Keithley KPCI-PIO32IOA, Руководство пользователя

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4-2 External Interrupts KPCI-PIO32IOA and KPCI-PDISO8A User’s Manual
Using DriverLINX, you can program the driver to read or write data every time the board detects
the rising edge or the falling edge of an external interrupt signal.
Section 4 explains external
interrupt signal connections and summarizes interrupt usage for the KPCI-PIO32IOA and
KPCI-PDISO8A boards. For more information, refer to
Using DriverLINX with Your
Hardware-Keithley and other DriverLINX manuals.
External interrupt description
Through DriverLINX, you can alternatively configure two of the input lines for the following
external interrupt functions:
•
INT_ENN (external interrupt enable, active low)
•
INT_REQ (external interrupt request, edge triggered)
Interrupt pins
The interrupt pins on the I/O connector of the KPCI-PIO32IOA and KPCI-PDISO8A boards,
and the corresponding screw terminal on the STP-36 screw terminal accessory, are identified in
Table 4-1 .
Through DriverLINX, you can independently configure the input port so that an external inter-
rupt request pulse causes the data at the input ports to be placed into a buffer.
Through DriverLINX, you can also configure interrupts to be edge-clocked for either of the fol-
lowing conditions:
• The rising (positive) edge of the external interrupt request signal
• The falling (negative) edge of the external interrupt request signal
NOTE Positive-edge clocking and no latching are the defaults upon power-up
or reset.
Table 4-1
Connector pins used for external interrupt function
Interrupt Function
Connector pins that are configurable for either
interrupt or general-purpose functions
Corresponding
General-Purpose
Function Description
Signal
Designator
KPCI-PIO32IOA and
KPCI-PDISO8A I/O
Connector, J101
STP-36
Screw Terminal
External interrupt enable INT_ENN 3, 21 3, 21 IP7
External interrupt request INT_REQ 4, 22 4, 22 IP6