PIC16C711-04I/P【PDF 19/177 页】IC MCU OTP 1KX14 A/D 18DIP

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7593L–AVR–09/12

AT90USB64/128

15. 16-bit Timer/Counter (Timer/Counter1 and Timer/Counter3)

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

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

True 16-bit design (that is, 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

Ten independent interrupt sources (TOV1, OCF1A, OCF1B, OCF1C, ICF1, TOV3, OCF3A, OCF3B,

OCF3C, and ICF3)

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, 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, that is, 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 on page 116. For

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 the “16-bit Timer/Counter (Timer/Counter1 and

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

page 54 must be written to zero to enable Timer/Counter1 module.

The Power Reduction Timer/Counter3 bit, PRTIM3, in “PRR1 – Power Reduction Register 1” on

page 55 must be written to zero to enable Timer/Counter3 module.

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