Input row drivers for programmable logic devices
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United States of America Patent
Stats
-
Jun 25, 1991
Grant Date -
N/A
app pub date -
Oct 31, 1989
filing date -
Oct 31, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Multi-function input pins in a programmable logic device are connected to select circuitry which is programmed at device program time. Output signals generated by one or more output logic macrocells are also connected to such select circuitry. The select circuitry generates a signal which is used to drive a row of the array. If an input pin is used for providing a control signal, it is not connected to the array, and the output circuitry can drive that row of the array with an output signal which it generates, or with an input signal obtained from an associated input/output pin.
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