45732 AMD 780E Databook 3.10
© 2009 Advanced Micro Devices, Inc.
3-10
Proprietary
TMDS Interface Multiplexed on the PCI Express® Graphics Lanes
3.9
TMDS Interface Multiplexed on the PCI Express
®
Graphics Lanes
The RS780E supports a dual-link TMDS interface, enabling DVI/HDMI™, which is multiplexed on the PCI-E external
graphics lanes.
HDMI is enabled only through the single-link mode.
Table 3-11, “TMDS Interface Multiplexed on the PCI Express®
Graphics Interface,”
shows the multiplexing relationships between the PCI-E external graphics signals and the TMDS
signals.
3.10
DisplayPort™ Interface
The RS780E supports a maximum two DisplayPort™ channels through signals multiplexed on the PCI-E graphics
interface. Different implementations are possible, depending on the system configuration.
Table 3-11
shows only one
possibility, which uses the lower eight lanes of the interface for two DisplayPort outputs. For more explanations, please
refer to
RS780 DisplayPort Implementation Details
(AN_RS780A5).
TXOUT_U1N
TX5M
O
VDDLT18
VSSLT
None
TMDS data channel 5 (-). The channel is only used
in DVI dual-link mode and is not used for HDMI
support.
TXOUT_U1P
TX5P
O
VDDLT18
VSSLT
None
TMDS data channel 5 (+). The channel is only used
in DVI dual-link mode and is not used for HDMI
support.
TXOUT_U2N
–
O
VDDLT18
VSSLT
None
Unused. NC.
TXOUT_U2P
–
O
VDDLT18
VSSLT
None
Unused. NC.
TXOUT_U3N
–
O
VDDLT18
VSSLT
None
Unused. NC.
TXOUT_U3P
–
O
VDDLT18
VSSLT
None
Unused. NC.
TXCLK_LN
TXCM
O
VDDLT18
VSSLT
None
TMDS clock channel (-)
TXCLK_LP
TXCP
O
VDDLT18
VSSLT
None
TMDS clock channel (+)
TXCLK_UN
–
O
VDDLT18
VSSLT
None
Unused. NC.
TXCLK_UP
–
O
VDDLT18
VSSLT
None
Unused. NC.
Table 3-11 TMDS Interface Multiplexed on the PCI Express
®
Graphics Interface
Pin Name
Ball
Reference TMDS Function
GFX_TX0P
A5
TX2P - 1st Link Red+
GFX_TX0N
B5
TX2M - 1st Link Red-
GFX_TX1P
A4
TX1P - 1st Link Green+
GFX_TX1N
B4
TX1M - 1st Link Green-
GFX_TX2P
C3
TX0P - 1st Link Blue+
GFX_TX2N
B2
TX0M- 1st Link Blue -
GFX_TX3P
D1
TXCP - Clock+
GFX_TX3N
D2
TXCM - Clock-
GFX_TX4P
E2
TX5P- 2nd Link Red+
GFX_TX4N
E1
TX5M - 2nd Link Red-
GFX_TX5P
F4
TX4P- 2nd Link Green+
GFX_TX5N
F3
TX4M - 2nd Link Green-
GFX_TX6P
F1
TX3P - 2nd Link Blue+
GFX_TX6N
F2
TX3M - 2nd Link Blue-
Table 3-10 LVTM Interface in TMDS Mode (Continued)
Pin Name
TMDS
Functional
Name
Type
Power
Domain
Ground
Domain
Integrated
Termination Functional Description