ATMEGA16U2-16AU Atmel, ATMEGA16U2-16AU Datasheet - Page 231
ATMEGA16U2-16AU
Manufacturer Part Number
ATMEGA16U2-16AU
Description
8-bit Microcontrollers - MCU 16K Flash
Manufacturer
Atmel
Datasheet
1.ATMEGA16U2-16AU.pdf
(310 pages)
Specifications of ATMEGA16U2-16AU
Product Category
8-bit Microcontrollers - MCU
Rohs
yes
Core
AVR
Data Bus Width
8 bit
Program Memory Size
16 KB
Data Ram Size
1.25 KB
Data Rom Size
512 B
Program Memory Type
Flash
Factory Pack Quantity
1250
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23.6.3
7799D–AVR–11/10
External Hardware conditions
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.
Table 23-4.
Note:
The Hardware Boot Enable Fuse (HWBE) can be programmed (See
special hardware conditions under reset, the bootloader execution is forced after reset.
Table 23-5.
Note:
When the HWBE fuse is enable the
pled during reset rising edge. When
will be set as the Boot Loader Reset address and the Boot Loader will be executed (See Figures
23-3).
BOOTRST
HWBE
1
0
1
0
1. “1” means unprogrammed, “0” means programmed
1. “1” means unprogrammed, “0” means programmed
Boot Reset Fuse
Hardware Boot Enable Fuse
Reset Address
Reset Vector = Application Reset (address 0x0000)
Reset Vector = Boot Loader Reset (see
Reset Address
PD7/HWB pin can not be used to force Boot Loader execution after reset
PD7/HWB pin is used during reset to force bootloader execution after reset
(1)
PD7
PD7
/HWB pin is ‘0’ during reset rising edge, the reset vector
/HWB pin is configured as input during reset and sam-
(1)
ATmega8U2/16U2/32U2
Table 23-8 on page
Table
239)
23-5) so that upon
231
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