LENA-R8 series - System integration manual
UBX-22015376 - R02
System description
Page 31 of 116
C1-Public
1.17
GNSS serial communication interface
☞
LENA-R8001 modules do not include a GNSS receiver: GNSS UART interface is not available.
1.17.1
GNSS UART interface
LENA-R8001M10 modules supports a 1.8 V UART interface consisting of the
RXD_GNSS
data input
line and the
TXD_GNSS
data output line, directly connected to the internal u-blox M10 GNSS chipset
(as is illustrated in
).
The GNSS UART can be used as serial interface for direct communication between the internal u-blox
M10 GNSS chipset and an external host.
The GNSS UART interface supports configurable baud rates. The default baud rate is 38
’
400 bit/s,
with 8N1 (8 data bits, no parity, 1 stop bit) default frame format.
Neither handshaking signals nor hardware flow control signals are available i
n the UART interface.
For more information about GNSS UART interface, see the u-blox M10 standard precision GNSS chip
data sheet
, integration manual
☞
It is recommended to provide access to the
RXD_GNSS
and
TXD_GNSS
pins of LENA-R8001M10
modules for diagnostic purpose, by means of test points directly connected to the pins.
1.18
GNSS Peripheral Input/Output
☞
LENA-R8001 modules do not include a GNSS receiver: GNSS PIOs are not available.
LENA-R8001M10 modules provide the following 1.8 V peripheral output pins directly connected to
the internal u-blox M10 GNSS chipset (as is illustrated in
•
The
TIMEPULSE
output pin features time pulse signal. Make sure there is no load at this pin, which
could cause the pin being low at startup.
•
The
EXTINT
external interrupt input pin, which can be used for functions such as accurate external
frequency aiding, time mark aiding, wake up from power save mode, and ON/OFF control of the
GNSS receiver.
For more information about GNSS peripheral input/output, see the u-blox M10 standard precision
GNSS chip data sheet
, and interface description
