ZED-F9R-Integration manual
For more information about the default configuration, see the applicable interface description [2].
3.1.3 Default interface settings
Interface Settings
UART1 output
38400 baud, 8 bits, no parity bit, 1 stop bit.
NMEA protocol with GGA, GLL, GSA, GSV, RMC, VTG, TXT messages are output by default.
UBX protocol is enabled by default but no output messages are enabled by default.
RTCM 3.3 protocol output is not supported.
UART1 input
38400 baud, 8 bits, no parity bit, 1 stop bit.
UBX, NMEA and RTCM 3.3 input protocols are enabled by default.
SPARTN input protocol is enabled by default.
UART2 output
38400 baud, 8 bits, no parity bit, 1 stop bit.
UBX protocol is disabled by default. It can be enabled as an output protocol from firmware version
HPS 1.30 onwards. It cannot be enabled as an output protocol on any of the previous firmware
versions and will not output UBX messages.
RTCM 3.3 protocol output is not supported.
NMEA protocol is disabled by default.
UART2 input
38400 baud, 8 bits, no parity bit, 1 stop bit.
UBX protocol is enabled by default from firmware version HPS 1.30 onwards. It can be enabled as
an input protocol on firmware version 1.30. It cannot be enabled as an input protocol on any of the
previous firmware versions and will not receive UBX input messages.
RTCM 3.3 protocol is enabled by default.
SPARTN protocol is enabled by default.
NMEA protocol is disabled by default.
USB Default messages activated as in UART1. Input/output protocols available as in UART1.
I2C
Fully compatible with the I2C
1
industry standard, available for communication with an external
host CPU or u-blox cellular modules, operated in slave mode only. Default messages activated as
in UART1. Input/output protocols available as in UART1. Maximum bit rate 400 kb/s.
SPI Allow communication to a host CPU, operated in slave mode only. Default messages activated as
in UART1. Input/output protocols available as in UART1. SPI is not available unless D_SEL pin is
set to low (see the D_SEL section).
Table 1: Default interface settings
UART2 can be configured as an RTCM interface. RTCM 3.3 is the default input protocol. UART2
may also be configured for NMEA output. NMEA GGA output is typically used with virtual reference
service correction services.
By default the ZED-F9R outputs NMEA messages that include satellite data for all GNSS
bands being received. This results in a high NMEA output load for each navigation period.
Make sure the UART baud rate used is sufficient for the selected navigation rate and the
number of GNSS signals being received.
Do not use UART2 as the only one interface to the host. Not all UBX functionality is available
on UART2, such as firmware upgrade, safeboot or backup modes functionalities. No start-up
boot screen is sent out from UART2.
3.1.4 Basic receiver configuration
This section summarizes the basic receiver configuration most commonly used.
1
I2C is a registered trademark of Philips/NXP
UBX-20039643 - R06
3 Receiver functionality Page 11 of 119
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