07,1.0,9.0,M,1.0,M,0.0,0000*18

$GPGGA,161229,3723.2475,N,12158.3416

,W,1,07,1.00,9.0,M,1.0,M,,*18

Table 6-8: GGA message comparison

Note:

There is additional resolution in the Time eld:

,161229,487,

There is a reduction of resolution in the DOP eld:

,1.0,

This was previously:

,1.00,

There are additional data elds:

,0.0,0.000*18

These are per the NMEA standard and are for the Differential station ID and Correction elds.

J31 output:

$GPGGA,133138.000,5133.2768,N,00150.4530,W,1,05,2.5,102.7,M,48.1,M,,0000*47

6.3 NMEA Input Messages

NMEA (National Marine Electronics Association) communications protocol is used for most

navigation devices as the common standard interface protocol to transmit data. The messages

below adhere to NMEA 0183 v.2.2 protocol. Please refer to SiRF NMEA Protocol Reference

Manual for a detailed description.

Below is a list of supported NMEA input messages:

Message ID J21 (GSW2) J31 (GSW3)

100 Yes Yes

101 Yes Yes

102 Yes Yes

103 Yes Yes

104 Yes Yes

105 Yes Yes

106 Yes Yes

107 No Yes

Table 6-9: NMEA input message comparison

Start – up header info

J31:

$PSRFTXT,Version GSW3.2.4Pat1_3.1.100.12-SDK001P1.00

$PSRFTXT,TOW: 0

$PSRFTXT,WK: 1399

$PSRFTXT,POS: 6378137 0 0

$PSRFTXT,CLK: 96250

$PSRFTXT,CHNL: 12

$PSRFTXT,Baud Rate: 9600

$PSRFTXT,NAVMAN SW Version: Jupiter30 v2.2 build 1 [S3]

$PTTK,ANT,1*71

Figure 6-2: Jupiter 31 NMEA message structure

$PTTK,ANT,1*71 message output at start-up if antenna OK. This message is not supported on

J21 platform. The J31 does not have antenna detection hardware and therefore the message is

not available unless external antenna detection circuitry is added.

J21:

$Version 2.3.2-GSW2-2.05.024-C1Prod1.5

$TOW: 0

$WK: 1438

$POS: 6378137 0 0

$CLK: 96000

$CHNL: 12

$Baud Rate: 4800 System clock: 12.277MHz

$HW Type: S2AM

$Asic Version: 0x23

$Clock Source: GPSCLK

$Internal Beacon: None

$NAVMAN SW Version: Jupiter21 v1.9 build 2 [ST]

$PSRF150,1*3E

Figure 6-3: Jupiter 21 NMEA message structure

$PSRF150,1*3E message output at start-up to indicate input messages can now be sent. This

message is not present on J31 SS3 software.

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6.4 SiRF binary protocol

6.4.1 Binary output messages

Below is a list of supported output messages:

Message ID J21 (GSW2) J31 (GSW3)

1 Yes No

2 Yes Yes

3No No

4 Yes Yes

5 No No

6 Yes Yes

7 Yes Yes

8 No Yes

9 Yes Yes

10 Yes Yes

11 Yes Yes

12 Yes Yes

13 Yes Yes

14 Yes Yes

15 Yes Yes

16 Yes No

17 Yes No

18 Yes Yes

19 Yes Yes

Table 6-10: SiRF Binary output messages

Please refer to the SiRF Binary Protocol Reference Manual for additional information.

6.4.2 Binary input messages

Below is a list of supported input messages for the J21(GSW2) and J31(GSW3).

Message ID J21 (GSW2) J31 (GSW3)

53 No No

128 Yes Yes

129 Yes Yes

130 Yes Yes

131 No Yes

132 Yes No

133 Yes No

134 Yes Yes

135 No Yes

136 Yes Yes

137 Yes Yes

138 Yes No

139 Yes Yes

140 Yes Yes

141 No No

142 No No

143 Yes Yes

144 Yes Yes

145 Yes No

146 Yes Yes

147 Yes Yes

148 Yes No

149 Yes Yes

150 Yes Yes

151 Yes No

152 Yes Yes

165 Yes Yes

166 Yes Yes

167 Yes Yes

168 Yes Yes

170 2.3 or above Yes

172 No Yes

175 No Yes

180 Yes No

180 ~ 199 Yes Yes

182 No No

228 No Yes (reserved)

Table 6-11: SiRF Binary input message comparison

Please refer to the SiRF Binary Protocol Reference Manual for additional information.

7.0 Support

7.1 Sales support

Americas: Joe.tuttle@navmanwireless.com

Asia/Pacic: Steve.hyga[email protected]

EMEA: Alastair.wor[email protected]m

7.2 Technical support:

Americas: Pat.sulliv[email protected]

Asia/Pacic: Steve.hyga[email protected]

EMEA: Gary.hunkin@navmanwireless.com

Information in this document is provided in connection with Navman Wireless (‘Navman’) products. These materials are

provided by Navman as a service to its customers and may be used for informational purposes only. Navman assumes

no responsibility for errors or omissions in these materials. Navman may make changes to specications and product

descriptions at any time, without notice. Navman makes no commitment to update the information and shall have no

responsibility whatsoever for conicts or incompatibilities arising from future changes to its specications and product

descriptions. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by

this document. Except as provided in Navman’s Terms and Conditions of Sale for such products, Navman assumes no

liability whatsoever.

THESE MATERIALS ARE PROVIDED ‘AS IS’ WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR

IMPLIED, RELATING TO SALE AND/OR USE OF NAVMAN PRODUCTS INCLUDING LIABILITY OR WARRANTIES

RELATING TO FITNESS FOR A PARTICULAR PURPOSE, CONSEQUENTIAL OR INCIDENTAL DAMAGES,

MERCHANTABILITY, OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY

RIGHT. NAVMAN FURTHER DOES NOT WARRANT THE ACCURACY OR COMPLETENESS OF THE INFORMATION,

TEXT, GRAPHICS OR OTHER ITEMS CONTAINED WITHIN THESE MATERIALS. NAVMAN SHALL NOT BE

LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING WITHOUT

LIMITATION, LOST REVENUES OR LOST PROFITS, WHICH MAY RESULT FROM THE USE OF THESE MATERIALS.

Navman products are not intended for use in medical, lifesaving or life sustaining applications. Navman customers using

or selling Navman products for use in such applications do so at their own risk and agree to fully indemnify Navman

for any damages resulting from such improper use or sale. Product names or services listed in this publication are for

identication purposes only, and may be trademarks of third parties. Third-party brands and names are the property of

their respective owners. Additional information, posted at www.navman.com, is incorporated by reference.

For technical questions, contact your local Navman OEM sales ofce or eld applications engineer. Please refer to

Navman Wireless OEM at www.navmanwireless.com

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