LEA-6 / NEO-6 - Hardware Integration Manual
GPS.G6-HW-09007-A Preliminary Hardware description
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The Power Save mode is an autonomous mode that does not require dynamic interaction by the application
engine, i.e. after the configuration settings communicated to the u-blox 6 receiver, the application does not
need to take care of switching off and on the receiver to obtain low power consumption.
With NEO-6G the Power Save Mode does not achieve lowest possible current during backup mode (SW backup
current). This leads to reduced power savings only for the combination of very long off-times (several hours) and
1.8 V supply. For this scenario, better current savings can be achieved if the Module is externally turned off.
Please refer to the u-blox 6 Receiver Description including Protocol Specification [3] for more information. This
document is available on the
ublox website.
Power Save mode is not available with LEA-6R.
1.4 Antenna supply - V_ANT (LEA-6)
LEA-6 modules support active antenna supply and supervision use the pin V_ANT to supply the active antenna.
Use a 10R resistor in front of V_ANT. For more information about antenna and antenna supervisor see chapter
2.5.
1.5 System functions
1.5.1 EXTINT - External interrupt pin
EXTINT0 is an external interrupt pin used for the time mark function on LEA-6T.
It can be used for wake-up functions in Power Save mode on all LEA-6 and NEO-6 modules.
1.5.2 System monitoring
The u-blox-6 receiver modules provide system monitoring functions that allow the operation of the embedded
processor and associated peripherals to be supervised. These System Monitoring functions are output as part of
the UBX protocol, class ‘MON’.
Please refer to the u-blox 6 Receiver Description including Protocol Specification [3]. For more information on
UBX messages, serial interfaces for design analysis and individual system monitoring functions.
1.6 Interfaces
1.6.1 UART
u-blox 6 modules include a Universal Asynchronous Receiver Transmitter (UART) serial interface. RxD1/TxD1
supports data rates from 4.8 to 230.4 kBit/s. The signal output and input levels are 0 V to VCC. An interface
based on RS232 standard levels (+/- 12 V) can be realized using level shifters such as Maxim MAX3232.
Hardware handshake signals and synchronous operation are not supported.
For the default settings see the module data sheet.
1.6.2 USB
The u-blox 6 Universal Serial Bus (USB) interface supports the full-speed data rate of 12 Mbit/s.
1.6.2.1 USB external components
The USB interface requires some external components in order to implement the physical characteristics required
by the USB 2.0 specification. These external components are shown in Figure 4 and listed in Table 1.
In order to comply with USB specifications, VBUS must be connected through a LDO (U1) to pin VDD_USB of
the module.
If the USB device is self-powered it is possible that the power supply (VCC) is shut down and the Baseband-IC
core is not powered. Since VBUS is still available, it still would be signaled to the USB host that the device is
present and ready to communicate. This is not desired and thus the LDO (U1) should be disabled using the