atmega32u4-16mu ATMEL Corporation, atmega32u4-16mu Datasheet - Page 425

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

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9
10 I/O-Ports .................................................................................................. 63
11 External Interrupts ................................................................................. 83
12 Timer/Counter0, Timer/Counter1, and Timer/Counter3 Prescalers ... 87
13 8-bit Timer/Counter0 with PWM ............................................................ 89
14 16-bit Timers/Counters (Timer/Counter1 and Timer/Counter3) ....... 106
7766A–AVR–03/08
System Control and Reset .................................................................... 47
Interrupts ................................................................................................ 59
7.4 Power-save Mode ...................................................................................................42
7.5 Standby Mode ........................................................................................................43
7.6 Extended Standby Mode ........................................................................................43
7.7 Power Reduction Register ......................................................................................43
7.8 Minimizing Power Consumption .............................................................................45
8.1 Internal Voltage Reference .....................................................................................53
8.2 Watchdog Timer .....................................................................................................53
9.1 Interrupt Vectors in ATmega32U4 ..........................................................................59
10.1 Introduction ...........................................................................................................63
10.2 Ports as General Digital I/O ..................................................................................64
10.3 Alternate Port Functions .......................................................................................68
10.4 Register Description for I/O-Ports .........................................................................80
12.1 Internal Clock Source ...........................................................................................87
12.2 Prescaler Reset ....................................................................................................87
12.3 External Clock Source ..........................................................................................87
12.4 General Timer/Counter Control Register – GTCCR .............................................88
13.1 Overview ...............................................................................................................89
13.2 Timer/Counter Clock Sources ..............................................................................90
13.3 Counter Unit .........................................................................................................90
13.4 Output Compare Unit ............................................................................................91
13.5 Compare Match Output Unit .................................................................................93
13.6 Modes of Operation ..............................................................................................94
13.7 Timer/Counter Timing Diagrams ..........................................................................98
13.8 8-bit Timer/Counter Register Description .............................................................99
14.1 Overview .............................................................................................................106
14.2 Accessing 16-bit Registers .................................................................................108
14.3 Timer/Counter Clock Sources ............................................................................111
ATmega32U4
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