Apacer Technology Inc. DDR3 Synchronous DRAMs (SDRAMs) are high-density memory modules that come in BGA packages. These SDRAMs feature SSTL_15 interface, 1.5V±0.075V power supply (VDD), Serial Presence Detect (SPD), 8 and 4 Burst Lengths (BL) with Burst Chop (BC), and 7.8μs refresh cycles (at 0°C≤ TC ≤85°C). The DDR3 SDRAMs also feature 2 data transfers per clock cycle, different clock inputs, Data Mask (DM) for writing data, and Programmable Partial Array Self-Refresh (PASR). These SDRAMs support an auto pre-charge option for each burst access and auto-refresh/self-refresh.