Public Version
PRCM Functional Description
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3.5.6.6.2 SRAM Voltage Control
The two embedded SRAM LDOs supply regulated voltage (VDD4 or VDD5) to memory banks. The
processor memory LDO (VDD4) has three reference voltages, while the CORE memory LDO (VDD5)
supports two:
•
1.2 V is the normal voltage reference, used for processors OPP50 and OPP100.
•
Tracking between 1.2 V and 1.35 V: The processor SRAM LDO (VDD4) tracks and follows VDD1
voltage when it exceeds OPP100 (1.2 V) nominal voltage. VDD1 (up to 1.35 V) is the overdrive voltage
reference when processors operate at OPP1G.
•
1.05 V is set when all memory banks belonging to the LDO are in retention state.
When not used (all memories are off), the LDO is in sleep mode. These modes are managed
automatically by hardware (PRM).
3.5.6.6.3 Wake-Up and Emulation Voltage Control
The embedded wake-up LDO (VDD3) supplies both WKUP and EMU power domains. It is permanently
active and feeds the WKUP power domain continuously. An embedded switch allows the PRM to control
power to the EMU power domain. This switch is closed on a software request command when a debug
session starts, or automatically on JTAG® plug detection.
This LDO has three reference voltages:
•
1.05 V is the normal voltage reference, used in device active mode.
•
1.15 V is the overdrive voltage reference used when emulation is activated and MPU emulation trace is
required.
•
0.82 V is set when the device is in low-power (off) mode, to minimize leakage.
These modes are managed automatically by hardware.
390
Power, Reset, and Clock Management
SWPU177N – December 2009 – Revised November 2010
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 ...