DDR2 SDRAM Controller

特色

• Supports industrial standard Double Data Rate (DDR) and Double Date Rate2 (DDR2) SDRAM from 64Mbit to 2Gbit device sizes.
• Page hit detection to support multiple column accesses within the same row.
• Pipeline access enables continuous data bursting and hidden active commands, even in the case of page misses.
• Issue precharge, active and read/write commands to multiple banks at the same time.
• Integrated data buffer captures and synchronizes SDRAM data using programmable delay cells or DLL.
• User controlled variable additive latency for DDR2 device.
• On-die termination (ODT) optimized for single and multiple SDRAM DIMM.
• Off-Chip Driver impedance adjustment (OCD) support for DDR2 devices.
• Programmable SDRAM data width and user word size.
• Programmable SDRAM access timing parameters and burst length.
• Supports multiple external SDRAM banks.
• Automatic refresh generation with programmable refresh intervals.
• Self-refresh mode to reduce system power consumption.
• Optional ECC support.
• Designed with synthesizable HDL for ASIC and FPGA implementation