
30 Board Interfaces
Table 4-4: P4 Connector Signal Descriptions
Signal I/O Description
NB_REAR-RX[P/N]1 I Node B PCIe port1 receive lan from backplane to PCH
NB_REAR-TX[P/N]1 O Node B PCIe port1 transmit lan from PCH to backplane
NB_REAR-RX[P/N]2 I Node B PCIe port2 receive LAN from backplane to PCH
NB_REAR-TX[P/N]2 O Node B PCIe port2 transmit LAN from PCH to backplane
NB_REAR_GPIO[0:7] I/O Node B General Purpose IO, Channels 0-7
NB_USB3_RX_2[P/N] I Node B USB 3.0 port receive lane from backplane to PCH
NB_USB3_TX_2[P/N] O Node B USB 3.0 port transmit lane from PCH to backplane
NB_USB3_RX_5[P/N] I Node B USB 3.0 port receive lane from backplane to PCH
NB_USB3_TX_5[P/N] O Node B USB 3.0 port transmit lane from PCH to backplane
NB_RTM_BOOT# I Node B boot up from RTM BIOS when this pin pull low
NB_EXT_NODE_RST I Node B reset input
NB_SATA_RX[P/N]3 I Node B SATA 6Gb/s port receive lane from backplane to PCH
NB_SATA_TX[P/N]3 O Node B SATA 6Gb/s port transmit lane from PCH to backplane
NB_SPI_* I/O Node B SPI bus for RTM BIOS
NB_LPC_* I/O Node B LPC bus for RTM debug port
NB_MSCLK I/O Node B PS2 bus mouse signal clock
NB_MSDATA I/O Node B PS2 bus mouse signal data
NB_KBCLK I/O Node B PS2 bus keyboard signal clock
NB_KBDATA I/O Node B PS2 bus keyboard signal data
MX[A:D]0-[P/N] I/O Node A 1Gb BASE-T Ethernet
MX[A:D]1-[P/N] I/O Node B 1Gb BASE-T Ethernet
NA_GLAN_KX[R/
T]0_[P/N]
I/O Node A 1Gb BASE-KX Ethernet
NB_GLAN_KX[R/
T]0_[P/N]
I/O Node B 1Gb BASE-KX Ethernet
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