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DEWE-ORION-0824-20x
EXT_CLKx
internal signal:
ADC sample clock
or 80 MHz
DIR_CLK
1
N0
internal signal:
CLK1 I/O
DIR_CLK1
1
N1
EXT_Trigger
internal signal:
start of acquisition
DIR_Trigger
EXT_CLK1
internal signal:
CLK2 I/O
DIR_CLK2
1
N2
EXT_CLK2
Figure 7: Clock and trigger I/O configuration
The direction (input or output) of each pin can be switched separately.
2.7 CAN interface
As an option the DEWE-ORION-0824-20x also can be suited with two high speed CAN interfaces. Both ports
are compatible with CAN 2.0B specification. The CAN transceiver (TI SN65HVD235) has a bus-pin fault
protection of up to ±36 V.
The main application for these CAN-ports is acquiring CAN data together with analog data. Although the
CAN data is asynchronous to the analog data, the DEWE-ORION-0824-20x series guarantees perfect
synchronization. Each incoming CAN message is directly time stamped to the analog sample count number
before the data is transferred to the application software.
If just CAN acquisition of CAN messages is required the “Listen Only” mode can be used. In this mode the
DEWE-ORION-0824-20x board generates no output data even if the CAN-baud-rate is wrong selected. But
this mode is not working using just a direct connection to a sensor. In a point-to-point connection the “Listen
Only” mode has to be deactivated at the CAN-Interface. The setup in DEWESoft is shown in the screenshot
on the next page.
CAN setup in DEWESoft
Содержание DEWE-ORION-0824-20 Series
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