ELLIPSE2 AHRS & INS
– Hardware Manual
ELLIPSE2HM.1.3
3. Interfaces specifications
3.1. Overview
The Ellipse features up to five serial interfaces (Port A to Port E) which provide all the main features of the
Ellipse: Configuration, data input, data output.
In addition, the Ellipse supports CAN 2.0A/B connectivity to output log messages. Due to the CAN
implementation and limitations (payload limited to 8 bytes), the CAN interface is not handled like the other
interfaces.
Due to the limited number of pins inside the Ellipse connectors, some pins provide different functions which
are multiplexed and cannot be used at the same time.
3.1.1. Interfaces availability and multiplexing
The following table provides more details about each port specificity in terms of availability, and
capabilities:
Port
Available
models
Available
package
options
Tx / Rx
capability
RS-232/422 configuration
Cable / software defined
Other functions / multiplexing
PORT A
All
All
Tx/Rx
Cable
RS-422 available on B1 and L2 units only
PORT B
E
All
Rx
RS-232 only
Multiplexed with Sync IN B and OOD A
PORT C
E / D
All
Tx/Rx
Software on ELLIPSE-E
Cable on ELLIPSE-D
Tx function on ELLIPSE-D is limited to
certain standard NMEA messages (direct
GPS outputs)
PORT D
E/D
All
Rx
RS-232 only
PORT E
All
B1, L1,L2
Tx/Rx
RS-232 only
Only available when PORT A is in RS-232
mode
CAN
All
B2, L1, L2
Tx only
-
SYNC IN A
All
All
input
-
Multiplexed with ODO B
SYNC IN B
All
All
input
-
Multiplexed with PORT B and ODO A
SYNC IN C
E
All
input
-
SYNC IN D
E, D
All
input
-
SYNC OUT A
All
All
output
-
SYNC OUT B
All
All
output
-
ODO A
E/N/D
All
input
-
Multiplexed with SYNC IN B and PORT B
ODO B
E/N/D
All
input
-
Multiplexed with SYNC IN A
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