Resources Contact Us Home
Single chip microcomputer with patching and configuration controlled by on-board non-volatile memory

Image Number 6 for United States Patent #4802119.

A single chip microcomputer with patching and configuration is provided with blocks of patch memory which may be patched over faulty and/or obsolete areas of the microcomputer's memory map under control of starting address registers which are implemented in on-board non-volatile memory. The starting address registers, and enable registers which control whether each patch block is placed in the memory map, are programmable under control of the microcomputer's CPU. Newly programmed values in these registers are not effective to alter the memory map until a reset sequence enables a latch. In particular embodiments, patch blocks may overlie mask ROM, internal EPROM and/or EEPROM, external memory or devices or any other desireable portion of the memory map.

  Recently Added Patents
Exposure method, exposure apparatus, and method for producing device
Substrate and patterning device for use in metrology, metrology method and device manufacturing method
Memristive junction with intrinsic rectifier
Exposure apparatus, exposure method, and device manufacturing method
Video reproducing apparatus and video reproducing method
Systems and methods for managing and utilizing excess corn residue
  Randomly Featured Patents
Optical transceiver over single communication link
Method of manufacturing and utilizing cellulosic fiber identification tags for wooden articles
Methods of returning merchandise purchased by a customer from a vendor, computer implemented methods performed by a vendor, and return of merchandise processing apparatuses
Vehicle for the automatic laying of a track by a vehicle travelling on said track and track designed for installation by such a vehicle
Producing method of light emitting diode device and light emitting diode element
Compositions and methods for modulating an immune response
Advanced magnetically-stabilized couplings and bearings, for use in mechanical drives
Steel strip for three-piece can body, production process thereof and resistance seam welded three-piece can body
Inverted-design optical microscope
Method for the genetic detection of microorganisms