Altera建议不要使用afi_half_clk

此问题影响 DDR2 和 DDR3、LPDDR2、QDR II 和 RLDRAM II 产品。

以下警告消息可能会在 TimeQuest 中显示 运行 Report DDR 命令后的时序分析器。

在配备 DDR2、DDR3、LPDDR2、QDR II 的 Arria V 设备上， 或 RLDRAM II 接口：

Timing analysis was performed on core 内核名> using Quartus II v12.0 with a preliminary timing model and constraints. You must regenerate this IP in a future version of Quartus II to update the timing constraints to match the timing model.

在配备 LPDDR2、QDR II 或 RLDRAM II 的 Arria V 设备上 接口：

Core: 内核名> was generated using Quartus II v12.0 for Arria V. POF generation is not supported for this core in this release of Quartus II. You must regenerate this IP in a future version of Quartus II to obtain POF support..

在配备 DDR2、DDR3 或 LPDDR2 接口的 Cyclone V 设备上：

Core: 内核名 > was generated using Quartus II v12.0 for Cyclone V. POF generation is not supported for this core in this release of Quartus II. You must regenerate this IP in a future version of Quartus II to obtain POF support. Timing analysis was not performed on core 内核名 > because the Quartus II v12.0 software contains preliminary timing models for Cyclone V devices. You must regenerate this IP in a future version of Quartus II to update the timing model and constraints.

在 Stratix V 设备上配备 DDR2、DDR3、QDR II 或 RLDRAM II 接口：

Timing analysis was performed on core 内核名> using Quartus II v12.0 with a preliminary timing model and constraints. You must regenerate this IP in a future version of Quartus II to update the timing constraints to match the timing model.

此问题的变通办法是不要使用 afi_half_clk 。

此问题将无法解决。