MITSUBISHI MITSUBISHI 〈DIGITAL 〈DIGITAL ASSP ASSP 〉 〉 M66220SP/FP M66220SP/FP × 8-BIT MAIL-BOX 256256 × 8-BIT MAIL-BOX DESCRIPTION The M66220 is a mail box that incorporates a complete CMOS shared memory cell of 256 × 8-bit configuration using high-performance silicon gate CMOS process technology, and is equipped with two access ports of A and B.
Access ports A and B are equipped with independent addresses CS, WE and OE control pins and I/O pins to allow independent and asynchronous read/write operations from/to shared memory individually.
This product also incorporates a port adjustment arbitration function in address contention from both ports.
PIN CONFIGURATION (Top view) CHIP SELECT C...

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