82598EB Datasheet, PDF (572/596 Pages) Intel Corporation – Intel® 82598EB 10 Gigabit Ethernet Controller Datasheet

Intel^® 82598EB 10 GbE Controller - NC-SI Electrical Interface Requirements
• NCSI_RXD_0/1: Pull-up resistors should always be used to ensure that these lines stay at a logic
high when nothing is driven, the interface is not used, and for multiple drop configurations.
• NCSI_TX_EN: A pull-down should always be used to ensure the Tx is never enabled during start-
up or when the signal is not driven.
• NCSI_TXD_0/1: Pull-up resistors should always be used to ensure that these lines stay at a logic
high when nothing is driven, the interface is not used, and for multiple drop configurations.
50 MHz
50 MHz Reference
Clock Buffer
REF_CLK
CRS_DV
DMTF Compliant
BMC Device
RXD_0
RXD_1
TX_EN
TXD_0
TXD_1
3.3 V dc
10 KΩ 10 KΩ 10 KΩ 10 KΩ
NCSI_CLK_IN (B5)
NCSI_CRS_DV (A4)
NCSI_RXD_0 (B7)
NCSI_RXD_1 (A6)
NCSI_TX_EN (B6)
NCSI_TXD_0 (B8)
NCSI_TXD_1 (A7)
82598
NC-SI
Interface
Signals
10 KΩ
10 KΩ 10 KΩ
Figure 8-2. NC-SI Connection Requirement - Single Drop Configuration
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