AT89C5131A(2004) Просмотр технического описания (PDF) - Atmel Corporation

Номер в каталоге

Компоненты Описание

производитель

AT89C5131A
(Rev.:2004)

USB Microcontrollers

Atmel Corporation 

Functional

Description

The AT89C5131A bootloader facilitates In-System Programming and In-Application

Programming.

In-System Programming

Capability (IAP)

In-System Programming allows the user to program or reprogram a microcontroller on-

chip Flash memory without removing it from the system and without the need of a pre-

programmed application.

The USB bootloader can manage a communication with a host through the USB bus. It

can also access and perform requested operations on the on-chip Flash memory.

In-Application

Programming or Self

Programming Capability

(ISP)

In-Application Programming (IAP) allows the reprogramming of a microcontroller on-

chip Flash memory without removing it from the system and while the embedded appli-

cation is running.

The USB bootloader contains some Application Programming Interface routines named

API routines that allow IAP by using the user’s firmware.

Block Diagram

This section describes the different parts of the bootloader. Figure 1 shows the on-chip

bootloader and IAP processes.

Figure 1. Bootloader Process Description

External Host Via the

USB Protocol

Communication

On-chip

User

Application

ISP Communication

Management

IAP

User Call

Management

Flash Memory

Management

Flash

Memory

2 AT89C5131A USB Bootloader

4287C–USB–11/04

Share Link: