AR# 55360


Ethernet 1000BASE-X PCS/PMA or SGMI v12.0, v11.5 and v11.4 - mmcm_locked not connected to GT tx_startup_fsm and rx_startup_fsm


If using the Ethernet 1000BASE-X PCS/PMA or SGMII core v12.0, v11.5 and v11.4, mmcm_locked is not connected to GT tx_startup_fsm and rx_startup_fsm. This could cause the GT reset logic to complete before the MMCM has locked and result in the link not coming up at power up or after a reset.


To resolve this issue, in the core_name_gtwizard_init.v[hd] file, map the signal GT0_TXUSERRDY_IN to the MMCM_LOCK input pin of gt0_txresetfsm_i and gt0_rxresetfsm_i. These inputs are currently tied to logic Vcc.

This is scheduled to be fixed in v13.0 of the core scheduled to be released in the 2013.2 design tools.

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AR# 55360
Date 05/17/2013
Status Active
Type General Article
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