SPRABF9 March   2019 TMS320C6742 , TMS320C6742 , TMS320C6746 , TMS320C6746 , TMS320C6748 , TMS320C6748

 

  1.   1
  2.   Trademarks
  3. 1Introduction
  4. 2Model Activity
    1. 2.1 Activity-Based Models
    2. 2.2 Baseline Power
    3. 2.3 Activity Power
    4. 2.4 Modules
  5. 3Using the Power Estimation Spreadsheet
    1. 3.1 Choosing Appropriate Values
      1. 3.1.1 Utilization
      2. 3.1.2 % Writes
      3. 3.1.3 % Switching
  6. 4Using the Results
    1. 4.1 Adjusting I/O Power Result
  7. 5Thermal Considerations
  8. 6Example
  9. 7Limitations
  10. 8References

2.4 Modules

The C6748/46/42 power estimation spreadsheet contains the following modules with adjustable parameters:

  • C674x VLIW DSP
  • System-on-Chip (SoC)
  • Programmable Real-time Unit Subsystem (PRUSS)
  • External Memory Interface A (EMIFA)
  • DDR2/Mobile DDR Memory Controller (DDR2/mDDR)
  • Enhanced Direct-Memory-Access Controller 3 (EDMA3)
  • Ethernet Media Access Controller (EMAC)
  • LCD Controller (LCDC)
  • Video Port Interface (VPIF)
  • Universal Serial Bus 1.1 OHCI Host (USB1.1)
  • Universal Serial Bus 2.0 OTG Port (USB2.0)
  • Multichannel Audio Serial Ports (McASP)
  • Multichannel Buffered Serial Ports (McBSP)
  • Multimedia Card/Secure Digital Card Interface (MMCSD)
  • Serial Peripheral Interface (SPI)
  • Inter-Integrated Circuit (I2C)
  • General-Purpose Timer (TIMER)
  • Enhanced Capture Modules (ECAP)
  • Enhanced Pulse Width Modulators (EHRPWM)
  • Universal Asynchronous Receiver/Transmitter (UART)
  • Universal Host Port Interface (UHPI)
  • General-Purpose Input/Output (GPIO)
  • Real-Time Clock (RTC)

Although EDMA3 is listed as a separate module, the row essentially provides the power consumption for turning on the clock to the channel controller and the transfer controller(s) for a particular device frequency and voltage. The EDMA3 activity power is included in the module/peripheral serviced by the EDMA3. Therefore, in estimating power for peripherals that typically use EDMA3 for their transfers, the EDMA3 should be kept enabled. For available peripherals and peripheral configurations, please see the device-specific data manual.