14.8 8-bit Timer/Counter Register Description ..........................................................100
15 16-bit Timer/Counter 1 with PWM ....................................................... 107
15.1 Overview ............................................................................................................107
15.2 Accessing 16-bit Registers ................................................................................109
15.3 Timer/Counter Clock Sources ...........................................................................112
15.4 Counter Unit ......................................................................................................113
15.5 Input Capture Unit .............................................................................................114
15.6 Output Compare Units .......................................................................................116
15.7 Compare Match Output Unit ..............................................................................118
15.8 Modes of Operation ...........................................................................................119
15.9 Timer/Counter Timing Diagrams .......................................................................126
15.10 16-bit Timer/Counter Register Description ......................................................128
16 Serial Peripheral Interface – SPI ......................................................... 137
16.1 SS Pin Functionality ..........................................................................................141
16.2 Data Modes .......................................................................................................144
17 USART ................................................................................................... 146
17.1 Overview ............................................................................................................146
17.2 Clock Generation ...............................................................................................147
17.3 Frame Formats ..................................................................................................150
17.4 USART Initialization ...........................................................................................152
17.5 Data Transmission – The USART Transmitter ..................................................153
17.6 Data Reception – The USART Receiver ...........................................................155
17.7 Asynchronous Data Reception ..........................................................................159
17.8 Multi-processor Communication Mode ..............................................................162
17.9 Hardware Flow Control ......................................................................................163
17.10 USART Register Description ...........................................................................165
17.11 Examples of Baud Rate Setting .......................................................................169
18 USART in SPI Mode ............................................................................. 173
18.1 Overview ............................................................................................................173
18.2 Clock Generation ...............................................................................................174
18.3 SPI Data Modes and Timing ..............................................................................175
18.4 Frame Formats ..................................................................................................175
18.5 Data Transfer .....................................................................................................177
18.6 USART MSPIM Register Description ................................................................179
18.7 AVR USART MSPIM vs.
3
AT90USB82/162
7707D–AVR–07/08
ATMEL [ ATMEL ]
