ATMEGA168-20AI Atmel, ATMEGA168-20AI Datasheet - Page 286
ATMEGA168-20AI
Manufacturer Part Number
ATMEGA168-20AI
Description
IC AVR MCU 16K 20MHZ 32TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA168-20AI
Core Processor
AVR
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
23
Program Memory Size
16KB (8K x 16)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
32-TQFP, 32-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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Manufacturer
Quantity
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ATmega48/88/168
Table 27-5.
Note:
Table 27-6.
Notes:
Extended Fuse Byte
–
–
–
–
–
BOOTSZ1
BOOTSZ0
BOOTRST
High Fuse Byte
RSTDISBL
DWEN
SPIEN
WDTON
EESAVE
BODLEVEL2
BODLEVEL1
BODLEVEL0
(2)
1. The default value of BOOTSZ1..0 results in maximum Boot Size. See
1. See
2. The SPIEN Fuse is not accessible in serial programming mode.
3. See
4. See
(3)
289
(1)
(4)
(4)
(4)
Extended Fuse Byte for mega88/168
Fuse High Byte
for details.
“Alternate Functions of Port C” on page 80
“WDTCSR – Watchdog Timer Control Register” on page 52
Table 28-4 on page 306
Bit No
Bit No
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
for BODLEVEL Fuse decoding.
Description
–
–
–
–
–
Select Boot Size
(see
and
for details)
Select Boot Size
(see
and
for details)
Select Reset Vector
Description
External Reset Disable
debugWIRE Enable
Enable Serial Program and
Data Downloading
Watchdog Timer Always On
EEPROM memory is
preserved through the Chip
Erase
Brown-out Detector trigger
level
Brown-out Detector trigger
level
Brown-out Detector trigger
level
Table 26-9 on page 281
Table 26-9 on page 281
Table 26-6 on page 280
Table 26-6 on page 280
for description of RSTDISBL Fuse.
Default Value
1
1
1
1
1
0 (programmed)
0 (programmed)
1 (unprogrammed)
Default Value
1 (unprogrammed)
1 (unprogrammed)
0 (programmed, SPI
programming enabled)
1 (unprogrammed)
1 (unprogrammed), EEPROM
not reserved
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
for details.
Table 27-11 on page
2545S–AVR–07/10
(1)
(1)
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