Beckhoff C1300 Manual do Utilizador descarregar pdf (Página 40)

C1300 VME to II/O Interface Unit Beckhoff II/O-System

Page 40 of 44 Version : 2.01 Date : 18.12.95

IRQ Data out:

----IO3IO2IO1IO0

If the VME system modifies this mask it will be transmitted into the interrupt field. The nibble

will be transmitted into the interrupt field, untill it is removed by the VME system.

IRQ Data in:

- - - - II3 II2 II1 II0

If a peripheral module generates an address-independent interrupt and if this interrupt is

released by the interrupt mask, it is transmitted through this mask to to the VME system.

Queueing interrupts are buffered by the C1300, i.e. there is only one interrupt at a time

transmitted through the GCB to the VME system. Only after this one was recognized by the

VME system ,the next interrupt can be transmitted

VMEbus interrupt vector and interrupt level register:

The C1300 includes a D08-VMEbus Interrupter. The interrupt vector may be dynamically

loaded at address 0FF1h and transfered to the VMEbus at the next valid IACK-cycle.The

interrupt level can be programmed at address 0FF0h. Only one interrupt level should be

activated at one time. Bit 0 of the interrupt level register has no meaning.

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Beckhoff C1300 Manual do Utilizador Página 40