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PDF AT89C51SND1 Data sheet ( Hoja de datos )
| Número de pieza | AT89C51SND1 | |
| Descripción | USB Microcontrollers | |
| Fabricantes | ATMEL Corporation | |
| Logotipo |  |
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Features
• Protocol
– USB Used as a Physical Layer
– Device Firmware Upgrade Class Compliant
– Auto-Frequency Detection
• In-System Programming
– Read/Write Flash Memory
– 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 Memory
– Read Device ID
– Block Erase
– Read/Write Configuration Bytes
– Bootloader Start
Description
This document describes the USB bootloader functionalities as well as the USB proto-
col to efficiently perform operations on the on-chip Flash memory. Additional
information on the AT89C51SND1 product can be found in the AT89C51SND1
datasheet and the AT89C51SND1 errata sheet available on the Atmel web site.
The bootloader software (binary file) currently used for production is available from the
Atmel web site.
USB
Microcontrollers
AT89C51SND1
USB Bootloader
Bootloader Revision
Revisions 1.6.2 and higher
Purpose of Modifications
First release
Date
3/25/2003
4254C–MP3–03/06
1 page  
Software Boot
Vector
AT89C51SND1
The Software Boot Vector (SBV see Table 6) forces the execution of a user bootloader starting
at address [SBV]00h in the application area (FM0).
The way to start this user bootloader is described in Section “Bootloader Configuration”.
Application
User Bootloader
[SBV]00h
USB Bootloader
FM1
FLIP Software
Program
FM0
FLIP is a PC software program running under Windows® 9x/Me/2000/XP and LINUX® that sup-
ports all Atmel Flash microcontrollers and USB protocol communication media.
This free software program is available from the Atmel web site.
4254C–MP3–03/06
5
5 Page 
Figure 4. 48 MHz Frequency Auto-generation
AT89C51SND1
MAIN
No Resume
Detected?
Yes
No USB Connected?
Suspend/Resume
Yes
Configure PLL for
Frequency X
Configure Timer 0
Yes SOF Detected?
No
Timer 0 Overflow?
No
Yes
Change Frequency
USB Scheduler
4254C–MP3–03/06
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet AT89C51SND1.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| AT89C51SND1 | MP3 Microcontrollers | ATMEL Corporation |
| AT89C51SND1 | USB Microcontrollers | ATMEL Corporation |
| AT89C51SND1C | Single-Chip Flash Microcontroller | ATMEL Corporation |
| AT89C51SND1C | Single-Chip Flash Microcontroller | ATMEL Corporation |
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