Product Description This specification defines the electrical and mechanical requirements for 288-pin, 1.2V (VDD) double data rate, synchronous DRAM, registered dual in-line memory modules (DDR4 SDRAM RDIMMs). The very low profile RDIMM (VLP RDIMM), MiniRDIMM, and VLP MiniRDIMM are also defined by this specification. These DDR4 RDIMMs are intended for use as main memory when installed in servers. Some specifications are part number-specific; referto the module data sheet addendum of the specific Micron part number (MPN) for the complete specification. Features • DDR4 functionality and operations supported as defined in the component data sheet • 288-pin RDIMM • Supports ECC error detection and correction • On-board I 2C temperature sensor with integrated serial presence-detect (SPD) EEPROM • Nominal and dynamic on-die termination (ODT) for data, strobe, and mask signals • Low-power auto self refresh (LPASR) • On-die VREFDQ generation and calibration • Fixed burst chop (BC) of 4 and burst length (BL) of 8 via the mode register set (MRS) • Selectable BC4 or BL8 on-the-fly (OTF) • Gold edge contacts • Halogen-free • Fly-by topology • Terminated control, command, and address bus