Pci Express® Interfaces; X 16 Lane Interface For External Graphics (Not Applicable To The Rs690Mc); A-Link Express Ii To Southbridge; X 1 Lane Interface For General Purpose External Devices - AMD RS690M Technical Reference Manual

PCI Express® Interfaces
®
3.5 PCI Express Interfaces
3.5.1

1 x 16 Lane Interface for External Graphics (Not Applicable to the RS690MC)

Table 3-3 1 x 16 Lane PCI Express Interface for External Graphics

Pin Name
GFX_TX[15:0]P,
GFX_TX[15:0]N
GFX_RX[15:0]P,
GFX_RX[15:0]N
GFX_REFCLKP,
GFX_REFCLKN
*Note: The RS690T supports an external graphics card through an 8-lane interface, thus GFX_TX[15:8]P/N and GFX_RX[15:8]P/N do not
exist on the RS690T
3.5.2

A-Link Express II to Southbridge

Table 3-4 1 x 4 Lane A-Link Express II Interface for Southbridge

Pin Name
SB_TX[3:0]P,
SB_TX[3:0]N
SB_RX[3:0]P,
SB_RX[3:0]N
SB_CLKP,
SB_CLKN
3.5.3

4 x 1 Lane Interface for General Purpose External Devices

Table 3-5 4 x 1 Lane PCI Express
Pin Name
GPP_TX[3:0]P,
GPP_TX[3:0]N
GPP_RX[3:0]P,
GPP_RX[3:0]N
3.5.4 Miscellaneous PCI Express
Table 3-6 PCI Express
Pin Name
PCE_CALRN
PCE_CALRP
© 2008 Advanced Micro Devices, Inc.
Proprietary
Power Ground
Type
Domain Domain
O VDD_PCIE VSS_PCIE
I VDD_PCIE VSS_PCIE
I VDD_PCIE VSS_PCIE
Power Ground
Type
Domain Domain
O VDD_PCIE VSS_PCIE
I VDD_PCIE VSS_PCIE
I VDD_PCIE VSS_PCIE
®
Interface for General Purpose External Devices
Power Ground
Type
Domain Domain
O VDD_PCIE VSS_PCIE
I VDD_PCIE VSS_PCIE
®
Signals
®
Interface for Miscellaneous PCI Express
Power Ground
Type
Domain Domain
Other VDD_PCIE VSS_PCIE
Other VDD_PCIE VSS_PCIE
Integrated
Functional Description
Termination
50Ω between Transmit Data Differential Pairs. Connect to external connector for
complements an external graphics card on the motherboard (if implemented).
50Ω between Receive Data Differential Pairs. Connect to external connector for an
complements external graphics card on the motherboard (if implemented).
50Ω between Clock Differential Pairs. Connect to external clock generator when
complements an external graphics card is implemented.
Integrated
Functional Description
Termination
50Ω between Transmit Data Differential Pairs. Connect to the corresponding
complements Receive Data Differential pairs on the Southbridge.
50Ω between Receive Data Differential Pairs. Connect to the corresponding
complements Transmit Data Differential pairs on the Southbridge.
50Ω between Clock Differential Pair. Connect to an external clock generator on
complements the motherboard.
Integrated
Termination Functional Description
50Ω between Transmit Data Differential Pairs. Connect to external connectors on
complements the motherboard for add-in card or ExpressCard support.
50Ω between Receive Data Differential Pairs. Connect to external connectors on
complements the motherboard for add-in card or ExpressCard support.
®
Signals
Functional Description
RX Impedance Calibration. Connect to VDD_PCIE on the motherboard with an
external resistor of an appropriate value.
TX Impedance Calibration. Connect to GND on the motherboard with an external
resistor of an appropriate value.
41978 AMD RS690M Databook 3.06
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