Elton User Manual Rev 1.04
Page 48
14. DATA ACQUISITION (DAQ) SUBSYSTEM
SAM Data Acquisition Circuit
Overview
Elton baseboard implements a data acquisition circuit with analog input, analog output, and digital I/O
interfaces in conjunction with the NVidia Jetson AGX Xavier Series Module, which integrates a built-in DAQ
subsystem supported by the Atmel SAM D51 Microcontroller Series Part No.
from
Microchip, to control and monitor “real world” devices.
A Programming Library provides resources for the development of custom applications along with a
Graphical User Interface (GUI) that enables users to control the data acquisition I/O interface and data
logging parameters.
Key features include:
6 Analog inputs, 0-3.3V input range, 12-bit resolution (1 part in 4096)
2 Analog outputs, 0-3.3V output range, 12-bit resolution (1 part in 4096)
13 Digital I/O (GPIO), 3.3V logic levels
Miscellaneous board-specific controls
All DAQ I/Os are accessed on a 26-pin (2x13) 2mm pitch connector. Refer to Section:
for the pinout specifications.
The connector contains both analog and digital signals along with separate Grounds for each signal group.
For noise cancellation procedures on the analog signals, all analog I/O connections must be referenced to
the analog Ground pins 9 and 10, and all digital I/O signals must be referenced to the digital Ground pins 11
and 26.
A standard 2x13 2mm pitch ribbon cable connector or Diamond Systems non-latching cable No. 6980516
or latching cable No.6980606 can be plugged into the connector.
The Atmel SAM D51 microcontroller communicates with the AGX Xavier Series Module via a Serial
Peripheral Interface (SPI) port. The SAM DAQ functions are controlled using the Programming Library
included in the
Elton baseboard’s operating system image files.
Refer to
located at Diamond Systems Corporate GitBook site for detailed
information.
Analog Inputs
Analog Input sensors convert a voltage level signal into a digital value that can be analyzed, stored, and
controlled.
The six analog inputs feature a 12-bit native resolution and single-ended 0-3.3V input range. The
microcontroller is configured to use an external 3.3V reference voltage provided by a reference voltage IC
on the board for improved accuracy.
Analog Input
No. of Channels
6 Single-Ended or 3 Differential Inputs
Resolution
0x00112-bits (1 part in 4096) Native
Up to 16-bits with Software Averaging
Input Voltage Range
0-3.3V
Sample rate
Maximum 1 KHz Using Diamond System Programming Library
Warning!
There is no built-in protection circuitry on the analog inputs. Input voltages above the 3.3V
maximum range may cause damage to the SAM microcontroller.
