Datasheet

v
32142D–06/2013
ATUC64/128/256L3/4U
20 Universal Synchronous Asynchronous Receiver Transmitter (USART)
434
20.1 Features ........................................................................................................434
20.2 Overview ........................................................................................................434
20.3 Block Diagram ...............................................................................................435
20.4 I/O Lines Description ....................................................................................436
20.5 Product Dependencies ..................................................................................436
20.6 Functional Description ...................................................................................437
20.7 User Interface ................................................................................................463
20.8 Module Configuration ....................................................................................485
21 Serial Peripheral Interface (SPI) ......................................................... 486
21.1 Features ........................................................................................................486
21.2 Overview ........................................................................................................486
21.3 Block Diagram ...............................................................................................487
21.4 Application Block Diagram .............................................................................487
21.5 I/O Lines Description .....................................................................................488
21.6 Product Dependencies ..................................................................................488
21.7 Functional Description ...................................................................................488
21.8 User Interface ................................................................................................499
21.9 Module Configuration ....................................................................................526
22 Two-wire Master Interface (TWIM) ...................................................... 527
22.1 Features ........................................................................................................527
22.2 Overview ........................................................................................................527
22.3 List of Abbreviations ......................................................................................528
22.4 Block Diagram ...............................................................................................528
22.5 Application Block Diagram .............................................................................529
22.6 I/O Lines Description .....................................................................................529
22.7 Product Dependencies ..................................................................................529
22.8 Functional Description ...................................................................................531
22.9 User Interface ................................................................................................543
22.10 Module Configuration ....................................................................................560
23 Two-wire Slave Interface (TWIS) ......................................................... 561
23.1 Features ........................................................................................................561
23.2 Overview ........................................................................................................561
23.3 List of Abbreviations ......................................................................................562