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93C66 national semiconductor

Abstract: 25C04 68HC11 AN-1012 HC11 MC68HC11 NM25C04 NM93C66 instruction set microcontroller 68HC11 Microwire EEPROM
Text: INTRODUCTION The SPI Serial Peripheral Interface provides a simple eight bit serial port useful in communicating with external devices. Prior to the SPI EEPROMs introduction, engineers used the standard MICROWIRE EEPROMs to interface with the SPI port. MICROWIRE’s diverse densities and data protection