Rainbow-electronics Atmega169L Manuel d'utilisateur télécharger pdf (Page 94)

ATmega169V/L

2514A–AVR–08/02

16-bitTimer/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 section are written in general form. A lower case

“n” replaces the Timer/Counter number, and a lower case “x” replaces the Output Com-

pare 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 39. For the

actual placement of I/O pins, refer to “Pinout ATmega169” on page 2. CPU accessible

I/O Registers, including I/O bits and I/O pins, are shown in bold. The device-specific I/O

on page 116.

1 2 ... 89 90 91 92 93 94 95 96 97 98 99 ... 316 317

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Rainbow-electronics Atmega169L Manuel d'utilisateur Page 94