SAM7S256_14 Datasheet, PDF (771/775 Pages) ATMEL Corporation – ARM-based Flash MCU

25.3Processor Clock Controller ..................................................................................191
25.4USB Clock Controller ...........................................................................................192
25.5Peripheral Clock Controller ..................................................................................192
25.6Programmable Clock Output Controller ...............................................................192
25.7Programming Sequence ......................................................................................193
25.8Clock Switching Details .......................................................................................197
25.9Power Management Controller (PMC) User Interface ........................................200
26 Debug Unit (DBGU) .............................................................................. 215
26.1Overview ..............................................................................................................215
26.2Block Diagram .....................................................................................................216
26.3Product Dependencies ........................................................................................217
26.4UART Operations ................................................................................................217
26.5Debug Unit (DBGU) User Interface ....................................................................224
27 Parallel Input/Output Controller (PIO) ................................................ 239
27.1Overview ..............................................................................................................239
27.2Block Diagram .....................................................................................................240
27.3Product Dependencies ........................................................................................241
27.4Functional Description .........................................................................................242
27.5I/O Lines Programming Example .........................................................................246
27.6Programmable Multibit ECC Error Location (PIO) User Interface .......................248
28 Serial Peripheral Interface (SPI) .......................................................... 269
28.1Overview ..............................................................................................................269
28.2Block Diagram .....................................................................................................269
28.3Application Block Diagram ...................................................................................270
28.4Signal Description ...............................................................................................270
28.5Product Dependencies ........................................................................................270
28.6Functional Description .........................................................................................272
28.7Serial Peripheral Interface (SPI) User Interface User Interface ...........................281
29 Two-wire Interface (TWI) SAM7S512/256/128/64/321/32 .................... 295
29.1Overview ..............................................................................................................295
29.2List of Abbreviations ............................................................................................295
29.3Block Diagram .....................................................................................................296
29.4Application Block Diagram ...................................................................................296
29.5Product Dependencies ........................................................................................296
29.6Functional Description .........................................................................................297
SAM7S Series [DATASHEET]
6175M–ATARM–26-Oct-12
771