No Change Mode

In No Change mode, the rdata[A|B] (read data) remains unchanged if both we[A|B] and clke[A|B] signals are high. However, if we[A|B] signal goes low, the RAM behaves as the Read First mode where it returns the previous stored data in the corresponding address as occurred in address 1 and address 4 in the following figure.

Figure 1. No Change Mode Example (True Dual-Port RAM). The [A|B] in signal labels refers to either one port at one time. Not both ports at the same time.