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3.7 VMEbus Interface

3.7.2 Interrupter Function

The interrupter can place an interrupt on a jumper selectable IRQ level. An asserted interrupt line will be negated as soon as the VMEbus master acknowledges the interrupt by reading the Status/ID byte. This is called Release On Acknowledge (ROAK).

The least significant five bits (bit 4-0) of the Status/ID byte is the Module ID. Bit 5 and 6 are hardwired to logic '1'. The most significant bit (bit 7) is set by the ID7 bit in the ID7 control register. The Status/ID byte ranges from $60-$FF depending on the Module ID value installed and the value of the ID7 bit.

CC175 - Dual Channel Intelligent CAN Interface for VMEbus - 30 SEP 1996
Copyright © 1996 Compcontrol, Inc.

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