A microcomputer having an electrically erasable and programmable nonvolatile memory into which data is written without prolonging the data write processing time, even when a data read request is issued during the data write processing operation. The microcomputer includes a data erasing/writing/reading...http://www.google.de/patents/US5287469?utm_source=gb-gplus-sharePatent US5287469 - Electrically erasable and programmable non-volatile memory (EEPROM), wherein write pulses can be interrupted by subsequently received read requests