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LVDS
© 2009 Advanced Micro Devices, Inc.
45732 AMD 780E Databook 3.10
Proprietary
2-7
2.4
LVDS
The RS780E’s LVTM interface can operate as a dual-channel 18-/24-bit LVDS interface. Notice that for designs
implementing only a single LVDS channel, the LOWER channel of the interface should be used.
2.4.1 LVDS Data Mapping
Figure 2-6
shows the transmission ordering of the LVDS signals for 18-bit transmission on the lower and the upper data
channels. The signal mappings for single and dual channel transmission are shown in
Table 2-5
and
Table 2-6
respectively.
Figure 2-7
shows the transmission ordering of the LVDS signals for 24-bit transmission on the lower and the upper data
channels. The signal mappings for single and dual channel transmission are shown in
Table 2-9
and
Table 2-10
respectively.
Figure 2-6 Single/Dual Channel 18-bit LVDS Data Transmission Ordering
LP1C1
LP1C2
LP1C3
T Cycle
LP1C4
LP1C5
LP1C6
LP1C7
TXOUT_L0-/+
LP2C1
LP2C2
LP2C3
LP2C4
LP2C5
LP2C6
LP2C7
TXOUT_L1-/+
LP3C1
LP3C2
LP3C3
LP3C4
LP3C5
LP3C6
LP3C7
TXOUT_L2-/+
TXCLK_L-/+
UP1C1
UP1C2
UP1C3
T Cycle
UP1C4
UP1C5
UP1C6
UP1C7
TXOUT_U0-/+
UP2C1
UP2C2
UP2C3
UP2C4
UP2C5
UP2C6
UP2C7
TXOUT_U1-/+
UP3C1
UP3C2
UP3C3
UP3C4
UP3C5
UP3C6
UP3C7
TXOUT_U2-/+
TXCLK_U-/+