The circuit is activated by the falling edge of E. The address and control inputs open simultaneously. According to the information of W and G, the data inputs, or outputs, are active. During the active state E = L each address change leads to a new Read or Write cycle. In a Read cycle, the data outputs are activated by the falling edge of G, afterwards the data word will be available at the outputs DQ0-DQ7. After the address change, the data outputs go High-Z until the new