The DDR I/O buffer (DDRIOB) DCI impedance adjustment mode (slcr.DDRIOB_DCI_CTRL [UPDATE_CONTROL]) should be set according to the Calibration table in Chapter 10 of the TRM v1.5 or later.
| Impact: | Trivial. |
| Work-around: | None. |
| Configurations Affected: | Systems that DDR in the PS. |
| Device Revision(s) Affected: | Refer to (Xilinx Answer 47916) - Zynq-7000 SoC Silicon Revision Differences |
January 2013: slcr.DDRIOB_DCI_CTRL.UPDATE_CONTROL must be set to '0' for DCI operation, to allow the VRN/VRP to sample the reference resistors.
| Answer Number | Answer Title | Version Found | Version Resolved |
|---|---|---|---|
| 47916 | Zynq-7000 SoC Devices - Silicon Revision Differences | N/A | N/A |
| AR# 47521 | |
|---|---|
| Date | 06/13/2018 |
| Status | Active |
| Type | Design Advisory |
| Devices | |