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4.1.1 Introduction ...................................................................................................... 676
4.1.2 Features .......................................................................................................... 676
4.2 MPU Subsystem Integration ............................................................................................ 678
4.2.1 MPU Subsystem Clock and Reset Distribution ............................................................. 679
4.2.1.1 Clock Distribution ......................................................................................... 679
4.2.1.2 Reset Distribution ......................................................................................... 680
4.2.2 ARM Subchip .................................................................................................... 682
4.2.2.1 ARM Overview ............................................................................................ 682
4.2.2.2 ARM Description .......................................................................................... 682
4.2.2.2.1 ARM Cortex-A8 Instruction, Data, and Private Peripheral Port ................................ 682
4.2.2.2.2 MPU Subsystem Features .......................................................................... 682
4.2.2.3 Clock, Reset, and Power Management ................................................................ 683
4.2.2.3.1 Clocks .................................................................................................. 683
4.2.2.3.2 Reset ................................................................................................... 683
4.2.2.3.3 Power Management ................................................................................. 683
4.2.3 Local Interconnect .............................................................................................. 683
4.2.3.1 Description ................................................................................................. 683
4.2.3.2 Clocks, Reset, and Power Management .............................................................. 683
4.2.3.2.1 Clocks .................................................................................................. 683
4.2.3.2.2 Reset ................................................................................................... 683
4.2.3.2.3 Power Management ................................................................................. 684
4.2.4 Interrupt Controller .............................................................................................. 684
4.2.4.1 Clocks ...................................................................................................... 684
4.2.4.2 Reset ....................................................................................................... 684
4.2.4.3 Power Management ...................................................................................... 684
4.3 MPU Subsystem Functional Description .............................................................................. 685
4.3.1 Interrupts ......................................................................................................... 685
4.3.2 Power Management ............................................................................................ 685
4.3.2.1 Power Domains ........................................................................................... 685
4.3.2.2 Power States .............................................................................................. 686
4.3.2.3 Power Modes .............................................................................................. 686
4.3.2.4 Transitions ................................................................................................. 688
4.4 MPU Subsystem Basic Programming Model ......................................................................... 690
4.4.1 MPU Subsystem Initialization Sequence .................................................................... 690
4.4.2 Clock Control .................................................................................................... 690
4.4.3 MPU Power Mode Transitions ................................................................................ 690
4.4.3.1 Basic Power-On Reset ................................................................................... 690
4.4.3.2 MPU Into Standby Mode ................................................................................. 690
4.4.3.3 MPU Out of Standby Mode .............................................................................. 691
4.4.3.4 MPU Power-On From a Powered-Off State ........................................................... 691
4.4.4 ARM Programming Model ..................................................................................... 691
5 IVA2.2 Subsystem ............................................................................................................ 693
5.1 IVA2.2 Subsystem Overview ........................................................................................... 694
5.1.1 IVA2.2 Subsystem Key Features ............................................................................. 694
5.2 IVA2.2 Subsystem Integration .......................................................................................... 696
5.2.1 Clocking, Reset, and Power-Management Scheme ........................................................ 697
5.2.1.1 Clocks ...................................................................................................... 697
5.2.1.1.1 IVA2.2 Clocks ......................................................................................... 697
5.2.1.2 Resets ...................................................................................................... 697
5.2.1.2.1 Hardware Resets ..................................................................................... 697
5.2.1.2.2 Software Resets ...................................................................................... 699
5.2.1.3 Power Domain ............................................................................................ 699
5.2.2 Hardware Requests ............................................................................................. 701
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SWPU177N–December 2009–Revised November 2010 Contents
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