www.ti.com
3 MPU Subsystem .............................................................................................................. 197
3.1 MPU Subsystem Overview ............................................................................................. 198
3.1.1 Introduction ...................................................................................................... 198
3.1.2 Features .......................................................................................................... 199
3.2 MPU Subsystem Integration ............................................................................................ 200
3.2.1 MPU Subsystem Clock and Reset Distribution ............................................................. 202
3.2.1.1 Clock Distribution ......................................................................................... 202
3.2.1.2 Reset Distribution ......................................................................................... 203
3.2.2 ARM Subchip .................................................................................................... 204
3.2.2.1 ARM Overview ............................................................................................ 204
3.2.2.2 ARM Description .......................................................................................... 205
3.2.2.2.1 ARM
®
Cortex™-A8 Instruction, Data, and Private Peripheral Port ........................... 205
3.2.2.2.2 MPU Subsystem Features .......................................................................... 205
3.2.2.3 Clock, Reset, and Power Management ................................................................ 206
3.2.2.3.1 Clocks .................................................................................................. 206
3.2.2.3.2 Reset ................................................................................................... 206
3.2.2.3.3 Power Management ................................................................................. 206
3.2.3 AXI2OCP and I2Async Bridges ............................................................................... 206
3.2.3.1 Bridges Overview ......................................................................................... 206
3.2.3.2 AXI2OCP Description .................................................................................... 207
3.2.3.3 AXI Tag to OCP Thread Remapping ................................................................... 208
3.2.3.4 Clocks, Reset, and Power Management .............................................................. 208
3.2.3.4.1 Clocks .................................................................................................. 208
3.2.3.4.2 Reset ................................................................................................... 209
3.2.3.4.3 Power Management ................................................................................. 209
3.2.4 Interrupt Controller .............................................................................................. 209
3.2.4.1 Clocks ...................................................................................................... 209
3.2.4.2 Reset ....................................................................................................... 209
3.2.4.3 Power Management ...................................................................................... 209
3.3 MPU Subsystem Functional Description .............................................................................. 210
3.3.1 Interrupts ......................................................................................................... 210
3.3.2 Power Management ............................................................................................ 210
3.3.2.1 Power Domains ........................................................................................... 210
3.3.2.2 Power States .............................................................................................. 211
3.3.2.3 Power Modes .............................................................................................. 211
3.3.2.4 Transitions ................................................................................................. 215
3.4 MPU Subsystem Basic Programming Model ......................................................................... 216
3.4.1 Clock Control .................................................................................................... 216
3.4.2 MPU Power Mode Transitions ................................................................................ 216
3.4.2.1 Basic Power-On Reset ................................................................................... 216
3.4.2.2 MPU Into Standby Mode ................................................................................. 216
3.4.2.3 MPU Out of Standby Mode .............................................................................. 216
3.4.2.4 MPU Power-On from a Powered-Off State ............................................................ 216
3.4.3 NEON Power Mode Transition ................................................................................ 217
3.4.4 ARM Programming Model ..................................................................................... 217
3.5 Revision History .......................................................................................................... 218
4 Power, Reset, and Clock Management ................................................................................ 219
4.1 PRCM Introduction to Power Management ........................................................................... 220
4.1.1 Goal of Power Management ................................................................................... 220
4.1.2 Power-Management Techniques ............................................................................. 220
4.1.2.1 Dynamic Voltage and Frequency Scaling ............................................................. 220
4.1.2.2 SmartReflex Adaptive Voltage Control ................................................................. 221
4.1.2.3 Dynamic Power Switching ............................................................................... 222
4
Contents SPRUF98D–October 2009
Submit Documentation Feedback
Copyright © 2009, Texas Instruments Incorporated
4星 · 超过85%的资源 需积分: 9 40 浏览量
2011-12-12
11:31:13
上传
评论
收藏 21.83MB PDF 举报 
评论2