Public Version
PRCM Functional Description
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2. MPU software programs the IVA2 power domain to go to retention power state during the next sleep
transition.
3. The DSP goes to idle mode, and the CM gates the IVA2 clock. The IVA2 power domain enters inactive
power state.
4. The IVA2 power domain enters retention power state.
5. The IVA2 power domain is awakened.
6. The PRM asserts the cold reset IVA_RSTPWRON and all IVA2 warm resets asynchronously.
7. The PRCM.
[2] RST3_IVA2 bit is automatically reset to its reset value.
8. The IVA2 power domain is inactive.
9. IVA2 clocks are automatically reenabled. The IVA2 power domain enters active power state.
10. The PRM releases the IVA2_RSTPWRON reset signal when reset manager 2 in the IVA2 power
domain times out.
11. On release of IVA2_RSTPWRON, the IVA2 performs an initialization sequence.
12. The PRCM.
register is updated accordingly on release of the IVA2_RSTPWRON
reset signal.
13. The IVA2.2 subsystem asserts the IVA2_RSTDONE signal when initialization completes.
14. The PRM module releases the IVA2_RST1 and IVA2_RST2 reset signals. The DSP boots in
autonomous mode.
15. DSP software enables the SEQ clock.
16. DSP software clears the PRCM.
[2] RST3_IVA2 bit. The PRM module waits for
reset manager 3 in the IVA2 power domain to time out.
17. After reset manager 3 times out, the PRM module releases the IVA2_RST3 reset signal. The SEQ
boots.
18. The PRCM.
[10] IVA2_SW_RST3 bit is updated accordingly on release of the
IVA2_RST3 reset signal.
There are two alternate sequences:
•
The DSP is held under reset when exiting retention power state. This is done when the MPU software
writes 1 to the PRCM.
[0] RST1_IVA2 bit. In this case, the MPU software must
clear this bit to 0 to reboot the DSP.
•
The DSP and MMU are held under reset when exiting retention power state (the MPU software writes
1 to the PRCM.
[1] RST2_IVA2
bits). In this case, the MPU software must first clear the PRCM.
[1] RST2_IVA2 bit
to allow the release of the reset IVA_RSTPWRON and subsequently (after initialization) the release of
IVA2_RST2. Only after the MPU software reprograms the MMU or downloads the DSP code can it
clear the PRCM.
[0] RST1_IVA2 bit field to boot the DSP.
NOTE:
•
Although the IVA2.2 WUGEN module and DPLL2 are part of the IVA2.2 subsystem, they
are also part of the CORE power domain and the DPLL2 power domain, respectively.
They are reset independently from the IVA2 power domain.
•
The IVA2_RSTPWRON reset is released by software by programming the
PRCM.
[1] RST2_IVA2 bit. Setting the
[1] RST2_IVA2 bit does not assert IVA2_RSTPWRON.
•
IVA2_RST3 is asserted when the IVA2 power domain transitions from off or retention
state to on state. The corresponding bit in the PRCM.
register is
automatically set to 1 during this transition.
•
The release of the IVA2_RST3 reset is stalled as long as the IVA2_RST2 reset is not
released.
•
The release of the IVA2_RST2 and IVA2_RST1 resets causes IVA2 to deassert the
IVA2_RSTDONE signal.
280
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 ...