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

Image Number 8 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
Polyester resin for toner, electrostatic charge image developing toner, electrostatic charge image developer, toner cartridge, process cartridge, image forming apparatus, and image forming met
Perspective runway system
Baseball player stationery tab
Polymeric compositions including their uses and methods of production
Method and apparatus for distributing promotional materials
Method of sending CTI messages in a communication system
Random access for wireless multiple-access communication systems
  Randomly Featured Patents
Set-associative cache memory having incremental access latencies among sets
Use of a situational network for navigation and travel
Method for determining time borders and frequency resolutions for spectral envelope coding
System and method of resolving outliers in NIRS cerebral oximetry
Temporarily blocking the bore of a pipe through which a fluid flows with a foamed plug removed by dissolving
Wireless local area network device supporting enhanced call functions
Night vision CMOS imager with optical pixel cavity
Aviation application setting antenna array and integrated temperature sensor
Method for machining/cleaning by hydroxide ion in ultrapure water
Fuel cell system for a vehicle, method for monitoring a fuel cell system