ATmega32HVB datasheet(195/273 Pages) ATMEL

номер детали	ATmega32HVB

подробное описание детали	8-bit Microcontroller with 16K/32K Bytes In-System Programmable Flash

PDF	273 Pages

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производитель	ATMEL [ATMEL Corporation]

домашняя страница	http://www.atmel.com

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195 / 273 page

195

8042A–AVR–07/09

ATmega16HVB/32HVB

29.6

Entering the Boot Loader Program

Entering the Boot Loader takes place by a jump or call from the application program. This may

be initiated by a trigger such as a command received via the TWI interface. Alternatively, the

Boot Reset Fuse can be programmed so that the Reset Vector is pointing to the Boot Flash start

address after a reset. In this case, the Boot Loader is started after a reset. After the application

code is loaded, the program can start executing the application code. Note that the fuses cannot

be changed by the MCU itself. This means that once the Boot Reset Fuse is programmed, the

Reset Vector will always point to the Boot Loader Reset and the fuse can only be changed

through the serial or parallel programming interface.

Note:

1. “1” means unprogrammed, “0” means programmed

Table 29-2.

Boot Reset Fuse

(1)

BOOTRST

Reset Address

Reset Vector = Application Reset (address 0x0000)

Reset Vector = Boot Loader Reset (see Table 29-5 on page 204)

ATmega32HVB датащи(PDF) 195 Page - ATMEL Corporation