ATmega168 Atmel Corporation, ATmega168 Datasheet - Page 287
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ATmega168
Manufacturer Part Number
ATmega168
Description
Manufacturer
Atmel Corporation
Specifications of ATmega168
Flash (kbytes)
16 Kbytes
Pin Count
32
Max. Operating Frequency
20 MHz
Cpu
8-bit AVR
# Of Touch Channels
16
Hardware Qtouch Acquisition
No
Max I/o Pins
23
Ext Interrupts
24
Usb Speed
No
Usb Interface
No
Spi
2
Twi (i2c)
1
Uart
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
15
Analog Comparators
1
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
1
Eeprom (bytes)
512
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
1.8 to 5.5
Operating Voltage (vcc)
1.8 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
3
Output Compare Channels
6
Input Capture Channels
1
Pwm Channels
6
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
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2545T–AVR–05/11
Table 28-5.
Note:
Table 28-6.
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)
(1)
for details.
(4)
(4)
(4)
Extended fuse byte for mega88/168.
Fuse high byte.
“Alternate functions of port C” on page 81
“WDTCSR – Watchdog timer control register” on page 53
Table 29-4 on page 307
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 27-9 on page 282
Table 27-9 on page 282
Table 27-6 on page 281
Table 27-6 on page 281
for description of RSTDISBL fuse.
ATmega48/88/168
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 28-11 on page 290
(1)
(1)
287