Resources Contact Us Home
Programmable input/output circuit and programmable logic device

Image Number 2 for United States Patent #4987319.

In a programmable input/output circuit which is used in a programmable integrated circuit, for interfacing between an external circuit and an internal logic circuit, both disposed exteriorly and interiorly of said integrated circuit, an input/output terminal connected to a bus of the internal logic circuit and a tri-state input buffer are provided, and hereby assured that an external input signal is transmitted to either of the input/output terminal and an ordinary input terminal by switching the status of the tri-state input buffer. In a programmable logic device, which incorporates said input/output circuit, a tri-state buffer is provided between an input/output circuit block and a wiring element, and hereby a driving capability of the wiring element used as a bus line is increased.

  Recently Added Patents
Compositions of quaternary ammonium compounds containing bioavailability enhancers
Display device and method of manufacturing the same
Catecholic butanes and use thereof for cancer therapy
Method and system for detecting data modification within computing device
Tie down strap hook
Vaccine composition against Streptococcus pyogenes
Buckle (tube)
  Randomly Featured Patents
Method for the production of 6,12-dihydro-6-hydroxy-cannabidiol and the use thereof for the production of trans-delta-9-tetrahydrocannabinol
System and method for inputting special characters
Method for fabricating a semiconductor device
Motor operated jack for vehicles
Device for checking numbers and method for checking numbers
Putter-type golf club head with an insert
Process for producing amino acid or salt thereof by column technique and production apparatus thereof
Clematis plant named `Zomoa`
Convertible game table