AR# 66571

描述

This article lists the current open PS DDR limitations with the configuration GUI in Vivado 2015.4.

解决方案

Limitations:

1. As per the Zynq UltraScale+ Technical Reference Manual, 32-bit + ECC is supported:

On Page 271 it states:

"Error correction code (ECC) support in 32-bit and 64-bit mode, 2-bit error detection and 1-bit error correction."

However, in the IP GUI, it shows as Disabled without any drop-down option for 32-bit.

2. For DDR4 with an Effective DRAM Bus Width of 64-bit, the DRAM IC Bus Width can only go up to 32 bits.

3. 16-bit DDR support does not exist in the Zynq UltraScale+ controller and needs to be removed from the GUI.

These issues are planned to be fixed starting in Vivado 2016.1.

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