ATmega168 Atmel Corporation, ATmega168 Datasheet - Page 140
![no-image](/images/manufacturer_photos/0/0/79/atmel_corporation_sml.jpg)
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATMEGA168
Manufacturer:
AVAILINK
Quantity:
1 590
Company:
Part Number:
ATmega168-15AD
Manufacturer:
VISHAY
Quantity:
15 600
Part Number:
ATmega168-15AT1
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Company:
Part Number:
ATmega168-15MT
Manufacturer:
ATMEL
Quantity:
686
Part Number:
ATmega168-15MT
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Company:
Part Number:
ATmega168-15MT1
Manufacturer:
ATMEL
Quantity:
372
Part Number:
ATmega168-15MZ
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Part Number:
ATmega168-20AU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
18. 8-bit Timer/Counter2 with PWM and asynchronous operation
18.1
18.2
2545T–AVR–05/11
Features
Overview
•
•
•
•
•
•
•
Timer/Counter2 is a general purpose, single channel, 8-bit Timer/Counter module. A simplified
block diagram of the 8-bit Timer/Counter is shown in
I/O pins, refer to
including I/O bits and I/O pins, are shown in bold. The device-specific I/O Register and bit loca-
tions are listed in the
The PRTIM2 bit in
Timer/Counter2 module.
Figure 18-1. 8-bit timer/counter block diagram.
Single channel counter
Clear timer on compare match (auto reload)
Glitch-free, phase correct pulse width modulator (PWM)
Frequency generator
10-bit clock prescaler
Overflow and compare match interrupt sources (TOV2, OCF2A and OCF2B)
Allows clocking from external 32kHz watch crystal independent of the I/O clock
“Pinout Atmel ATmega48/88/168.” on page
“Minimizing power consumption” on page 41
“Register description” on page
Timer/counter
TCCRnA
OCRnA
TCNTn
OCRnB
=
=
Direction
Count
Clear
Control logic
TOP
=
TCCRnB
BOTTOM
Fixed
value
TOP
clk
153.
=
Tn
0
Figure
18-1. For the actual placement of
ATmega48/88/168
2. CPU accessible I/O Registers,
OCnA
(Int.req.)
OCnB
(Int.req.)
must be written to zero to enable
TOVn
(Int.req.)
Clock select
generation
generation
(From prescaler)
Waveform
Waveform
detector
Edge
OCnA
OCnB
Tn
140