External CE Usage – USE_EXT_CE_[A|B] - External CE Usage – USE_EXT_CE_[A|B] - UG573

This attribute enables the use of external CE inputs to control all the output pipeline stages in non-cascade mode. By default, the design uses the internally generated CEs to control all the pipeline stages. This does not apply to the OREG_CAS registers enables. In cascade mode, the OREG_CAS register enables are automatically controlled by the UltraRAM. Using the RDACCESS output signal is not allowed when external CE mode is enabled.