SPRACU5C June 2021 – September 2023 AM2431 , AM2432 , AM2434 , AM6411 , AM6412 , AM6421 , AM6422 , AM6441 , AM6442
The following clocking options can be considered for sourcing the PCIe interface (common clocking architecture) clock
The clock generator outputs can be connected to the processor and the add-on card (on-board PCIe connector) as a common clock. Follow the clock generator recommendations for terminating the clock outputs.
The processor clock output can be connected as the clock input to the add-on card. Place 50 Ω resistor at the clock output terminals (P and N) with respect to ground closer to the processor.
The external clock from the add-on card is connected as the clock input to the processor. If the clock from the add-on card is in no Re-biasing mode place a 0 Ω series resistors and if the clock from the add-on card is in Re-biasing mode place a 0.1uF capacitor (AC-coupling) 0402 package. Place the capacitors closer to the receiver.