Datasheet

v
6120F–ATARM–03-Oct-06
AT91SAM7X512/256/128 Preliminary
25.3 Processor Clock Controller .................................................................................180
25.4 USB Clock Controller .........................................................................................180
25.5 Peripheral Clock Controller ................................................................................180
25.6 Programmable Clock Output Controller ..............................................................181
25.7 Programming Sequence .....................................................................................181
25.8 Clock Switching Details ......................................................................................185
25.9 Power Management Controller (PMC) User Interface .......................................188
26 Debug Unit (DBGU) .............................................................................. 203
26.1 Overview ............................................................................................................203
26.2 Block Diagram ....................................................................................................204
26.3 Product Dependencies .......................................................................................205
26.4 UART Operations ...............................................................................................205
26.5 Debug Unit User Interface .................................................................................213
27 Parallel Input/Output Controller (PIO) ................................................ 227
27.1 Overview ............................................................................................................227
27.2 Block Diagram ....................................................................................................228
27.3 Application Block Diagram .................................................................................228
27.4 Product Dependencies .......................................................................................229
27.5 Functional Description ........................................................................................230
27.6 I/O Lines Programming Example .......................................................................235
27.7 Parallel Input/Output Controller (PIO) User Interface .........................................236
28 Serial Peripheral Interface (SPI) ......................................................... 253
28.1 Overview ............................................................................................................253
28.2 Block Diagram ....................................................................................................254
28.3 Application Block Diagram .................................................................................254
28.4 Signal Description .............................................................................................255
28.5 Product Dependencies .......................................................................................255
28.6 Functional Description ........................................................................................256
28.7 Serial Peripheral Interface (SPI) User Interface .................................................265
29 Two-wire Interface (TWI) ..................................................................... 279
29.1 Overview ............................................................................................................279
29.2 Block Diagram ....................................................................................................279
29.3 Application Block Diagram .................................................................................279
29.4 Product Dependencies .......................................................................................280
29.5 Functional Description ........................................................................................281