What this QDR II SRAM does on the board
The CY7C1413KV18-300BZCT is a 36 Mbit synchronous SRAM built on Cypress's QDR II architecture. It clocks at 300 MHz and organizes the memory as 2M x 18 bits. The QDR II interface eliminates dead cycles on back-to-back reads and writes — the bus stays full every clock edge, which is what a high-throughput networking or test-equipment buffer needs.
300 MHz — what it means for bus timing
At 300 MHz, the QDR II interface samples data on both clock edges.