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AR# 63398

Zynq-7000 AP SoC, DDRC - Does Xilinx support different DDR trace impedance values than those detailed in Table 5-10 of (UG933)?


I would like to use different trace impedances than those recommended by Xilinx in (UG933) for the PS DDR controller. 

Is this possible?


No, use of other trace impedances is not supported by Xilinx for the PS DDR controller.

LPDDR2 especially must use 40 Ohm trace impedances as the controlled impedance output drivers are tuned to this impedance.
AR# 63398
Date Created 01/23/2015
Last Updated 03/25/2015
Status Active
Type General Article
  • Zynq-7000
  • Zynq-7000Q
  • XA Zynq-7000