ATMEGA16U2-16AU Atmel, ATMEGA16U2-16AU Datasheet - Page 248

• Manufacturer Part Number: ATMEGA16U2-16AU
• Description: 8-bit Microcontrollers - MCU 16K Flash
• Manufacturer: Atmel

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

7799D–AVR–11/10
Table 25-4.
Note:
Table 25-5.
Note:
The status of the Fuse bits is not affected by Chip Erase. Note that the Fuse bits are locked if
Lock bit1 (LB1) is programmed. Program the Fuse bits before programming the Lock bits.
Fuse High Byte
DWEN
RSTDSBL
SPIEN
WDTON
EESAVE
BOOTSZ1
BOOTSZ0
BOOTRST
Fuse Low Byte
CKDIV8
CKOUT
SUT1
SUT0
CKSEL3
CKSEL2
CKSEL1
CKSEL0
(1)
(4)
1. The SPIEN Fuse is not accessible in serial programming mode.
2. The default value of BOOTSZ1..0 results in maximum Boot Size. See
3. See
4. Never ship a product with the DWEN Fuse programmed regardless of the setting of Lock bits
1. The default value of SUT1..0 results in maximum start-up time for the default clock source.
2. The default setting of CKSEL3..0 results in External crystal Oscillator 8MHz. See
3. The CKOUT Fuse allow the system clock to be output on PORTC7. See
4. See
(3)
(4)
(3)
for details.
and RSTDSBL Fuse. A programmed DWEN Fuse enables some parts of the clock system to
be running in all sleep modes. This may increase the power consumption.
See
page 29
on page 35
Fuse High Byte
Fuse Low Byte
“WDTCSR – Watchdog Timer Control Register” on page 56
“System and Reset Characteristics” on page 267
“System Clock Prescaler” on page 35
for details.
Bit No
for details.
7
6
5
4
3
2
1
0
Bit No
7
6
5
4
3
2
1
0
Description
Enable debugWIRE (and disable
Reset capability
Disable Reset (pin can be used as
general purpose I/O)
Enable Serial Program and Data
Downloading
Watchdog Timer always ON
EEPROM memory is preserved
through the Chip Erase
Select Boot Size (see
details)
Select Boot Size (see
details)
Select Bootloader Address as Reset
Vector
Description
Divide clock by 8
Clock output
Select start-up time
Select start-up time
Select Clock source
Select Clock source
Select Clock source
Select Clock source
for details.
Table 25-9
Table 25-9
ATmega8U2/16U2/32U2
for details.
for
for
Default Value : 0xD9
1 (unprogrammed, debugWIRE
disabled)
1 (unprogrammed, Reset
enabled)
0 (programmed, SPI prog.
enabled)
1 (unprogrammed)
1 (unprogrammed, EEPROM
not preserved)
0 (programmed)
0 (programmed)
1 (unprogrammed, Reset
vector @0x0000)
Default Value : 0x5E
0 (programmed)
1 (unprogrammed)
0 (programmed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
0 (programmed)
for details.
Table 23-8 on page 239
“Clock Output Buffer”
(2)
(2)
(1)
(2)
(3)
(1)
(2)
(2)
(2)
Table 8-1 on
248