DDR Mode (100 MHz)

UltraScale Architecture PCB Design User Guide (UG583)

Document ID
UG583
Release Date
2023-11-14
Revision
1.27 English

PCB and package skew between ALE/CE/CLE and CLK should be within ±50 ps.

To operate in mode 0 to mode 4, PCB and package skew between CLK and DQS should be within ±50 ps.

To operate in mode 5 at 100 MHz, PCB and package skew between CLK and DQS should be a minimum of 400 ps + 50 ps. CLK should be skewed with respect to DQS by 400 ps.

PCB and package skew between DQ and DQS should be within ±25 ps.

Place 4.7 kW pull-up resistors on CE and RB near the NAND device.

For devices without a DQS pin, the MPSoC MIO pin can be left unconnected or used for another purpose.