SPRABU8A May   2014  – July 2025 AM3352 , AM3354 , AM3356 , AM3357 , AM3358 , AM3359

 

  1.   1
  2.   AM335x Power Estimation Tool
  3.   Trademarks
  4. 1Introduction
  5. 2Input Spreadsheet
    1. 2.1 Macro Buttons
    2. 2.2 Section A: High-Level System Configuration
    3. 2.3 Section B: Processors
    4. 2.4 Section C: Peripherals
    5. 2.5 Section D: Analog Modules
  6. 3Spreadsheet Upload
  7. 4Power Analysis Report
    1. 4.1 Power Estimation Report Sheet
    2. 4.2 Module Utilization Sheet
  8. 5Summary
  9. 6References
  10. 7Revision History

4.1 Power Estimation Report Sheet

The power estimation tool generates a power analysis report in a spreadsheet format (see Table 4-1). The estimated values are leakage, active and total average power over the time during the entire application scenario. The report also lists per power rail groups. When SmartReflex (AVS) is enabled, MPU and CORE voltage rails show controlled voltages by SmartReflex.

Input file name: am335x_pet_input_example.xls

Junction Temperature (°C)

Device Process: nominal

ARM Clock Freq [MHz]: NITRO (1000)

Table 4-1 Power Estimation Report
Voltage (V) Current (A) Power (W)
MIN MAX Leakage Active Average Total
VDD_MPU 1.33 1.33 0.002 0.542 0.544 0.72315
VDD_CORE 1.10 1.10 0.002 0.170 0.171 0.18828
VDDS_DPLL [1] 1.80 1.80 0.000 0.007 0.007 0.01195
VDDS_SRAM [2] 1.80 1.80 0.005 0.000 0.005 0.00815
VDDS_DDR 1.50 1.50 0.000 0.003 0.003 0.00533
VDDS_1P8 [3] 1.80 1.80 0.000 0.002 0.002 0.00348
VDDS_3P3 [4] 3.30 3.30 0.000 0.000 0.000 0.00016
VDDA1P8V_USB0/1, VDDA_ADC 1.80 1.80 0.000 0.000 0.000 0.00090
VDDA3P3V_USB0/1 3.30 3.30 0.000 0.000 0.000 0.00000
Total 0.94140
  1. VDDS_DPLL includes VDDS_PLL_MPU, VDDS_PLL_CORE_LCD and VDDS_PLL_DDR power supplies.
  2. VDDS_SRAM includes VDDS_SRAM_CORE_BG and VDDS_SRAM_MPU_BB power supplies.
  3. VDDS_1P8 includes VDDS, VDDS_RTC, VDDS_OSC and 1.8V VDDSHVx power supplies.
  4. VDDS_3P3 includes 3.3V VDDSHVx power supplies.

Power consumption in the AM335x device consists of:

  • Leakage power: due to leakage current, and dependent on temperature and device process
  • Active power: due to transistor switching, and independent of temperature

The AM335x Power Estimation Tool models temperature and device process effects on device power consumption. Active power consumption is the power that is consumed by portions of the AM335x that are performing some processing. Active power is independent of temperature, but dependent on voltage and module activity levels.