10.4.12.1.3 Single Clock (CLKB) or Independent Port A and B Clocks (CLKA and CLKB)

The default for Dual Port RAM is independent clocks (one each for Port A and Port B); click the Single clock checkbox to drive CLKA and CLKB with the same clock.

Clock Polarity

Click the up or down arrows to change the active edge of your clock. If you use independent clocks you can select the polarity of both the Port A (CLKA) and Port B (CLKB) clocks. The core configurator software instantiates inverters to achieve the specified polarity.