LEA-6 / NEO-6 / MAX-6 - Hardware Integration Manual
UBX-14054794 Production Information Appendix
Page 71 of 85
The default NMEA message set for u-blox 6 is GGA, GLL, GSA, GSV, RMC and VTG. Contrary to ANTARIS 4,
ZDA is disabled by default.
Firmware update is supported by all of these interfaces. The firmware update mechanism of u-blox 6 is more
sophisticated than with ANTARIS 4. It is now based on UBX protocol messages. Customers, who implemented
firmware download in their application processor, will need to replace the software. A template is available from
your u-blox support team.
In case migrating from LEA-4T or LEA-5T to LEA-6T-0, the command to save the configuration (UBX-CGF-CFG)
changes. This is because in LEA-6T-0 a serial Flash at the SPI is used instead of the parallel Flash (LEA-4T and LEA-
5T). So for the LEA-4T, LEA-5T, LEA-6T-1 and LEA-6T-2 the target to save the configuration has to be set to
“devFlash”, but for the LEA-6T-0 it has to be set to “devSpiFlash”.
Please refer to the u-blox 6 Receiver Description including Protocol Specification [4] for more information. This
document is available on the u-blox website.
B.2.2 Software migration from 6.02 to 7.03
Timing Survey-in Mode:
Customers using survey-in should review the changes in the accuracy limit parameters in CFG-TMODE and CFG-
TMODE2 in FW 7.03, as described in the u-blox 6 Firmware Version 7.0x Release Note [8], and the u-blox 6
Receiver Description including Protocol Specification [4]
B.2.3 Software migration from 7.03 to FW1.00 GLONASS, GPS & QZSS
When migrating from 7.03 to FW1.00 GLONASS, GPS & QZSS consult the GPS/GLONASS/QZSS Firmware 1.00
for u-blox 6 Release Note [7], and the u-blox 6 Receiver Description including Protocol Specification
(GPS/GLONASS/QZSS) [5].
B.3 Hardware Migration
B.3.1 Hardware Migration: ANTARIS 4 u-blox 6
u-blox 6 modules have been designed with backward compatibility in mind but some minor differences were
unavoidable. These minor differences will however not be relevant for the majority of the ANTARIS 4 designs.
Good performance requires a clean and stable power supply with minimal ripple. Care needs to be exercised in
selecting a strategy to achieve this. Avoid placing any resistance on the Vcc line. For better performance, use an
LDO to provide a clean supply at Vcc and consider the following:
Special attention needs to be paid to the power supply requirements. (currents & backup current see data
sheet for further details)
Wide power lines or even power planes are preferred.
Place LDO near the module.
Avoid resistive components in the power line (e.g. narrow power lines, coils, resistors, etc.).
Placing a filter or other source of resistance at Vcc can create significantly longer acquisition
times.
B.3.2 Hardware Migration: u-blox 5 u-blox 6
Check the pins RxD1 and EXTINT0 regarding the input voltage threshold.
Serial termination resistors: Recommendation has changed from 27 to 22 . See section 1.6.2.1.
For more information see the LEA-6 Data Sheet [1] and LEA-5 Data Sheet [10].
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