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

Image Number 2 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
Zero-copy network and file offload for web and application servers
Aspect ratio enhancement
Active constant power supply apparatus
Hybrid interconnect scheme including aluminum metal line in low-k dielectric
Image erasing apparatus and recording medium conveying method for image erasing apparatus
Wireless control system for a patient support apparatus
Methods and devices for multiple-mode radio frequency synthesizers
  Randomly Featured Patents
Insulated jumper in particular for terminal blocks of switchboards
Magnetic recording and/or reproducing apparatus
Surface pattern for a napkin providing the illusion of a three-dimensional arc rainbow
Non-invasive non-spectrophotometric infrared measurement of blood analyte concentrations
Drill chuck with cushioned full-open position
Power light emitting die package with reflecting lens and the method of making the same
Rotary clamp having a common plane mounting arrangement
Industrial fabric and yarn made from an improved fluoropolymer blend
System for operating a fuel supply system for an internal combustion engine, in particular of a motor vehicle
Securing device for the safety belt of a restraining system