Description
This document describes the USB bootloader functionalities as well as the USB protocol to efficiently perform operations on the on-chip Flash (EEPROM) memories. Additional information on the AT89C5131A product can be found in the AT89C5131A datasheet and the AT89C5131A errata sheet available on the Atmel web site.
The bootloader software package (binary) currently used for production is available from the Atmel web site.

Features
• Protocol
   – USB Used as Physical Layer
   – Device Firmware Upgrade Class Compliant
   – USB Clock Auto-Configuration
• 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 (IAP)
   – Read/Write Flash and EEPROM Memories
   – Read Device ID
   – Block Erase
   – Read/Write Configuration Bytes
   – Bootloader Start