Rainbow-electronics ATmega64L Manual do Utilizador descarregar pdf (Página 83)

ATmega16(L)

2466B–09/01

16-bit

Timer/Counter1

The 16-bit Timer/Counter unit allows accurate program execution timing (event man-

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

•

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

• Four Independent Interrupt Sources (TOV1, OCF1A, OCF1B, and ICF1)

Overview Most register and bit references in this document 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 (i.e., TCNT1 for accessing Timer/Counter1 counter value

and so on). The physical I/O register and bit locations for ATmega16 are listed in the

“16-bit Timer/Counter Register Description” on page 104.

A simplified block diagram of the 16-bit Timer/Counter is shown in Figure 40. CPU

accessible I/O registers, including I/O bits and I/O pins, are shown in bold.

1 2 ... 78 79 80 81 82 83 84 85 86 87 88 ... 297 298

Sem comentários

Rainbow-electronics ATmega64L Manual do Utilizador Página 83