CYM1622

The CYM1622 is a very high performance 1-megabit static RAM module organized as 64K words by 16 bits. The  CYM1622  is constructed using four 64K x 4 static RAMs mounted onto a vertical substrate with pins. The pinout of the  CYM1622  is compatible with another Cypress module (CYM1611) to maximize system flexibility.

Writing to the memory module is accomplished when the chip select (CS) and write enable (WE) inputs of the  CYM1622 are both LOW. Data on the sixteen input/output pins (I/O₀ through I/O₁₅) of the device is written into the memory location specified on the address pins (A₀ through A₁₅).

Reading the CYM1622 is accomplished by taking chip select (CS) and output enable (OE) LOW, while write enable (WE) remains inactive or HIGH. Under these conditions, the contents of the memory location specified on the address pins will appear on the appropriate data input/output pins. The input/output pins remain in a high-impedance state unless the module is selected, outputs are enabled, and write enable (WE) is HIGH.