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System Memory Interface (SODIMM)—Intel
Table A-4.
DDR2 Signal Groups
Group
Data, Mask, & Strobe
Byte 0
Byte 1
Byte 2
Byte 3
Byte 4
Byte 5
Byte 6
Byte 7
Control
Control
Address & Command
Address / Command
Clocks
Clocks
DC Bias
DC Bias (I/O)
®
Intel
EP80579 Integrated Processor Product Line
Order Number: 320068-005US
®
EP80579 Integrated Processor Product Line
Signal Name
DDR_DQ[0..7],
DDR_DM0, &
Data Byte Lane0
DDR_DQS0/DQS0#
DDR_DQ[8..15],
DDR_DM1, & DQS1/
Data Byte Lane1
DDR_DQS1#
DDR_DQ[16..23],
DDR_DM2, & DQS2/
Data Byte Lane2
DDR_DQS2#
DDR_DQ[24..31],
DDR_DM3, & DQS3/
Data Byte Lane3
DDR_DQS3#
DDR_DQ[32..39],
DDR_DM4, &
Data Byte Lane4
DDR_DQS4/DQS4#
DDR_DQ[40..47],
DDR_DM5, &
Data Byte Lane5
DDR_DQS5/DQS5#
DDR_DQ[48..55],
DDR_DM6, &
Data Byte Lane6
DDR_DQS6/DQS6#
DDR_DQ[56..63],
DDR_DM7, &
Data Byte Lane7
DDR_DQS7/DQS7#
DDR_CKE[1:0]
Clock Enables
DDR_CS#[1:0]
Chip Selects
DDR_ODT[1:0]
On-Die-Termination
DDR_MA[14:0]
Memory Address
DDR_BA[2:0]
Bank Address (Bank Select)
DDR_RAS#
Row Address Select
DDR_CAS#
Column Address Select
DDR_WE#
Write Enable
DDR_CLK[1:0]/
Differential Clocks
DDR_CLK#[1:0]
• DDR_CRES[2:1] - Impedance compensation resistors.
• DDR_CRES[0] - Common return for DDR2 interface
DDR_CRES[2:0]
DDR_SLWCRES
Slew rate compensation for DDR2 interface (Analog)
DDR_RCOMPX
Impedance compensation for DDR2 interface
DDV_CRES
DDR2 resistor
DDR_VREF
Voltage Reference (Analog)
Description
compensation resistors on DDV_CRES,
DDR_SLWCRES and DDR_RCOMPX
May 2010
319
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