If the graphics option is included in the slot load Xserve configuration, the external monitor connector is a DVI-I connector that carries both digital and analog video signals. Figure 3-6 shows the contact configuration. Table 3-9 and Table 3-10 list the signals and pin assignments.
Figure 3-6 DVI-I connector
![[image: ../art/q28_12.gif]](../art/q28_12.gif)
Table 3-9 Main signals on the DVI-I connector
| Pin | Signal name | Pin | Signal name | ||
|---|---|---|---|---|---|
| 1 | TMDS Data2– | 13 | TMDS Data3+ | ||
| 2 | TMDS Data2+ | 14 | +5V Power | ||
| 3 | TMDS Data2/4 Shield | 15 | Ground for +5V Power | ||
| 4 | TMDS Data4– | 16 | Hot Plug Detect | ||
| 5 | TMDS Data4+ | 17 | TMDS Data0– | ||
| 6 | DDC Clock | 18 | TMDS Data0+ | ||
| 7 | DDC Data | 19 | TMDS Data0/5 Shield | ||
| 8 | Analog Vertical Sync | 20 | TMDS Data5– | ||
| 9 | TMDS Data1– | 21 | TMDS Data5+ | ||
| 10 | TMDS Data1+ | 22 | TMDS Clock Shield | ||
| 11 | TMDS Data1/3 Shield | 23 | TMDS Clock+ | ||
| 12 | TMDS Data3– | 24 | TMDS Clock– |
Table 3-10 MicroCross signals on the DVI-I connector
| Pin | Signal name |
|---|---|
| C1 | Analog Red Video |
| C2 | Analog Green Video |
| C3 | Analog Blue Video |
| C4 | Analog Horizontal Sync |
| C5 | Analog Common Ground Return |
The graphics data sent to the digital monitor use transition minimized differential signaling (TMDS). TMDS uses an encoding algorithm to convert bytes of graphics data into characters that are transition-minimized to reduce EMI with copper cables, and DC-balanced for transmission over fiber optic cables. The TMDS algorithm also provides robust clock recovery for greater skew tolerance with longer cables or low-cost short cables. For additional information about TMDS, see the references shown in “Digital Visual Interface”.