82598EB Datasheet, PDF (28/596 Pages) Intel Corporation – Intel® 82598EB 10 Gigabit Ethernet Controller Datasheet

Intel^® 82598EB 10 GbE Controller - SMBus and NC-SI Signals
FLSH_SCK
B9
FLSH_CE_
B8
N
T/s
Flash serial clock that operates at a maximum of 20 MHz.
T/s
Flash chip select output.
2.5
SMBus and NC-SI Signals
Table 2-7. SMBus Signals
Signal
SMBCLK
SMBD
Pin
Number
Type
AJ27
O/d
AH28
O/d
SMBALRT_N
AE3
O/d
Name and Function
SMBus Clock. One clock pulse is generated for each data bit transferred.
SMBus Data. Stable during the high period of the clock (unless it is a start or
stop condition).
SMBus Alert. Acts as an interrupt pin of a slave device on the SMBus.
Note: If the SMBus is disconnected, an external pull-up should be used for SMBCLK and SMBD pins.
For suggested pull-up resistor values, refer to Section 2.13.
Table 2-8. NC-SI Signals
Symbol
Pin
Number
Type
NCSI_CLK_IN
B20
NCSI-In
NCSI_CRS_DV
A19
NCSI_RXD_0
B18
NCSI_RXD_1
B19
NCSI_TX_EN
A17
NCSI_TXD_0
A20
NCSI_TXD_1
A18
NCSI-Out
NCSI-Out
NCSI-In
NCSI-In
Name and Function
NC-SI Reference Clock Input. Synchronous clock reference for receive,
transmit, and control interface. It is a 50 MHz clock/- 50 ppm.
CRS/DV. Carrier sense/receive data valid.
Receive Data. Data signals to the BMC.
Transmit Enable.
Transmit Data. Data signals from the BMC.
Note:
If NC-SI is disconnected, an external pull-up resistor should be connected to the
NCSI_TXD[1:0] and an external pull down resistor should be connected to the NCSI_CLK_IN
and NCSI_TX_EN pins. For suggested pull-up/pull-down values, refer to Section 2.13.
For more information on management interfaces, refer Section 5..
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