Intel 9550 CM8063101049807 Data Sheet

161

FBD1NBICLK[C/D][P/N]0 I

These 

differential pair clock signals generated from the branch one, channel C and 

D of FB-DIMMs are input to the processor.

Example: FBD1NBICLKDP0 represent FB-DIMM branch 1, northbound clock input 

signal of channel D and positive bit of the differential pair. 

FBD0SBOCLK[A/B][P/N]0

O

These differential pair output clock signals generated from the processor are inputs 

to the branch zero, channel A and B of FB-DIMMs.

Example: FBD0SBICLKAP0 represent FB-DIMM branch 0, southbound clock output 

signal of channel A and positive bit of the differential pair. 

FBD1SBOCLK[C/D][P/N]0

O

These differential pair output clock signals generated from the processor are inputs 

to the branch one, channel C and D of FB-DIMMs.

Example: FBD1SBICLKDP0 represents FB-DIMM branch 1, southbound clock output 

signal of channel D and positive bit of the differential pair. 

FBD[0/1]REFSYSCLK[P/N]

I

These signals are no longer used by the Intel

®

 Itanium

®

 Processor 9300 Series and 

Intel

®

 Itanium

®

 9500 Series.

FBD0NBI[A/B][P/N][12:0]

I

These differential pair data signals generated from the branch zero, channel A and 

B of FB-DIMMs are input to the processor.

Example: FBD0NBIAP[0] represent FB-DIMM branch 0, northbound data input lane 

0 signal of channel A and positive bit of the differential pair. 

FBD0NBI[A/B][P/N][13]

I

These signals are spare lanes, and are intended for Reliability, Availability, and 

Serviceability (RAS) coverage on the Intel

®

 Itanium

®

 9500 Processor Series. These 

signals are not used by Intel

®

 Itanium

®

 9300 Processor Series.

Interface 

Name

Branch 

Number

North 

Bound

Input

Clock

Channel

Differential 

Pair
Polarity 

Positive/

Negative

Interface 

Name

Branch 

Number

South 

Bound

Output

Clock

Channel

Differential 

Pair
Polarity 

Positive/

Negative

Interface 

Name

Branch 

Number

South 

Bound

Output

Clock

Channel

Differential 

Pair
Polarity 

Positive/

Negative

Interface 

Name

Branch 

Number

North 

Bound

Input

Channel

Differential 

Pair
Polarity 

Positive/

Negative

Lane 

Number