atmega32u4-16mu ATMEL Corporation, atmega32u4-16mu Datasheet - Page 106

• Manufacturer Part Number: atmega32u4-16mu
• Description: Atmega32u4 8-bit Avr Microcontroller With 32k Bytes Of Isp Flash And Usb Controller
• Manufacturer: ATMEL Corporation

14. 16-bit Timers/Counters (Timer/Counter1 and Timer/Counter3)
14.1
106
Overview
ATmega32U4
The 16-bit Timer/Counter unit allows accurate program execution timing (event management),
wave generation, and signal timing measurement. The main features are:
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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, 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
placement of I/O pins, see
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
106.
The Power Reduction Timer/Counter1 bit, PRTIM1, in
page 43
The Power Reduction Timer/Counter3 bit, PRTIM3, in
page 44
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
Ten independent interrupt sources (TOV1, OCF1A, OCF1B, OCF1C, ICF1, TOV3, OCF3A, OCF3B,
OCF3C and ICF3)
must be written to zero to enable Timer/Counter1 module.
must be written to zero to enable Timer/Counter3 module.
“16-bit Timers/Counters (Timer/Counter1 and Timer/Counter3)” on page
“Pinout ATmega32U4” on page
“Power Reduction Register 0 - PRR0” on
“Power Reduction Register 1 - PRR1” on
3. CPU accessible I/O Registers,
Figure
14-1. For the actual
7766A–AVR–03/08