Read First Mode

In Read First mode, the read data output returns the data that was previously stored at each respective address. At the same time, writing new input data into the memory.

Figure 1. Read First Mode Example (Single-Port and Simple Dual-Port RAM)

Figure 2. Read First Mode Example (True Dual-Port RAM). The [A|B] signal labels are referring to either one port at one time. Not both ports at the same time.
Notice: Refer to Conflict Resolution if the data input on port A and Port B are different in True Dual-Port RAM.