User`s manual

20 Configuring the Agilent E1330B Digital I/O

Chapter 2

Selecting the Interrupt Line

The VXI peripheral interrupt bus consists of seven lines which can carry the

interrupt signal to the commander. The most common line to be used is line

one, as this is the usual default interrupt line. Many VXIbus commanders

have a way to change the interrupt line they manage (for example, the

E1405/06 has an interrupt line allocation table). When doing direct

interrupt line to a line that is not used by the SCPI driver. Module interrupt

priority can be established with these lines. In general, the higher the line

number, the higher the priority.

Referring to Figure 2-1, near the P1 connector you will find two sets of

jumper pins labeled X and 1 through 7 (JM15 and JM16). The Digital I/O

module is factory-shipped with the interrupt set to 1. If you need to change

the interrupt level you must move both jumpers on the blocks. Spare

jumpers, used for combining the flag (FLG) lines, are stored on the unused

ground pins of this connector when it ships from the factory.

Note The interrupt circuitry for the Agilent E1330B is implemented as release on

interrupt acknowledge (ROAK). The Agilent E1330B Digital I/O module

will de-assert (or release) the interrupt request line during an interrupt

acknowledge cycle.

The interrupt circuitry on the Agilent E1330A is implemented as release on

continue to assert the interrupt request line until the Port Control/Status

Both the Agilent E1330A and E1330B can be used with the Agilent

E1300B/E1301B and with the E1405A/B and E1406A. If you are using

Compiled SCPI (i.e., Agilent E1570A), you must use the Agilent E1330B.

Figure 2-4. Priority Interrupt Connector (Factory Setting)