Cypress Semiconductor S27KL0641DABHI020, SDRAM 64Mbit Surface Mount, 100MHz, 24-Pin FBGA

The Cypress Semiconductor 64 Mb device is a high speed CMOS using self-refresh dynamic RAM (DRAM) with a hyper bus interface. It refresh control logic within the device
manages the refresh operation on the RAM array and hyper bus has a low-signal-count, double data rate (DDR) interface that achieve high-speed read and write throughput.

100 MHz clock rate (200 MBps) at 3.0 V VCC
Sequential burst transaction