A000046 Arduino, A000046 Datasheet - Page 144

• Manufacturer Part Number: A000046
• Description: MCU, MPU & DSP Development Tools Uno
• Manufacturer: Arduino
• Series: -r
• Type: MCUr

Specifications of A000046

• Processor To Be Evaluated: ATmega328
• Interface Type: USB, I2C, SPI
• Dimensions: 2.7 in x 2.1 in
• Operating Supply Voltage: 5 V
• Contents: Board
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: ATmega328

17. 8-bit Timer/Counter2 with PWM and Asynchronous Operation
17.1
17.2
8161D–AVR–10/09
Features
Overview
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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
isters, including I/O bits and I/O pins, are shown in bold. The device-specific I/O Register and bit
locations are listed in the
The PRTIM2 bit in
enable Timer/Counter2 module.
Figure 17-1. 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 32 kHz Watch Crystal Independent of the I/O Clock
”Pinout ATmega48PA/88PA/168PA/328P” on page
”Minimizing Power Consumption” on page 42
Timer/Counter
TCCRnA
OCRnA
TCNTn
OCRnB
”Register Description” on page
=
=
Direction
ATmega48PA/88PA/168PA/328P
Count
Clear
Control Logic
TOP
=
TCCRnB
Value
BOTTOM
Fixed
TOP
clk
=
Tn
0
Figure
158.
17-1. For the actual placement of
OCnA
(Int.Req.)
OCnB
(Int.Req.)
TOVn
(Int.Req.)
Clock Select
Generation
Generation
Waveform
Waveform
( From Prescaler )
Detector
Edge
2. CPU accessible I/O Reg-
must be written to zero to
OCnA
OCnB
Tn
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