Rainbow Electronics ATtiny861_V - Manual (Page 91)

91
2588B–AVR–11/06
ATtiny261/461/861
16. Timer/Counter1
16.1 Features
• 10/8-Bit Accuracy
• Three Independent Output Compare Units
• Clear Timer on Compare Match (Auto Reload)
• Glitch Free, Phase and Frequency Correct Pulse Width Modulator (PWM)
• Variable PWM Period
• Independent Dead Time Generators for each PWM channels
• Five Independent Interrupt Sources (TOV1, OCF1A, OCD1B, OCF1D, FPF1)
• High Speed Asynchronous and Synchronous Clocking Modes
• Separate Prescaler Unit
16.2 Overview
Timer/Counter1 is a general purpose high speed Timer/Counter module, with three independent
Output Compare Units, and with PWM support.
The Timer/Counter1 features a high resolution and a high accuracy usage with the lower pres-
caling opportunities. It can also support three accurate and high speed Pulse Width Modulators
using clock speeds up to 64 MHz. In PWM mode Timer/Counter1 and the output compare regis-
ters serve as triple stand-alone PWMs with non-overlapping non-inverted and inverted outputs.
Similarly, the high prescaling opportunities make this unit useful for lower speed functions or
exact timing functions with infrequent actions. A simplified block diagram of the Timer/Counter1
i s s h o w n i n
F i g u r e 1 6 - 1 . F o r a c t u a l p l a c e m e n t o f t h e I / O p i n s , r e f e r t o ” P i n o u t
ATtiny261/461/861” on page 2 . The device-specific I/O register and bit locations are listed in the
”Register Description” on page 113 .