T89C51RD2-3CSCM 查看數據表（PDF） - Atmel Corporation

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T89C51RD2-3CSCM

0 to 40MHz Flash Programmable 8-bit Microcontroller

Atmel Corporation 

T89C51RD2

Bootloader Architecture

Introduction

The bootloader manages a communication according to a specific defined protocol to

provide the whole access and service on Flash memory. Furthermore, all accesses and

routines can be called from the user application.

Figure 22. Diagram Context Description

Acronyms

Access via

Specific

Protocol

Access From

User

Application

Bootloader

ISP: In-system Programming

SBV: Software Boot Vector

BSB: Boot Status Byte

SSB: Software Security Bit

Flash Memory

59

4243G–8051–05/03

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