Forterra, Inc. manufactures water and drainage pipe and products in the United States and Eastern Canada. It also manufactures structural and specialty precast products, and precast concrete bridge girders; and prestressed concrete, welded steel,â¦.
Called double data rate (or DDR), it let the memory transfer data on both the rising and falling edges of the clock signal, giving it the capability to move information nearly twice as quickly as with regular SDR SDRAM.
Compared to single data rate (SDR) SDRAM, the DDR SDRAM interface makes higher transfer rates possible by more strict control of the timing of the electrical data and clock signals. Implementations often have to use schemes such as phase-locked loops and self-calibration to reach the required timing accuracy.