The following figures show read/write waveforms with external CE. Using external CE is allowed for single UltraRAM blocks only, and is not supported for cascaded UltraRAMs. RDACCESS is not supported when USE_EXT_CE=TRUE.
Figure 1. External CE with Attributes IREG_PRE_A/B=FALSE, OREG_A/B=TRUE,
OREG_ECC_A/B=TRUE, USE_EXT_CE_A/B=TRUE
RDACCESS is not supported when USE_EXT_CE=TRUE.
Figure 2. External CE with Attributes IREG_PRE_A/B=FALSE, OREG_A/B=FALSE,
OREG_ECC_A/B=TRUE, USE_EXT_CE_A/B=TRUE
