• 32 bits of high-voltage digital Change-of-State inputs (COS)
• COS is programmable to respond to rising edge only, falling edge only, or
any edge on a byte-selectable basis
• Each group of 8 inputs are jumper-selectable to monitor: contact closure,
voltage sourcing (including TTL levels), or current sinking
• Contact debounce is jumper-selectable: 10
ms, 1, 5, or 10 ms
• Input voltage range: 0 to 66 V
• User-selectable input voltage thresholds (+0.6 to +38 V)
• 8-, 16-, or 32-bit data transfers
• COS data is stored 512 bytes deep to prevent latency loss
• Double Eurocard form factor with P2 inputs and front panel with fail LED
• High reliability DIN-type input connector (P2)
• Change-of-State port (four) identified by a unique programmable interrupt
vector
INTRODUCTION — The VMIVME-1181 is a
32-channel P2 input board with Change-of-State (COS)
interrupt capabilities. The interrupt control logic can be
programmed to issue an interrupt upon specific state
changes. The user selects the state change to use by
programming the Control and Status Register (CSR) for the
desired activity. This board will store up to 512 state
changes as long as the COS logic is enabled. This will
prevent the board from losing a state change during
interrupt servicing. The VMIVME-1181 supports
Built-in-Test (BIT). BIT registers are available to test the
active components of the input data paths on the board. The
board also supports byte, word, and longword data transfers,
during basic input data operations.