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5.5 Save and Retrieve Configuration Data to Flash

The current settings of the Jupiter 32 will be stored in Flash memory upon a command from the

user. Refer to Application Note LA000266. All parameters are written as a set.

The following parameters can be stored and retrieved:

· Port A and B protocols

· Port A and B baud rates and frame formats

· NMEA per-message output rates and checksums

· SiRF Binary debug and raw tracker data output

· Datum

· Altitude hold mode, source and default

· Degraded mode and timeout

· DR timeout

· DOP mode and GDOP/PDOP/HDOP thresholds

· Elevation navigation mask

· Power navigation mask

· Static navigation mode

· Track smoothing mode

· TricklePower

mode, on time and interval

· Push-to-Fix mode, period, maximum off and acquisition times

· DGPS source

· SBAS default PRN

5.5.1 Writing to Flash

The module accepts NMEA messaging or SiRF Binary messaging. The protocols are

defined in the

Navman NMEA Reference Manual

(MN000315) and the

SiRF Binary Protocol

Reference Manual

. These documents describe the structure of the general commands.

NMEA Store to Flash Memory command
To store all relevant parameters to Flash, send the following NMEA sentence:

$PSRF198[*CS] <cr><lf>

SiRF Binary Store to Flash Memory command
To store all relevant parameters to Flash send a SiRF Binary message with Message ID 198.

A payload of this message should have a length of 1 byte.

5.5.2 Retrieving from Flash

At power-up, the unit will retrieve any configuration parameters stored in Flash and restore

them as a set. Individual parameters can not be restored. Settings stored in battery backed

memory are not over written.

To prevent parameters from being restored, drive the defaults pin GPIO Pad A5 to a logic

low.

Logic State

Power-up Action

high or floating

retrieves stored parameters in Flash on power-up if no data in

battery backup RAM

low (grounded)

ignores parameters stored in flash

Table 5-3: Actions based on signal state

5.5.3 Reverting to default settings

To restore the default settings, including deleting all parameters stored in Flash, send a

factory reset command in either the NMEA or SiRF Binary protocols.

Содержание Jupiter 32

Страница 1: ...or s Manual Related documents Jupiter 32 Product Brief LA000268 Jupiter 32 Data Sheet LA000267 Jupiter Development Kit Guide LA000645 Low Power Operating Modes Application Note LA000513 Jupiter 32 30...

Страница 2: ...kaging and delivery 13 4 0 Manufacturing process recommendations 15 4 1 Solder methods 15 4 1 1 Solder paste type 15 4 1 2 Solder paste mask size 15 4 1 3 Solder paste stencils 15 4 1 4 Reflow profile...

Страница 3: ...based on signal state 20 Figures Figure 2 1 Jupiter 32 mechanical layout 3 Figure 2 2 Basic Jupiter 32 application circuit 4 Figure 2 3 Example PCB layout for external active antenna 4 Figure 2 4 Deco...

Страница 4: ...ion This section introduces the system interface and provides the following physical specifications a electrical connections SMT pad interface b mounting PCB pad layout dimensions c manufacturing reco...

Страница 5: ...option DO NOT CONNECT B7 GPIO1 I O reserved C1 GND P ground C2 TCXO_IN I TCXO input for external TCXO build option DO NOT CONNECT C4 BOOT I active high to download flash firmware C5 LNA _EN O external...

Страница 6: ...ricklePower energy control The source impedance of the power supply must be kept sufficiently low The capacitance of the power supply and PCB track width determine the overall source impedance If a pa...

Страница 7: ...ANT F2 VBATT 1PPS E7 TXA D7 N_GPS_FIX D4 TXB F6 Coaxial Connector 50 ohm Microstrip A2 GND B1 GND GND A3 GND C1 GND E1 GND E2 TP TP See Section 2 5 1uF 10nF 3 0 3 6V 1 PPS 27 pF 27 pF 27 pF TP TP Batt...

