Type: Answers

Area: Intellectual Property


IP Product: Triple Speed Ethernet MAC

Why does the Quartus II software version 11.0 give the following critical warning messages when compiling the Triple Speed Ethernet (TSE) IP Core?

Description

When I select one of the following TSE IP core variation:

1.     10/100/1000Mb Ethernet MAC with 1000BASE-X/SGMII PCS

2.     1000BASE-X/SGMII PCS

Critical Warnings:

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.

 

Or the following option is enabled under the MAC Options tab:

1.     Enable local loopback on MII/GMII/RGMII

Critical Warnings:

Critical Warning:  "mixed_port_feed_through_mode" parameter of RAM atom altera_tse_mac:altera_tse_mac_inst|altera_tse_top_gen_host:top_gen_host_inst|altera_tse_top_w_fifo_10_100_1000:U_MAC_TOP|altera_tse_loopback_ff:U_LBFF|altera_tse_a_fifo_24:U_LBFF|altera_tse_sdpm_altsyncram:U_RAM|altsyncram:altsyncram_component|altsyncram_o4e1: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:altera_tse_mac_inst|altera_tse_top_gen_host:top_gen_host_inst|altera_tse_top_w_fifo_10_100_1000:U_MAC_TOP|altera_tse_loopback_ff:U_LBFF|altera_tse_a_fifo_24:U_LBFF|altera_tse_sdpm_altsyncram:U_RAM|
altsyncram:altsyncram_component|altsyncram_o4e1:auto_generated|ram_block1a7 cannot have value "old" when different read and write clocks are used.

 

 

Solution:

This critical warning can be safely ignored in Quartus® II software version 11.0. This critical warning will not impact any functionality of the Triple Speed Ethernet IP core. If you wish to avoid from getting this critical warning, please avoid using the TSE core variants and MAC options shown above.   

 

This critical warning will be fixed in future release.