u-blox LEA-6 Series - Page 23

LEA-6 / NEO-6 - Hardware Integration Manual
GPS.G6-HW-09007-A Preliminary Design-in
Page 23 of 62
Function PIN No I/O Description Remarks
UART TxD1 3 O Serial Port 1 Serial port output. Leave open if not used.
RxD1 4 I Serial Port 1
Serial port input with internal pull-up resistor to VCC. Leave open if
not used. Don’t use external pull up resistor.
USB USB_DM 25 I/O USB I/O line USB2.0 bidirectional communication pin. Leave open if unused.
Implementation see Section 1.6.2.
USB_DP 26 I/O USB I/O line
System RESET_N 10 I Hardware Reset
(Active Low)
Leave open if not used. Do not drive high.
TIMEPULSE 28 O Timepulse
Signal
Configurable Timepulse signal (one pulse per second by default).
Leave open if not used.
EXTINT0
/SPEED
27 I Ext. Interrupt
/Odometer
Ext. Interrupt Pin. Int. pull-up resistor to VCC. Leave open if unused.
LEA-6R: Odometer speed
CFG_COM1
/NC
/SPI_SCS2_N
/TIMEPULSE2
9 I Config. Pin
/NC
/SPI
/TIMEPULSE2
LEA-6S, LEA-6A: Leave open for default configuration.
LEA-6H: Do not connect
LEA-6R: SPI select 2
LEA-6T: TIMEPULSE2
SDA2
/SPI_MOSI
1 I/O DDC Pins
/SPI
DDC Data. Leave open if not used.
LEA-6R: SPI MOSI
SCL2
/SPI_MISO
2 I/O DDC Pins
/SPI
DDC Clock. Leave open if not used.
LEA-6R: SPI MISO
Reserved 12 I Leave open, do not drive low.
NC 5 Can be left open, but connection to VCC is recommended for
compatibility reasons. I/O voltage is always VCC.
NC
/FWD
21 Not Connect
/Direction
Leave open
LEA-6R: Forward / Backward indication
NC
/SPI_ SCS1_N
22 Not Connect
/SPI
Leave open
LEA-6R: SPI select 1
NC
/SPI_SCK
23 Not Connect
/SPI
Leave open
LEA-6R: SPI clock
Table 4: Pin description LEA-6
2.2.2.1 Second time pulse for LEA-6T
LEA-6T includes a second time pulse pin (TIMEPULSE2). New designs must take this pin into consideration in
order to take advantage of this new feature. For more information see the LEA-6 Data Sheet [1] and see also the
u-blox 6 Receiver Description including Protocol Specification [3] for more information on configuration.
2.2.2.2 LEA-6R considerations
LEA-6R includes the following special pins:
SPI_MOSI, SPI_MISO, SPI_SCS2_N, FWD, SPI_ SCS1_N, SPI_SCK, and SPEED.
For more information see the LEA-6R Integration Considerations Application Note [5].
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