Features • Protocol – UART Used as Physical Layer – Based on the Intel Hex-type Records – Autobaud • In-System Programming – Read/Write Flash and EEPROM Memories – Read Device ID – Full-chip Erase – Read/Write Configuration Bytes – Security Setting From ISP Command – Remote Application Start Command • In-Application Programming/Self Programming – Read/Write Flash and EEPROM Memories – Read Device ID – Block Erase – Read/Write Configuration Bytes – Bootloader Start Description This document describes the UART bootloader functionalities as well as the serial protocol to efficiently perform operations on the on chip Flash (EEPROM) memories. Additional information on the AT89C51AC3 product can be found in the AT89C51AC3 datasheet and the AT89C51AC3 errata sheet available on the Atmel web site.
