Datasheet 25

Electrical Specifications

2.7 Signaling Specifications

Most processor Front Side Bus signals use Gunning Transceiver Logic (GTL+) signaling

technology. This technology provides improved noise margins and reduced ringing

through low voltage swings and controlled edge rates. Platforms implement a

termination voltage level for GTL+ signals defined as V

. Because platforms implement

separate power planes for each processor (and chipset), separate V

and V

supplies

are necessary. This configuration allows for improved noise tolerance as processor

frequency increases. Speed enhancements to data and address busses have caused

signal integrity considerations and platform design methods to become even more

critical than with previous processor families.

The GTL+ inputs require a reference voltage (GTLREF) which is used by the receivers to

determine if a signal is a logical 0 or a logical 1. GTLREF must be generated on the

motherboard (see Table 14 for GTLREF specifications). Termination resistors (R

) for

GTL+ signals are provided on the processor silicon and are terminated to V

. Intel

chipsets will also provide on-die termination, thus eliminating the need to terminate the

bus on the motherboard for most GTL+ signals.

2.7.1 FSB Signal Groups

The front side bus signals have been combined into groups by buffer type. GTL+ input

signals have differential input buffers, which use GTLREF[1:0] as a reference level. In

this document, the term “GTL+ Input” refers to the GTL+ input group as well as the

GTL+ I/O group when receiving. Similarly, “GTL+ Output” refers to the GTL+ output

group as well as the GTL+ I/O group when driving.

With the implementation of a source synchronous data bus comes the need to specify

two sets of timing parameters. One set is for common clock signals which are

dependent upon the rising edge of BCLK0 (ADS#, HIT#, HITM#, etc.) and the second

set is for the source synchronous signals which are relative to their respective strobe

lines (data and address) as well as the rising edge of BCLK0. Asychronous signals are

still present (A20M#, IGNNE#, etc.) and can become active at any time during the

clock cycle. Table 8 identifies which signals are common clock, source synchronous,

and asynchronous.

Table 8. FSB Signal Groups (Sheet 1 of 2)

Signal Group Type Signals

GTL+ Common

Clock Input

Synchronous to

BCLK[1:0]

BPRI#, DEFER#, RESET#, RS[2:0]#, TRDY#

GTL+ Common

Clock I/O

Synchronous to

BCLK[1:0]

ADS#, BNR#, BPM[5:0]#, BR0#, DBSY#, DRDY#,

HIT#, HITM#, LOCK#

GTL+ Source

Synchronous I/O

Synchronous to

assoc. strobe

GTL+ Strobes

Synchronous to

BCLK[1:0]

ADSTB[1:0]#, DSTBP[3:0]#, DSTBN[3:0]#

Signals Associated Strobe

REQ[4:0]#, A[16:3]#

ADSTB0#

A[35:17]#

ADSTB1#

D[15:0]#, DBI0# DSTBP0#, DSTBN0#

D[31:16]#, DBI1# DSTBP1#, DSTBN1#

D[47:32]#, DBI2# DSTBP2#, DSTBN2#

D[63:48]#, DBI3# DSTBP3#, DSTBN3#

1 2 ... 20 21 22 23 24 25 26 27 28 29 30 ... 117 118

Commenti su questo manuale

Nessun commento

Sears 917.257552 manuels

Manuels d'utilisation et guides de l'utilisateur pour Matériel de jardinage Sears 917.257552.
Nous fournissons des manuels en pdf 1 Sears 917.257552 à télécharger gratuitement par type de document : Manuel de l'utilisateur

Modèles	Type de document
917.299642	Manuel de l'utilisateur Sears 917.299642 User Manual, 36 pages
917.372851	Manuel de l'utilisateur Sears 917.372851 User Manual, 28 pages
247.38824	Manuel de l'utilisateur Sears 247.38824 User Manual, 44 pages
917.25597	Manuel de l'utilisateur Sears 917.25597 User Manual, 56 pages
917.25591	Manuel de l'utilisateur Sears 917.25591 User Manual, 48 pages
EZ3 917.38713	Manuel de l'utilisateur Sears EZ3 917.38713 User Manual [fr] , 22 pages
917.257643	Manuel de l'utilisateur Sears 917.257643 User Manual, 56 pages
917.25559	Manuel de l'utilisateur Sears 917.25559 User Manual, 52 pages
247.8809	Manuel de l'utilisateur Sears 247.8809 User Manual, 18 pages
917.257632	Manuel de l'utilisateur Sears 917.257632 User Manual, 56 pages
EZ3 917.256543	Manuel de l'utilisateur Sears EZ3 917.256543 User Manual, 28 pages
917.271051	Manuel de l'utilisateur Sears 917.271051 User Manual, 60 pages
917386121	Manuel de l'utilisateur Sears 917386121 User Manual, 24 pages
917.383223	Manuel de l'utilisateur Sears 917.383223 User Manual, 24 pages
917.38783	Manuel de l'utilisateur Sears 917.38783 User Manual, 22 pages
917.251551	Manuel de l'utilisateur Sears 917.251551 User Manual, 60 pages
917.257462	Manuel de l'utilisateur Sears 917.257462 User Manual, 52 pages
917.25545	Manuel de l'utilisateur Sears 917.25545 User Manual, 26 pages
917.25051	Manuel de l'utilisateur Sears 917.25051 User Manual, 64 pages
502.25502	Manuel de l'utilisateur Sears 502.25502 User Manual, 32 pages

Intel SLA9X Scheda Tecnica Pagina 25

Commenti su questo manuale

Sears 917.257552 manuels

Sears 917.257552 Manuel de l'utilisateur (56 pages)

Table des matières

Plus de produits et de manuels pour Matériel de jardinage Sears

Intel SLA9X Scheda Tecnica Pagina 25

Commenti su questo manuale

Prodotti e manuali riguardandi Processori Intel SLA9X

Sears 917.257552 manuels

Sears 917.257552 Manuel de l'utilisateur (56 pages)

Table des matières

Plus de produits et de manuels pour Matériel de jardinage Sears