Width and Depth Expansion of the CY7C1021 (64K x 16) SRAM

Question: What is the recommended method to increase width and depth of SRAM



Depth Expansion: Connect to each other 16 bit address lines and 16 bit data lines respectively of both the SRAMs and use the chip select as 17th address line to select one memory chip. Now we have total depth of Memory is 128K x 16 bits.

Width Expansion: Combine 16-bit data bus of each chip and use it as 32-bit data bus, connect to each other 16 bit address lines respectively.  Now total width of memory is 64K x 32 bits.