at91sam9g20-cu ATMEL Corporation, at91sam9g20-cu Datasheet - Page 810

• Manufacturer Part Number: at91sam9g20-cu
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

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AT91SAM9G20 Preliminary
28 Debug Unit (DBGU) .............................................................................. 339
29 Parallel Input Output Controller (PIO) ................................................ 363
30 Serial Peripheral Interface (SPI) ......................................................... 389
31 Two-wire Interface (TWI) ..................................................................... 415
27.6 Product Dependencies .....................................................................................315
27.7 Functional Description ......................................................................................316
27.8 Advanced Interrupt Controller (AIC) User Interface .........................................326
28.1 Overview ..........................................................................................................339
28.2 Block Diagram ..................................................................................................340
28.3 Product Dependencies .....................................................................................341
28.4 UART Operations .............................................................................................341
28.5 Debug Unit (DBGU) User Interface .................................................................348
29.1 Overview ..........................................................................................................363
29.2 Block Diagram ..................................................................................................364
29.3 Product Dependencies .....................................................................................365
29.4 Functional Description ......................................................................................366
29.5 I/O Lines Programming Example .....................................................................370
29.6 Parallel Input/Output Controller (PIO) User Interface .......................................372
30.1 Overview ..........................................................................................................389
30.2 Block Diagram ..................................................................................................390
30.3 Application Block Diagram ...............................................................................390
30.4 Signal Description ...........................................................................................391
30.5 Product Dependencies .....................................................................................391
30.6 Functional Description ......................................................................................392
30.7 Serial Peripheral Interface (SPI) User Interface ...............................................401
31.1 Overview ..........................................................................................................415
31.2 List of Abbreviations .........................................................................................415
31.3 Block Diagram ..................................................................................................416
31.4 Application Block Diagram ...............................................................................416
31.5 Product Dependencies .....................................................................................417
31.6 Functional Description ......................................................................................417
31.7 Master Mode ....................................................................................................419
31.8 Multi-master Mode ...........................................................................................431
31.9 Slave Mode ......................................................................................................434
31.10 Two-wire Interface (TWI) User Interface ..........................................................442
6384B–ATARM–15-Dec-08