SPRACU5C June 2021 – September 2023 AM2431 , AM2432 , AM2434 , AM6411 , AM6412 , AM6421 , AM6422 , AM6441 , AM6442
Ensure PDN analysis has been performed, and the required number of decoupling and bulk capacitors are provided for all the power supply rails including the Dual-voltage IO supply rails.
Place the decoupling capacitors as close as possible to the supply pins. Larger bulk capacitors can be placed further away.
Use low ESL capacitors and mount them with shortest possible traces to keep the mounting inductance low. For more information, refer the Sitara Processor Power Distribution Networks: Implementation and Analysis.
The bulk and decoupling capacitors values from the EVM can be used as a reference when PDN analysis is not available. For filtered (ferrite) power supplies implementation, follow the device-specific EVM.
Feedthrough (3-terminal) capacitors can be considered ( used on the SK-AM64B board) to optimize the number of capacitors used, minimizes the loop inductance and improve processor performance mainly the DDR performance.