Voltage processor:
interrupt clear
SmartReflex module:
error
SmartReflex module:
VP interrupt
Voltage processor:
SMPS voltage cmd
SMPS: VP ack
1
5
4
6
7
2
3
prcm-UC-005
Public Version
www.ti.com
PRCM Functional Description
Figure 3-85. SmartReflex - SMPS Communication for Automatic Voltage Adjustments
3.5.6.6
Analog Cells, LDOs, and Level Shifter Controls
In addition to the VDD1 and VDD2 voltage controls, the PRM handles the following operations
automatically, based on hardware conditions, without any software control:
•
Reduces SRAM LDOs voltage when all memories are in retention
•
Reduces wake-up LDO voltage when the device enters off mode (wake-up leakage reduction)
•
Increases wake-up LDO voltage when emulation trace is active
•
Actively isolates level shifters during VDD1 and VDD2 removal
•
Activates sleep mode in all analog cells when the device enters off mode
3.5.6.6.1 ABB LDOs Control
ABB LDO supports two voltage modes:
•
BYPASS mode: In this mode the x_ABB LDO is bypassed and outputs the VDD_x_L voltages (x refers
to MPU and IVA). This mode is activated when FBB is not required, or when voltage domain enters
low-power mode.
•
FBB mode is enabled when the device is at highest OPP (OPP1G).
The PRCM provides the
register for configuration with the following controls:
•
SR2EN - To enable or bypass the ABB power management
•
ACTIVE_FBB_SEL - To enable or bypass FBB mode
•
SR2_WTCNT_VALUE - LDO settling delay on OPP change. The delay is in number of system clock
cycles.
The PRCM provides
register for control:
•
OPP_SEL - Current operational OPP
•
OPP_CHANGE - Initiate an OPP based ABB LDO setting change
•
SR2_STATUS - Current mode of operation of ABB LDO
•
SR2_IN_TRANSITION - ABB LDO is in transition.
389
SWPU177N – December 2009 – Revised November 2010
Power, Reset, and Clock Management
Copyright © 2009–2010, Texas Instruments Incorporated
Содержание OMAP36 Series
Страница 174: ...174 List of Tables SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 692: ...692 MPU Subsystem SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 1084: ...1084 IVA2 2 Subsystem SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 1990: ...1990 2D 3D Graphics Accelerator SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 2334: ...2334 Memory Subsystem SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 2700: ...2700 Memory Management Units SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 2868: ...2868 HDQ 1 Wire SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 2974: ...2974 UART IrDA CIR SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 3054: ...3054 Multichannel SPI SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 3462: ...3462 MMC SD SDIO Card Interface SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 3508: ...3508 General Purpose Interface SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 3584: ...3584 Initialization SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 3648: ...3648 Debug and Emulation SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...