Data Sheet

Ethernet Controller I210 —Pin Interface
22
2.2 Pull-Up/Pull-Down Resistors
Table 2-1 lists internal and external pull-up/pull-down resistors and their functionality in different
device states.
• As stated in the name and function table columns, the internal Pull-Up/Pull-Down (PU/PD) resistor
values are 30 K ± 50%.
• Only relevant (digital) pins are listed; analog or bias and power pins have specific considerations
listed in Chapter 11.0.
Note: Refer to Section 12.0 for a list of board design schematic checklists, layout checklists, and
reference design schematics for more details.
The device states are defined as follows:
• Power-up = while 3.3V is stable, yet 1.0V isn’t
• Active = normal mode (not power up or disable)
• Disable = device off or dynamic device off – refer to Section 4.3.3
Table 2-1. Pull-Up/Pull-Down Resistors
Signal Name Power Up
1
Active Disable
2
External
PU Comments PU Comments PU Comments
LAN_PWR_GOOD N N N Y
PE_WAKE_N N N N Y
PE_RST_N N N N PU
3
NVM_SI N N Y PD/PU
4
NVM_SO Y Y Y N
NVM_SK Y N Y N
NVM_CS_N Y N Y N
SMBD N N N Y
SMBCLK N N N Y
SMBALRT_N N N N Y
NCSI_CLK_IN N HiZ N N PD
NCSI_CRS_DV N HiZ N N PD
NCSI_RXD[1:0] N HiZ N N PU
NCSI_TX_EN N HiZ N N PD
NCSI_TXD[1:0] N HiZ N N PU
NCSI_ARB_OUT N N N
Stable high
output
N
NCSI_ARB_IN N HiZ N
5
N
5
N
SDP0 Y Y
Until Flash auto-
load done
Y
Might keep
state by Flash
control
N
SDP1 Y Y
Until Flash auto-
load done
Y
Might keep
state by Flash
control
N
SDP2 Y Y
Until Flash auto-
load done
Y
Might keep
state by Flash
control
N