Specification Clarifications; Expansion Slots - Intel D845EPI Specification

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Intel Desktop Board D845EPI Specification Update

SPECIFICATION CLARIFICATIONS

The Specification Clarifications listed in this section apply to the Desktop Board D845PESV Technical
Product Specification (Order Number C46810). All Specification Clarifications will be incorporated into a
future version of that specification.
1. Clarification of SMBus Routing
Section 2.8.2.1 will change in its entirety as follows:
2.8.2.1

Expansion Slots

The Desktop Board has three PCI rev 2.2 compliant local bus slots. The SMBus
is routed to PCI bus connector 2.
✏
NOTE
The SMBus routing to the PCI bus connectors does not conform to the PCI
Engineering Change Notice (ECN) "Addition of the SMBus to the PCI Connector
ECN", dated October 5th, 2000. The ECN specifies that SMBus signals must be
routed to all PCI bus connectors. On this board, SMBus signals are routed to
PCI bus connector 2 only.
Add-in cards that implement PCI bus connector pins A40 and A41 for any
purpose other than SMBCLK (SMBus clock) and SMBDAT (SMBus data) should
not be installed in PCI bus connector 2.
For information about
Addition of the SMBus to the PCI Connector ECN
✏
NOTE
This document references back-panel slot numbering with respect to processor
location on the Desktop Board. PCI slots are identified as PCI slot #x, starting
with the slot closest to the processor. The ATX/microATX specifications identify
expansion slot locations with respect to the far edge of a full-sized ATX chassis.
The ATX specification and the Desktop Board's silkscreen are opposite and
could cause confusion. The ATX numbering convention is made without respect
to slot type, but refers to an actual slot location on a chassis. Figure 6 on
page 49 illustrates the Desktop Board's PCI slot numbering.
6
Refer to
http://www.pcisig.com/data/s
pecifications/smb_ecn_0405
01.pdf