3.5 Interrupt Inputs
The PCI-, PCI-Express- and CompactPCI-models of the ME-630
series offer 2 independent external interrupt inputs.
On standard models the inputs are of TTL-type (Low: 0 V…+0.8 V;
High: +2.0 V…+5.5 V), which require a reference to PC ground
(PC_GND) and are assembled with pull-up resistors on the board.
On models with option „-O“ the IRQ inputs are opto-isolated and
designed for 24 V level (Low: 0 V…+12 V; High: +13 V…+24 V).
The ground reference must refer to pin 45 (GND_IRQ).
As soon as a positive edge occurs an interrupt is initiated
(condition: interrupt enabled by software). The interrupt sources
are processed sequentially.
