Beckhoff EtherCAT IP Core for Xilinx FPGAs v3.00k Instrukcja Użytkownika Strona 56

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IP Core Configuration
III-44 Slave Controller IP Core for Xilinx FPGAs
5.1.5.2 Digital I/O Configuration
The Digital I/O PDI supports up to 4 Bytes of digital I/O signals. Each byte can be assigned as input or
output byte.
Figure 19: Register PDI Digital I/O Configuration
Number of digital I/Os
Total number of I/Os. Possible values are 1, 2, 3 or 4 Bytes.
Port Configuration
Defining byte-wise if digital I/Os are used as input or output byte
Input Mode
Defines the latch signal which is used to take over input data.
Latch at SOF (Start of Frame)
The inputs are latched just before the data have to be written in the frame.
Latch with ext. signal
Connected to DIGI_LATCH_IN. Application controls latching
Latch at Dist-Sync0
Latch input data with distributed clock Sync0 signal
Latch at Dist-Sync1
Latch input data with distributed clock Sync1 signal
Output Mode
Defines the trigger signal for data output.
Output at EOF (End of Frame)
The outputs will be set if the frame containing the data is received complete and error free.
Output at Dist-Sync0
Outputs will be set with Sync0 signal if distributed clocks are enabled.
Output at Dist-Sync1
Outputs will be set with Sync1 signal if distributed clocks are enabled.
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