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

Image Number 3 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
Systems and method for automatic color plane misregistration calibration
Control device for radiation imaging apparatus and control method therefor
Imaging apparatus having selection unit to select focus detection areas
Processing financial documents
Signal processing apparatus and methods
Maize variety X00C175
Methods and apparatus for power amplifier calibration
  Randomly Featured Patents
Luminaire housing with universal dual surface cantilever hinge
Methods for drug discovery, disease treatment, and diagnosis using metabolomics
Methods and devices for image processing with higher harmonics of an illumination grating
Massage device
Process for producing a substance
Portable power supply
Method for limiting the excess force of a closing part which is actuated by an external force
Captive volume device as a safe life monitor
Adjustable extrusion apparatus for producing thread-like products
Gas-cooled nuclear reactor