AT83SND1CXXX-ROTIL datasheet(22/212 Pages) ATMEL

Il numero della parte	AT83SND1CXXX-ROTIL

Spiegazioni elettronici	Single-Chip Flash Microcontroller with MP3 Decoder and Human Interface

PDF	212 Pages

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Produttore elettronici	ATMEL [ATMEL Corporation]

Homepage	http://www.atmel.com

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22 / 212 page

4109J–8051–10/06

AT8xC51SND1C

Figure 6-7.

Hardware Boot Process Algorithm

The software process (boot loader) is detailed in the “Boot Loader Datasheet” Document.

6.6

Preventing Flash Corruption

See Section “Reset Recommendation to Prevent Flash Corruption”, page 48.

6.7

Registers

Table 22. AUXR1 Register

AUXR1 (S:A2h) – Auxiliary Register 1

Atmel’s

Boot Loader

Hard Cond?

ISP = L?

RESET

Hard Cond Init

ENBOOT = 1

PC = F000h

FCON = 00h

Prog Cond?

BLJB = P?

Standard Init

ENBOOT = 0

PC = 0000h

FCON = F0h

Prog Cond Init

ENBOOT = 1

PC = F000h

FCON = F0h

User’s

Application

7654

3210

ENBOOT

GF3

DPS

Bit

Number

Bit

Mnemonic

Description

7 - 6

Reserved

The value read from these bits are indeterminate. Do not set these bits.

ENBOOT

Enable Boot Flash

Set this bit to map the boot Flash in the code space between at addresses F000h

to FFFFh.

Clear this bit to disable boot Flash.

Reserved

The value read from this bit is indeterminate. Do not set this bit.

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