米6体育平台手机版

SPRZ412N December 2013 – May 2024 TMS320F28374D , TMS320F28375D , TMS320F28376D , TMS320F28377D , TMS320F28377D-EP , TMS320F28377D-Q1 , TMS320F28378D , TMS320F28379D , TMS320F28379D-Q1

1
Abstract
1Usage Notes and Advisories Matrices
1. 1.1 Usage Notes Matrix
2. 1.2 Advisories Matrix
2Nomenclature, Package Symbolization, and Revision Identification
3Silicon Revision C Usage Notes and Advisories
1. 3.1 Silicon Revision C Usage Notes
2. 3.2 Silicon Revision C Advisories
  1. Advisory
  2. Advisory
  3. Advisory
  4. Advisory
  5. Advisory
  6. Advisory
  7. Advisory
  8. Advisory
  9. Advisory
  10. Advisory
  11. Advisory
  12. Advisory
  13. Advisory
  14. Advisory
  15. Advisory
  16. Advisory
  17. Advisory
  18. Advisory
  19. Advisory
  20. Advisory
  21. Advisory
  22. Advisory
  23. Advisory
  24. Advisory
  25. Advisory
  26. Advisory
  27. Advisory
  28. Advisory
  29. Advisory
  30. Advisory
  31. Advisory
  32. Advisory
  33. Advisory
  34. Advisory
  35. Advisory
  36. Advisory
  37. Advisory
  38. Advisory
4Silicon Revision B Usage Notes and Advisories
1. 4.1 Silicon Revision B Usage Notes
2. 4.2 Silicon Revision B Advisories
  1. Advisory
  2. Advisory
  3. Advisory
  4. Advisory
  5. Advisory
  6. Advisory
  7. Advisory
  8. Advisory
  9. Advisory
5Silicon Revision A Usage Notes and Advisories
1. 5.1 Silicon Revision A Usage Notes
2. 5.2 Silicon Revision A Advisories
  1. Advisory
  2. Advisory
  3. Advisory
  4. Advisory
  5. Advisory
  6. Advisory
  7. Advisory
  8. Advisory
  9. Advisory
  10. Advisory
  11. Advisory
6Silicon Revision 0 Usage Notes and Advisories
1. 6.1 Silicon Revision 0 Usage Notes
2. 6.2 Silicon Revision 0 Advisories
  1. Advisory
7Documentation Support
8Trademarks
9Revision History

Advisory

Low-Power Modes: Power Down Flash or Maintain Minimum Device Activity

Revisions Affected

0, A, B, C

Details

The device has an intentional current path from V_DD3VFL (flash supply) to V_DD. Since the HALT, STANDBY, IDLE, or other low-activity device conditions can have low current demand on V_DD, this V_DD3VFL current can cause V_DD to rise above the recommended operating voltage.

There will be zero current load to the external system V_DD regulator while in this condition. This is not an issue for most regulators; however, some system voltage regulators require a minimum load for proper operation.

Workarounds

Workaround 1: Power down the flash before entering HALT, STANDBY, IDLE, or other low-activity device conditions. This will disable the internal current path. This workaround must be executed from RAM.


       // CPU-1
       EALLOW;
       // seize the pump semaphore
       while (IpcRegs.PUMPREQUEST.bit.SEM != 0x2)
       {
             IpcRegs.PUMPREQUEST.all = IPC_PUMP_KEY | 0x2;
       }     
       Flash0CtrlRegs.FBFALLBACK.bit.BNKPWR0 = 0;
       asm(" RPT #8 || NOP");
       // power down pump
       Flash0CtrlRegs.FPAC1.bit.PMPPWR = 0;
       asm(" RPT #8 || NOP");
       // release pump semaphore
       IpcRegs.PUMPREQUEST.all = IPC_PUMP_KEY | 0x0;
       EDIS;
       // enter low power mode
       asm(" IDLE");
       // CPU-2
       EALLOW;
       // seize the pump semaphore
       while (IpcRegs.PUMPREQUEST.bit.SEM != 0x1)
       {
             IpcRegs.PUMPREQUEST.all = IPC_PUMP_KEY | 0x1;
       }
     
       Flash0CtrlRegs.FBFALLBACK.bit.BNKPWR0 = 0;
       asm(" RPT #8 || NOP");
       // power down pump
       Flash0CtrlRegs.FPAC1.bit.PMPPWR = 0;
       asm(" RPT #8 || NOP");
       // release pump semaphore
       IpcRegs.PUMPREQUEST.all = IPC_PUMP_KEY | 0x0;
       EDIS;
       // enter low power mode
       asm(" IDLE");

Workaround 2: Keep SYSCLK at a minimum of 100 MHz during STANDBY or IDLE. This activity will be sufficient to consume the internal current.

Workaround 3: An external 82-Ω resistor can be added to the board between V_DD and V_SS.