Intel IQ31244 3.7DDR SDRAM, 3.7.1Upgrading SDRAM, 3.7.2Installation and Removal of Memory Modules

Intel® IQ31244 Customer Reference Board

3.7DDR SDRAM

The Intel® 80321 I/O Processor integrates a memory controller unit (MCU) to provide a direct interface between the processor and its local memory subsystem.The IQ31244 board is equipped with a 184-pin DIMM socket to accept a +2.5 V Double Data Rate (DDR) synchronous DRAM module with or without error correction code (ECC). This DDR SDRAM interface provides a direct connection to a reliable high-bandwidth memory subsystem. The socket accepts a 64- or 72-bit DDR SDRAM module with up to two 512 MByte banks for a maximum of 1 GByte. The SDRAM is accessible by the processor and the PCI bus by means of address translation by the memory management unit of the 80321.

3.7.1Upgrading SDRAM

The IQ31244 board is equipped with unbuffered DDR SDRAM with ECC inserted in the 184-pin DIMM socket. The memory can be expanded by inserting a maximum-sized memory module of 1 Gbyte into the DIMM socket. The supported memory combinations are shown in Table 11.

Table 11.	Supported SDRAM Configurations
	Type	Size	Class	Total Memory Size
		8M × 64	CL2	64 MBytes
		8M × 72
			CL2 ECC	64 MBytes
		16M × 64	CL2	128 MBytes
		16M × 72
			CL2 ECC	128 MBytes
	DDR 200	32M × 64	CL2	256 MBytes
		32M × 72	CL2 ECC	256 MBytes
		64M × 64	CL2	512 MBytes
		64M × 72	CL2 ECC	512 MBytes
		128M × 64	CL2	1 GByte
		128M × 72	CL2 ECC	1 GByte

3.7.2Installation and Removal of Memory Modules

Installation and removal of DIMMs on the IQ31244 are simple procedures and require no special tools. Remove the adapter module from the motherboard before its memory configuration is changed. Take care to avoid static discharge while contacting the module or the motherboard. Wear a properly connected grounding strap while installing or removing memory modules on the IQ31244.

Align the key cut-outs of the module to the key pins of the DIMM socket. The memory module must be inserted vertically, and the latches on the socket must engage the mounting holes on the DIMM module. Be sure that the latches on both sides of the module are properly engaged.

User’s Manual 21