Electrical Specifications
18
Datasheet
2.7
Signal Groups
Signals are grouped by buffer type and similar characteristics as listed in
. The
buffer type indicates which signaling technology and specifications apply to the signals.
All the differential signals, and selected DDR3 and Control Sideband signals have On-
Die Termination (ODT) resistors. There are some signals that do not have ODT and
need to be terminated on the board. The signals that have ODT are listed in
.
Table 2-3.
Signal Groups (Sheet 1 of 2)
Signal Group
Type
Signals
1,2
System Reference Clock
Differential
Clock Input
BCLK_DP, BCLK_DN
Intel
®
QPI Signal Groups
Differential
Intel QPI Input
QPI_DRX_D[N/P][19:0], QPI_CLKRX_DP,
QPI_CLKRX_DN
Differential
Intel QPI Output
QPI_DTX_D[N/P][19:0], QPI_CLKTX_DP,
QPI_CLKTX_DN
DDR3 Reference Clocks
Differential
DDR3 Output
DDR{0/1/2}_CLK[D/P][3:0]
DDR3 Command Signals
Single ended
CMOS Output
DDR{0/1/2}_RAS#, DDR{0/1/2}_CAS#,
DDR{0/1/2}_WE#, DDR{0/1/2}_MA[15:0],
DDR{0/1/2}_BA[2:0]
Single ended
Asynchronous Output
DDR{0/1/2}_RESET#
DDR3 Control Signals
Single ended
CMOS Output
DDR{0/1/2}_CS#[5:4], DDR{0/1/2}_CS#[1:0],
DDR{0/1/2}_ODT[3:0], DDR{0/1/2}_CKE[3:0]
DDR3 Data Signals
Single ended
CMOS Bi-directional
DDR{0/1/2}_DQ[63:0]
Differential
CMOS Bi-directional
DDR{0/1/2}_DQS_[N/P][7:0]
TAP
Single ended
TAP Input
TCK, TDI, TMS, TRST#
Single ended
GTL Output
TDO
Control Sideband
Single ended
Asynchronous GTL Output
PRDY#
Single ended
Asynchronous GTL Input
PREQ#
Single ended
GTL Bi-directional
CAT_ERR#, BPM#[7:0]
Single Ended
Asynchronous Bi-directional
PECI
Single Ended
Analog Input
COMP0, QPI_CMP[0], DDR_COMP[2:0]
Single ended
Asynchronous GTL Bi-
directional
PROCHOT#
Single ended
Asynchronous GTL Output
THERMTRIP#
Single ended
CMOS Input/Output
VID[7:6]
VID[5:3]/CSC[2:0]
VID[2:0]/MSID[2:0]
VTT_VID[4:2]
Summary of Contents for Core i7 Extreme Edition
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