Datasheet

iii
7766F–AVR–11/10
ATmega16/32U4
13.88-bit Timer/Counter Register Description ............................................................102
14 16-bit Timers/Counters (Timer/Counter1 and Timer/Counter3) ....... 108
14.1Overview .............................................................................................................108
14.2Accessing 16-bit Registers ..................................................................................110
14.3Timer/Counter Clock Sources .............................................................................113
14.4Counter Unit ........................................................................................................114
14.5Input Capture Unit ...............................................................................................115
14.6Output Compare Units .........................................................................................117
14.7Compare Match Output Unit ................................................................................119
14.8Modes of Operation .............................................................................................120
14.9Timer/Counter Timing Diagrams .........................................................................127
14.1016-bit Timer/Counter Register Description ........................................................129
15 10-bit High Speed Timer/Counter4 ..................................................... 138
15.1Features ..............................................................................................................138
15.2Overview .............................................................................................................138
15.3Counter Unit ........................................................................................................142
15.4Output Compare Unit ..........................................................................................143
15.5Dead Time Generator ..........................................................................................145
15.6Compare Match Output Unit ................................................................................146
15.7Synchronous update ...........................................................................................149
15.8Modes of Operation .............................................................................................149
15.9Timer/Counter Timing Diagrams .........................................................................156
15.10Fault Protection Unit ..........................................................................................157
15.11Accessing 10-Bit Registers ...............................................................................159
15.12Register Description ..........................................................................................162
16 Output Compare Modulator (OCM1C0A) ........................................... 175
16.1Overview .............................................................................................................175
16.2Description ..........................................................................................................175
17 Serial Peripheral Interface – SPI ......................................................... 177
17.1SS Pin Functionality ............................................................................................181
17.2Data Modes .........................................................................................................184
18 USART ................................................................................................... 186
18.1Overview .............................................................................................................186
18.2Clock Generation .................................................................................................187