These are data lines this the output the address decoder
Solved Step by Step With Explanation- Port-Mapped RAM Control Design
Questions
Solved Step by Step with Explanation- Port-Mapped RAM Control Design
b) Answer
Port 3's P3.0 will be used as the Write Strobe (W) signal, and Port 3's P3.1 will be used as the Read Strobe (R) signal.
Port 3's P3.2 will be used as the Chip Enable (CE) signal for the 2-to-4 decoder.
Address Latch (composed of 74LS373 or similar latch)
Address Decoder (composed of 74LS138 or similar 3-to-8 decoder)
P1.4, P1.5, P1.6, P1.7: These are data lines.
P3.0: This is the output of the address decoder.
Data Lines (P1.4, P1.5, P1.6, P1.7): These lines are used for data input and output to/from the selected RAM device.
Control Lines (P3.1, P3.2, P3.3): These lines are control signals used to perform read and write operations on the selected RAM device:
The 4-bit address lines (P1.0, P1.2, P1.3, P1.7) are used to select one of the four RAM devices by providing a unique address.
The address decoder (P3.0) takes the 4-bit address as input and generates the appropriate chip enable (CE) control signals for each RAM device based on the address provided.
