Features

• Double-data-rate architecture; two data transfers per clock cycle

• The high-speed data transfer is realized by the 4 bits prefetch pipelined architecture

• Bi-directional differential data strobe (DQS and /DQS) is transmitted/received with data for capturing data at the receiver

• DQS is edge-aligned with data for READs; centeraligned with data for WRITEs

• Differential clock inputs (CK and /CK)

• DLL aligns DQ and DQS transitions with CK transitions

• Commands entered on each positive CK edge; data referenced to both edges of DQS

• Posted /CAS by programmable additive latency for better command and data bus efficiency

• Off-Chip-Driver Impedance Adjustment and On-Die-Termination for better signal quality

• /DQS can be disabled for single-ended Data Strobe operation

• 1 piece of PLL clock driver, 2 pieces of register driver and 1 piece of serial EEPROM (2K bits EEPROM) for Presence Detect (PD)