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PAS 9764/DIO : 32 Channel VME Change of State Card with Time Stamping

Links to printable product info:

• Product Manual

The PAS 9764/DI is a VME based, 32 channel, digital input card with Change of State (COS) detection and time stamping. Input signals are monitored and when a change of state is detected, the card will store the state of the input signals and the time of the change as determined by an internal clock in an on board FIFO memory. The FIFO can be read from the VME bus to retrieve the input state and time data. VME interrupts will be generated in the event of transitions on selected input signals.

This card can be used in VME systems with A16, A24, or A32 addressing, and data bus widths of 16 and 32 bits are supported. Jumper plugs are used to configure the width of the address bus. VME instruction types determine the width of the data bus. The input signals are connected to a pair of 50 position shrouded headers mounted through the  front panel. A board identifier PROM, interrupt vector register, and control register are  provided in addition to the 32 bit counter and 64K word by 32 bit FIFO.

Key Features

• 32 differential input bits with characteristics specified by EIA-422B

• Input signals on two 50 position shrouded headers at the front panel.

• Detects change of state on low to high transition or high to low transition.

• Time stamps every transition and stores data and time stamp in a FIFO memory. The FIFO is 32 bits wide by 64K words deep.

• VME interrupts are generated if the line that changed was enabled to generate interrupts.

• VME bus reads 32 bits of data followed by 32 bits of time from the FIFO.

• Counters are enabled with a control word write.

• Status register contains the following bits; Pass, Fail, Monitor Enable, Interrupt Enable, Interrupt Level, Counter Rate, FIFO Empty, FIFO Half Full, FIFO Full.
  

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