LEA-6 / NEO-6 - Hardware Integration Manual
GPS.G6-HW-09007-A Preliminary Appendix
Page 52 of 62
firmware download in their application processor, will need to replace the software. A template is available from
your u-blox support team.
Please refer to the u-blox 6 Receiver Description including Protocol Specification [3]
for more information. This
document is available on the
ublox website.
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 as u-blox 6 has higher currents than
ANTARIS 4 (peak currents & backup current see datasheet 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.
For more information see the LEA-6 Data Sheet [1] and LEA-5 Data Sheet [7].
B.4 Migration of LEA modules
B.4.1 Migration from LEA-4 to LEA-6
See also the migration Table in the u-blox5 Hardware Integration Manual.
For u-blox6 the Input Voltage thresholds on the pins RXD1 and EXTINT0 have changed.
The Safeboot functionality is inverted compared to Antaris receivers.
VCC_OUT is now VCC and not 1.8 V as on Antaris Modules.
Also check your power supply requirements with the datasheet (for VCC and VBCKP).
Pin
LEA-4H/LEA-4P/LEA-4T LEA-6H/LEA-6T Remarks for Migration
Pin Name Typical Assignment Pin Name Typical Assignment
1 Reserved
VDDIO level I/O;
not connected
SDA2 NC
2 Reserved
VDDIO level I/O;
not connected
SCL2 NC
3 TXD1 VDDIO level I/O TxD1 Output
4 RXD1 VDDIO level I/O RxD1 Input Leave open if not used.
5 VDDIO 1.65 – 3.60V NC Connect to VCC
Can be left open, but connection to VCC is
recommended for compatibility reason. With LEA-
6H the I/O voltage is always VCC.
6 VCC 2.70 – 3.30V VCC 2.70 – 3.60V
Extended power supply range, higher peak supply
current.
7 GND GND GND GND No difference
8 VDD18OUT NC VCC_OUT NC
Internally connected to VCC, if you have circuitry
connected to this pin, check if it withstands the
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