ATA6613 ATMEL Corporation, ATA6613 Datasheet - Page 162

• Manufacturer Part Number: ATA6613
• Description: Ata6613
• Manufacturer: ATMEL Corporation

6.15
6.15.1
Figure 6-53. 8-bit Timer/Counter Block Diagram
162
8-bit Timer/Counter2 with PWM and Asynchronous Operation
ATA6612/ATA6613
Overview
Timer/Counter2 is a general purpose, single channel, 8-bit Timer/Counter module. The main
features are:
•
•
•
•
•
•
•
A simplified block diagram of the 8-bit Timer/Counter is shown in
cific I/O Register and bit locations are listed in the
page
The PRTIM2 bit in
enable Timer/Counter2 module.
Timer/Counter
TCCRnA
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
OCRnA
TCNTn
OCRnB
=
=
174.
Direction
Count
Clear
“Power Reduction Register - PRR” on page 66
Control Logic
TOP
=
TCCRnB
BOTTOM
Fixed
Value
TOP
clk
= 0
TN
Prescaler
(Int.Req.)
(Int.Req.)
OCnB
OCnA
Generation
Generation
Waveform
Waveform
“8-bit Timer/Counter Register Description” on
TOVn
(Int.Req.)
OCnA
OCnB
Oscillator
T/C
Figure
clk
must be written to zero to
I/O
6-53. The device-spe-
TOSC1
TOSC2
9111C–AUTO–02/08