Intel
®
E7520 Memory Controller Hub (MCH) Datasheet 29
Signal Description
2.6 PCI Express Interface Port B Signals
2.7 PCI Express Interface Port C Signals
Table 2-8. PCI Express Interface Port B Signals
Signal Name Type Description
EXP_B_TXP[7:0]
EXP_B_TXN[7:0]
O
DIFF
PCI Express Interface Port B Output (transmit) Data Pair (differential).
These signals are output (TX) from the MCH’s perspective, and should
be connected to the input (receive or RX) signals of the other PCI
Express* device.
Note that the signals for this x8 interface (EXP_B_TX*[7:0]) can be split
into two x4 interfaces:
• EXP_B_TX*[3:0] -> EXP_B0_TX*[3:0]
• EXP_B_TX*[7:4] -> EXP_B1_TX*[3:0]
EXP_B_RXP[7:0]
EXP_B_RXN[7:0]
I
DIFF
PCI Express Interface Port B Input (receive) Data Pair (differential).
These signals are input (RX) from the MCH’s perspective, and should be
connected to the output (transmit or TX) signals of the other PCI
Express* device.
Note that the signals for this x8 interface (EXP_B_RX*[7:0]) can be split
into two x4 interfaces:
• EXP_B_RX*[3:0] -> EXP_B0_RX*[3:0]
• EXP_B_RX*[7:4] -> EXP_B1_RX*[3:0]
Table 2-9. PCI Express Interface Port C Signals
Signal Name Type Description
EXP_C_TXP[7:0]
EXP_C_TXN[7:0]
O
DIFF
PCI Express Interface Port C Output (transmit) Data Pair (differential).
These signals are output (TX) from the MCH’s perspective, and should
be connected to the input (receive or RX) signals of the other PCI
Express* device.
Note that the signals for this x8 interface (EXP_C_TX*[7:0]) can be split
into two x4 interfaces:
• EXP_C_TX*[3:0] -> EXP_C0_TX*[3:0]
• EXP_C_TX*[7:4] -> EXP_C1_TX*[3:0]
EXP_C_RXP[7:0]
EXP_C_RXN[7:0]
I
DIFF
PCI Express* Interface Port C Input (receive) Data Pair (differential).
These signals are input (RX) from the MCH’s perspective, and should be
connected to the output (transmit or TX) signals of the other PCI
Express* device.
Note that the signals for this x8 interface (EXP_C_RX*[7:0]) can be split
into two x4 interfaces:
• EXP_C_RX*[3:0] -> EXP_C0_RX*[3:0]
• EXP_C_RX*[7:4] -> EXP_C1_RX*[3:0]