Страница 8: ...llow the user to connect to these signals if a firmware upload or new configuration is required These test points can take the form of an unfitted through hole connector Refer to Figure 2 2 2 3 PCB de...

Страница 9: ...27pF LNA_EN C5 27pF 1PPS E7 27pF Note represents a parallel connection Table 2 2 Decoupling recommendations 2 3 4 Antenna connection The PCB layout design of the antenna input connection requires the...

Страница 10: ...na connection to the antenna input on the module a controlled impedance microstrip with a characteristic impedance of 50 ohms at 1 5GHz must be used The PCB parameters that affect impedance are as fol...

Страница 11: ...t not have vias sharp bends components overlaying the track 2 4 Antenna system design choices 2 4 1 Antenna types The role of the antenna is to filter amplify and down convert the incoming GPS signals...

Страница 12: ...f the coaxial cable is shorter than 3m it may experience too much gain at the receiver and degrade the performance There are some variations as to how the antenna will receive its power but it is usua...

Страница 13: ...if peak performance is required in very weak or obscured conditions 2 4 4 Jupiter module used as a GPS sensor The adapter board reference design shows how a Jupiter 32 GPS receiver module can be used...

Страница 14: ...s is MAX4785 The circuit is shown in Figure 2 9 Figure 2 9 External Active Antenna Control and Current Limit circuit Electro resistive fuses can be used to protect the supply over current These are av...

Страница 15: ...gure 2 10 Jupiter 32 adapter board Refer to Table 2 6 for a description of the connector interfaces Jupiter function J2 2 54 mm pitch header pin no VANT 1 no connection 2 VBATT 3 VDD 4 N_RESET 5 reser...

Страница 16: ...12 months at 40o C and 90 relative humidity RH 2 Peak package body temperature o C If blank see adjacent bar code label 3 After bag is opened devices that will be subject to reflow solder or other hi...

Страница 17: ...eserved Proprietary information and specifications subject to change without notice 14 Figure 3 3 Jupiter 32 Packaging 44 44mm 20 00 2 00 4 00 2 0 1 5 1 75 20 20 0 35 0 05 3 2 0 10 17 3 0 10 13 30 0 1...

Страница 18: ...ng point a 0 75 1 paste mask pad size ratio is recommended 4 1 3 Solder paste stencils A 0 125 mm 5 mil thick stencil is recommended with LGA 4 1 4 Reflow profile recommendations An optimal reflow pro...

Страница 19: ...ivered on a tape and reel package and sealed in an airtight bag The MSR Moisture Sensitivity Rating is 3 therefore they should be loaded and reflowed within 168 hours 7 days If the modules are in ambi...

Страница 20: ...r Once aligned the part should be placed on the site and attached to the board using the reflow profile used for the part removal 5 0 Software application information 5 1 Normal mode operation In norm...

Страница 21: ...ructure of the commands Navman has provided additional functionality to the NMEA protocol as detailed in the following sections 5 3 1 Default settings The default protocol is NMEA at a baud rate of 96...

Страница 22: ...parts per thousand c TricklePower on time milliseconds Note that Push To Fix does not require fields b and c so they may be left blank Table 5 1 Low power modes message values This message is the NME...

Страница 23: ...d in the Navman NMEA Reference Manual MN000315 and the SiRF Binary Protocol Reference Manual These documents describe the structure of the general commands NMEA Store to Flash Memory command To store...

Страница 24: ...ower Operating Modes Application Note LA000513 Command The profiles will be selected by an NMEA command PSRF197 n cr lf where n is the profile number 1 Automotive 2 Pedestrian 3 TricklePower 4 Push to...

Страница 25: ...of the pins are pads of bare gold plated copper that touch pins on the motherboard LNA Low Noise Amplifier A special type of amplifier used to amplify weak signals captured by an antenna MCX A type of...

Страница 26: ...D 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 O...

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