Intel i7-950 AT80601002112AA User Manual

Product codes

AT80601002112AA

Electrical Specifications

Datasheet

2.7

Signal Groups

Signals are grouped by buffer type and similar characteristics as listed in

Table 2-3

. 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 2-4

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]