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

2.2 Section A: High-Level System Configuration

This section allows users to select the device revision, choose DDR type and loading, set a junction temperature (not ambient temperature) between 0°C and 105°C, power estimation mode, SmartReflex AVS (Adaptive Voltage Scaling) and Dual-Voltage I/O VDDSHVx voltages as shown in Table 2-1.

Table 2-1 Section A of AM335x PET Input Spreadsheet
Device Revision(1)(2) PG2.1
DDR Type DDR3
DDR Loading 1
Junction Temperature (°C) 25
Power Estimation Mode Typ
Smart Reflex off
VDDSHV1 Voltage (V) 1.8
VDDSHV2 Voltage (V) 1.8
VDDSHV3 Voltage (V) 1.8
VDDSHV4 Voltage (V) 1.8
VDDSHV5 Voltage (V) 1.8
VDDSH61 Voltage (V) 1.8
Power Mode Active
Dynamic Power Switching Off
(1) MAX: Worst case power consumption
(2) TYP: Typical case power consumption
  • Device Revision: PG2.1, PG1.0 (evaluate PG2.1)
  • DDR Type: mDDR, DDR2, DDR3, DDR3L,None
  • DDR Loading: 0, 1, 2 (corresponds to the number of DDR devices in the system)
  • Junction Temperature (°C): approximately 0-105 (negative values are not supported in the tool)
  • Power Estimation Mode: Max, Typ ('Max' accounts for the worst-case silicon process variation)
  • SmartReflex: On, Off
  • VDDSHVx Voltage [V]: 1.8 or 3.3
  • Power Mode: Active, Standby, DeepSleep1, DeepSleep0, RTC Only
  • Dynamic Power Switching: On, Off (currently only supported for PD_GFX)
Table 2-2 Typical Power Modes
Power Modes Application State Power Domains, Clocks, and Voltage Supply States
Active All Features Power supplies:
All power supplies are ON.
VDD_MPU = 1.1V (nom)
VDD_CORE = 1.1V (nom)
Clocks:
Main Oscillator (OSC0) = ON
All DPLLs are locked.
Power domains:
PD_PER = ON
PD_MPU = ON
PD = GFX = ON or OFF (depending on use case)
PD_WKUP = ON
DDR is active
Standby DDR memory is in self-refresh and contents are preserved. Wakeup from any GPIO. Cortex™-A8 context and register contents are lost and must be saved before entering standby. On exit, context must be restored from DDR. For wakeup, boot ROM executes and branches to system resume. Power supplies:
All power supplies are ON.
VDD_MPU = 0.95V (nom)
VDD_CORE = 0.95V (nom)
Clocks:
Main Oscillator (OSC0) = ON
All DPLLs are in bypass.
Power domains:
PD_PER = ON
PD_MPU = OFF
PD = GFX = OFF
PD_WKUP = ON
DDR is in self-refresh.
Deepsleep1 On-chip peripheral registers are preserved. Cortex-A8 context/registers are lost, so the application needs to save them to the L3 OCMC RAM or DDR before entering DeepSleep. DDR is in self-refresh. For wakeup, boot ROM executes and branches to system resume. Power supplies:
All power supplies are ON.
VDD_MPU = 0.95V (nom)
VDD_CORE = 0.95V (nom)
Clocks:
Main Oscillator (OSC0) = OFF
All DPLLs are in bypass.
Power domains:
PD_PER = ON
PD_MPU = OFF
PD = GFX = OFF
PD_WKUP = ON
DDR is in self-refresh.
Deepsleep0 PD_PER peripheral and Cortex-A8/MPU register information are lost. On-chip peripheral register (context) information of PD-PER domain needs to be saved by application to SDRAM before entering this mode. DDR is in self-refresh. For wakeup, boot ROM executes and branches to peripheral context restore followed by system resume. Power supplies:
All power supplies are ON.
VDD_MPU = 0.95V (nom)
VDD_CORE = 0.95V (nom)
Clocks:
Main Oscillator (OSC0) = OFF
All DPLLs are in bypass.
Power domains:
PD_PER = ON
PD_MPU = OFF
PD = GFX = OFF
PD_WKUP = ON
DDR is in self-refresh.
RTC-Only RTC timer remains active and all other device functionality is disabled. Power supplies:
All power supplies are OFF except.
VDDS_RTC,
VDD_MPU = 0V
VDD_CORE = 0V
Clocks:
Main Oscillator (OSC0) = OFF
Power domains:
All power domains are OFF.

The spreadsheet presents information only for the full-featured devices in the AM335x family. However, since the spreadsheet breaks out the power consumption due to each module in the full-featured device, estimates for the other devices in the AM335x family can be obtained by setting zero for the modules not present in the device under consideration. This makes sure that active power from the non-applicable modules are not included in the power tally. The device differences are summarized in the overview section in AM335x Device Evaluation Wiki.