重大問題
當您編譯包含 1000BASE-X/SGMII PCS 的設計時 功能,Quartus II 軟體顯示下列警告 消息:
Critical Warning: "mixed_port_feed_through_mode" parameter
of RAM atom altera_tse_mac_pcs_pma_gige:altera_tse_mac_pcs_pma_gige_inst|altera_tse_mac_pcs_pma_strx_gx_ena:altera_tse_mac_pcs_pma_strx_gx_ena_inst|altera_tse_top_1000_base_x_strx_gx:top_1000_base_x_strx_gx_inst|altera_tse_top_sgmii_strx_gx:U_SGMII|altera_tse_top_rx_converter:U_RXCV|altera_tse_a_fifo_24:U_DSW|altera_tse_sdpm_altsyncram:U_RAM|altsyncram:altsyncram_component|altsyncram_q2e1:auto_generated|ram_block1a8 cannot
have value "old" when different read and write clocks are used.
Critical Warning: "mixed_port_feed_through_mode" parameter of RAM
atom altera_tse_mac_pcs_pma_gige:altera_tse_mac_pcs_pma_gige_inst|altera_tse_mac_pcs_pma_strx_gx_ena:altera_tse_mac_pcs_pma_strx_gx_ena_inst|altera_tse_top_1000_base_x_strx_gx:top_1000_base_x_strx_gx_inst|altera_tse_top_sgmii_strx_gx:U_SGMII|altera_tse_top_rx_converter:U_RXCV|altera_tse_a_fifo_24:U_DSW|altera_tse_sdpm_altsyncram:U_RAM|altsyncram:altsyncram_component|altsyncram_q2e1:auto_generated|ram_block1a7 cannot
have value "old" when different read and write clocks are used.
您可以安全地忽略警告訊息。
這個問題影響到所有包含 1000BASE-X/SGMII 的設計 PCS 功能。
沒有解決方法。這個問題將在未來的版本中解決 三速乙太網路 MegaCore 功能。