Datasheet

20. 16-bit Timer/Counter1 (TC1) with PWM
20.1 Overview
The 16-bit timer/counter unit allows accurate program execution timing (event management), wave
generation, and signal timing measurement.
A block diagram of the 16-bit timer/counter is shown below. CPU accessible I/O registers, including I/O
bits and I/O pins, are shown in bold. The device-specific I/O register and bit locations are listed in 20.15
Register Description. For the actual placement of I/O pins, refer to the Pin Configurations description.
Related Links
18. I/O-Ports
20.2 Features
• True 16-bit Design (i.e., allows 16-bit PWM)
• Two Independent Output Compare Units
• Double Buffered Output Compare Registers
• One Input Capture Unit
• Input Capture Noise Canceler
• Clear Timer on Compare Match (Auto Reload)
• Glitch-free, Phase Correct Pulse-Width Modulator (PWM)
• Variable PWM Period
• Frequency Generator
• External Event Counter
• Independent Interrupt Sources (TOV, OCFA, OCFB, and ICF)
20.3 Block Diagram
The Power Reduction TC1 bit in the Power Reduction Register (PRRPRR.PRTIM1) must be written to
zero to enable the TC1 module.
ATmega48PA/88PA/168PA
16-bit Timer/Counter1 (TC1) with PWM
© 2018 Microchip Technology Inc.
Datasheet Complete
DS40002011A-page 161