Generating And Receiving Digital Patterns And Waveforms-Pattern I/O; Deciding The Width Of Data To Transfer - National Instruments 653 Series User Manual

Chapter 2 Using Your NI 653X
Generating and Receiving Digital Patterns and
Waveforms—Pattern I/O
Feed external clocking signals into the PCLK pin for burst-mode handshaking and
Note
into the REQ pin when performing pattern I/O.

Deciding the Width of Data to Transfer

NI 653X User Manual
• LabVIEW—Use the Easy Digital I/O VI from the following list that is
appropriate for your task:
– Read from Digital Line VI to read from a single line
– Write to Digital Line VI to write to a single line
– Read from Digital Port VI to read from a digital port
– Write to Digital Port VI to write to a digital port
Set digital channel to
If one control/timing line is used or reserved, and you wish to use some or
all of the remaining lines for I/O, use the Advanced Digital I/O VIs
DIO Port Read VI or DIO Port Write VI. Set the bits in the line mask
parameter to the lines to use for I/O.
Using pattern I/O, you can acquire or generate patterns on every rising or
falling edge of a clock signal. The clock signal can be generated internally
by an onboard 32-bit counter set to a user-specified frequency, or the clock
signal can be received from the REQ pin in the I/O connector.
You can choose between a width of 8, 16, or 32 bits. Use the following
table to find the valid combinations of ports and timing controllers based
on the width of data you want to transfer.
Table 2-2. Port and Timing Controller Combinations
Transfer Possible Port
Width Combinations
8 bits Port 0 (DIOA<0..7>)
Port 2 (DIOC<0..7>)
and port width to
4
2-6
.
4
Timing Controllers
That Can Be Used
Group 1
Group 2
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