EP80579 Datasheet, PDF (289/1916 Pages) Intel Corporation – Intel® EP80579 Integrated Processor Product Line

Intel^® EP80579 Integrated Processor
11.0
11.1
11.2
System Memory Controller
Overview
The memory controller is responsible for controlling the off-chip DRAM devices. The
unit scheduler, control and protocol state machines access DRAM devices over a wide
range of speed bins using DDR2 DRAM technology. The EP80579 supports one memory
channel.
Memory Controller Feature List
The memory controller supports the following features
• Supports 1 DIMM
— DDR2
— 64 and 32-bit mode.
— Single rank (64 or 32-bit mode) or Dual rank (64 bit mode) device.
— DDR2-400, DDR2-533, DDR2-667, DDR2-800.
— See to “Rules for Populating DIMM Slots” for more details.
• Supports dual DIMMs
— DDR2 and 64 bit mode only
— Registered Dual DIMM support with 1T command/address timing. Unbuffered
Dual DIMM support with 2T command/address timing. Please refer to “2T
Timing Mode” for details.
— 32-bit mode dual DIMM is not supported
— Restrictions on speed, number of ranks and modes in 2 DIMM mode, refer to
“Rules for Populating DIMM Slots” for details.
— DDR2-400 is supported.
— DDR2-533 and DDR2-667 are also supported with special design guidelines.
Refer to Table 11-5 for more details.
• Supports 32-bit mode
— 32-bit mode is for memory-down configuration, thus the following modes are
not supported: dual DIMM, dual rank, registered
• Supports 256 Mb, 512 Mb, 1 Gb and 2 Gb density parts in the x8 configuration.
Table 11-1 shows the various DDR2 device densities and widths supported.
Table 11-2 and Table 11-3 shows the various memory capacity configurations
supported using these parts in the 64 bit and 32-bit modes.
— Memory Controller does not support 4 Gb density
— See Section 11.3, “Configurations” for more details.
• Supports 4-bank devices
— 256 Mb and 512 Mb DDR2 parts
August 2009
Order Number: 320066-003US
Intel^® EP80579 Integrated Processor Product Line Datasheet
289