DOC7707 datasheet(107/307 Pages) ETC1

107 / 307 page

107

7707F–AVR–11/10

AT90USB82/162

15. 16-bit Timer/Counter 1 with PWM

The 16-bit Timer/Counter 1 unit allows accurate program execution timing (event management),

wave generation, and signal timing measurement. The main features are:

• True 16-bit Design (i.e., Allows 16-bit PWM)

• Three 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

• Five independent interrupt sources (TOV1, OCF1A, OCF1B, OCF1C, ICF1)

15.1

Overview

Most register and bit references in this section are written in general form. A lower case “n”

replaces the Timer/Counter number (for this product, only n=1 is available), and a lower case “x”

replaces the Output Compare unit channel. However, when using the register or bit defines in a

program, the precise form must be used, i.e., TCNT1 for accessing Timer/Counter1 counter

value and so on.

A simplified block diagram of the 16-bit Timer/Counter is shown in Figure 15-1. For the actual

placement of I/O pins, see “Pinout AT90USB82/162” on page 3. 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 loca-

tions are listed in the “16-bit Timer/Counter 1 with PWM” on page 107.

The Power Reduction Timer/Counter1 bit, PRTIM1, in “Power Reduction Register 0 - PRR0” on

page 43 must be written to zero to enable Timer/Counter1 module.

DOC7707 Datasheet(PDF) 107 Page - List of Unclassifed Manufacturers