AR# 62338

Soft Error Mitigation - Reccommendation on use of BUFGCE for clocking SEM IP


This Answer Record describes how BUFGCE can be useful in operating the SEM IP safely.


A BUFGCE can be used with the SEM controller clock for a variety of purposes:

  • When clock management (PLL,DCM or MMCM) is used, a BUFGCE should be used to suppress the clock toggling to the SEM controller until the clock is stable and the PLL/DCM lock is achieved.
  • A BUFGCE may be used to disable or delay start-up of the SEM IP during debug.
    With the CE pin initially disabled, the BUFGCE will suppress the clock toggling to the SEM controller.
    The CE pin may be enabled programmatically at run-time by the system to start up the SEM IP.
    Alternatively, the icap_grant input to the SEM IP may be used to achieve the same purpose without disabling the clock.

Linked Answer Records

Master Answer Records

Answer Number Answer Title Version Found Version Resolved
54642 Soft Error Mitigation IP Core - Release Notes and Known Issues for Vivado 2013.1 and newer tool versions N/A N/A
AR# 62338
Date 10/15/2014
Status Active
Type General Article
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