Intel Xeon 7130N LF80550KF0878M Data Sheet

15

Most Dual-Core Intel Xeon processor 7000 series FSB signals use Assisted Gunning Transceiver 
Logic (AGTL+) signaling technology. The termination voltage level for the Dual-Core Intel Xeon 
processor 7000 series AGTL+ signals is V

TT

.

Termination resistors are provided on the processor silicon and are terminated to V

TT

. Intel chipsets 

also provide on-die termination, thus eliminating the need to terminate the bus on the system board 
for most AGTL+ signals. Some AGTL+ signals do not include on-die termination and must be 
terminated on the system board. 

When designing a system, Intel strongly recommends that design teams perform analog 
simulations of the FSB. Design guidelines for the Dual-Core Intel Xeon processor 7000 series FSB 
are detailed in the appropriate platform design guide.

Some Dual-Core Intel Xeon processor 7000 series signals include additional on-die resistors (R

L

) 

to ensure proper noise margin and signal integrity specifications are met—see 

 for a list of 

 illustrates the active on-die termination. Signal listings are included in 

 and 

 

BCLK[1:0] directly controls the FSB interface speed as well as the core frequency of the processor. 
As in previous processor generations, the Dual-Core Intel Xeon processor 7000 series core 
frequency is a multiple of the BCLK[1:0] frequency. The processor bus ratio multiplier will be set 
during manufacturing.  

Signal

V

TT

R

TT

Signal

R

L