MD-DIO Matrix VME Module

The Kontron / Thales / Cetia Mx-DIO Series Digital I/O Module provides either 48 or 96 lines of TTL I/O. Each input line has a minimum of 0.4V of hysteresis to ensure accurate readings in an electrically noisy environment or whenever the signals change slowly.

Using the Direction Control Registers (DCRs), the data lines of the DIO are configured by software to be either input or output lines. The DCR allows the direction of a single line to be specified, eliminating wasted I/O lines. All on-board control, interrupt, and data registers are directly addressable from the VMEbus, providing an efficient software interface with minimal system delays.

The DIO has 16 lines which serve as interrupt sources. Each of these lines can be individually masked and configured for interrupting on high-going or low-going edges. Users can choose between priority or polling interrupt modes. The priority mode provides a vector offset with the binary address of the highest interrupt generating line. The polling mode generates a generic vector, allowing the user to read a secondary register to determine the causes of the interrupt. With programmable interrupt-source capability, the DIO easily manages applications requiring priority servicing.

The DIO comes in three versions: industrial (MD-DIO), extended temperature (MX-DIO) and rugged/extended temperature (MR-DIO) versions. Both the MX and MR versions are designed, tested, and guaranteed to perform dependably in environments from -40° to +85°C. The MR version also withstands extreme shock and vibration.