ATMEGA48V_06 ATMEL [ATMEL Corporation], ATMEGA48V_06 Datasheet - Page 140
ATMEGA48V_06
Manufacturer Part Number
ATMEGA48V_06
Description
8-bit Microcontroller with 8K Bytes In-System Programmable Flash
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.ATMEGA48V_06.pdf
(374 pages)
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16. 8-bit Timer/Counter2 with PWM and Asynchronous Operation
16.1
16.2
140
Features
Overview
ATmega48/88/168
•
•
•
•
•
•
•
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
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 16-1. 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
”Register Description” on page
”Pinout ATmega48/88/168” on page
”Minimizing Power Consumption” on page 41
Timer/Counter
TCCRnA
OCRnA
TCNTn
OCRnB
=
=
Direction
Count
Clear
Control Logic
TOP
153.
=
TCCRnB
Value
BOTTOM
Fixed
TOP
clk
=
Tn
2. CPU accessible I/O Registers, including
0
Figure
16-1. For the actual placement of
OCnA
(Int.Req.)
OCnB
(Int.Req.)
TOVn
(Int.Req.)
Clock Select
Generation
Generation
( From Prescaler )
Waveform
Waveform
Detector
Edge
must be written to zero to
OCnA
OCnB
2545J–AVR–12/06
Tn
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