Keithley KPCI-3110, User Manual

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KPCI-3110 and KPCI-3116 User’s Manual Functional Description 2-21
To avoid this error, ensure that the host computer provides data to the Output FIFO faster than
the DACs are converting the data. You can read the value of the Output FIFO Counter to deter-
mine how many samples are in the Output FIFO.
If this error condition occurs, the board stops acquiring and transferring data to the host
computer.
NOTE
DriverLINX reports this error as a “DATA LOST” message.
Digital I/O features
This section describes the following features of the digital I/O subsystem:
•
Digital I/O lines
• Digital I/O resolution
•
Digital I/O operation modes
Digital I/O lines
KPCI-3110 and KPCI-3116 boards support 16 digital I/O lines through the digital input (DIN)
and output (DOUT) subsystems; both subsystems use the same digital I/O lines. These lines are
divided into two banks of eight: Bank A, lines 0 to 7; and Bank B, lines 0 to 7. You can use each
bank as either an input port or an output port; all eight lines within a bank have the same config-
uration. For example, if you use Bank A as an input port (port 0), lines 0 to 7 of Bank A are con-
figured as inputs. Likewise, if you use Bank B as an output port (port 1), lines 0 to 7 of Bank B
are configured as outputs.
Specify the digital I/O line to read or write in a single value digital I/O operation. Refer to
page 2-22 for more information on single value operations.
On power up or reset, no digital data is output from the board.
DriverLINX lets you dynamically reconfigure digital I/O ports at run time using a “Digital Setup
Event.” Refer to DriverLINX Digital I/O Programming Guide for information and limitations of
this function.