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).
Pi
n
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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