Unified Display Interface
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| Unified Display Interface | ||
|---|---|---|
| Type | Digital video connector | |
| Production history | ||
| Designer | Unified Display Interface Work Group | |
| Designed | 2006 | |
| Produced | 2006 | |
| Specifications | ||
| Length | 18.8 mm | |
| Width | 12.5 mm | |
| Height | 3.7 mm | |
| Hot plugable | yes | |
| External | yes | |
| Max voltage | +5V | |
| Max current | 0.5 A | |
| Audio signal | No | |
| Video signal | Yes | |
| Data signal | R,G,B data + clock and display data channel (TDMS) | |
| Width | 36 bit (maximum) | |
| Bandwidth | 16 Gbps | |
| Pins | 26 | |
| Pin out | ||
| Pin 1 | Supply voltage for data link circutry | VDD_UDL |
| Pin 2 | Supply voltage for data link circutry | VDD_UDL |
| Pin 3 | Supply voltage for data link circutry | VDD_UDL |
| Pin 4 | Supply voltage for data link circutry | VDD_UDL |
| Pin 5 | Supply return for control and data link power | VSS |
| Pin 6 | Supply return for control and data link power | VSS |
| Pin 7 | Supply return for control and data link power | VSS |
| Pin 8 | Supply return for control and data link power | VSS |
| Pin 9 | Positive side of UDI lane 0 data (userd for x1 and x3 lane widths) | UDI_Data0+ |
| Pin 10 | Negative side of UDI lane 0 data (userd for x1 and x3 lane widths) | UDI_Data0- |
| Pin 11 | Shield for UDI_Data0[-/-] | GND |
| Pin 12 | Positive side of UDI lane 1 data (userd for x1 and x3 lane widths) | UDI_Data1+ |
| Pin 13 | Negative side of UDI lane 1 data (userd for x1 and x3 lane widths) | UDI_Data1- |
| Pin 14 | Shield for for UDI_Data1[-/-] | Ground |
| Pin 15 | Positive side of UDI lane 2 data (userd for x1 and x3 lane widths) | UDI_Data2+ |
| Pin 16 | Negative side of UDI lane 1 data (userd for x1 and x3 lane widths) | UDI_Data2- |
| Pin 17 | Shield for for UDI_Data2[-/-] | GND |
| Pin 18 | Reserved connector pin. No cable connection | (NC) |
| Pin 19 | Reserved connector pin. No cable connection | (NC) |
| Pin 20 | Reserved connector pin. No cable connection | (NC) |
| Pin 21 | (Test Pin) | |
| Pin 22 | Ground return | GND |
| Pin 23 | Supply voltage for control link signals | UDI_EPwr |
| Pin 24 | UDI control link clock | UDI_CtrlClk |
| Pin 25 | UDI Control link data | UDI_CtrlData |
| Pin 26 | UDI link hot-plug detect | UDI_HPD |
Unified Display Interface (UDI) is an improved digital video interface specification based on the existing DVI interface. It is intended to be a lower-cost implementation while providing compatibility with existing HDMI and DVI displays. It provides higher bandwidth than previous digital ports (up to 16 Gb/s in its first version compared to 5 Gb/s for HDMI) and includes a form of Digital Rights Management (DRM) known as HDCP.
UDI is specifically targeted towards the needs of computer monitor and video card manufacturers, as opposed to HDMI which is aimed at high-definition multimedia consumer electronics devices such as television monitors and DVD players.
The connector has a single row of 26 contacts pitched 0.6 mm apart from each other, looking very similar to the Intel-initiated USB plug which has a single row with only 4 contacts. 3 of the 26 contacts will not be wired but are reserved for undetermined future upgrade possibilities. Transmit and receive plugs are slightly different, and a UDI cable will fit only one way. Bidirectional communication works at a much lower data rate than available for the single direction video datastream.
On December 20, 2005, the UDI Special Interest Group (UDI SIG) was announced. They worked on determining the refined specifications and promoting the interface. Members include Silicon Image Inc., Intel, Apple Computer, LG, Samsung and NVIDIA.
The final specification was finalized in July 2006. The differences between UDI and HDMI will be kept to a minimum, as both specifications will be aligned for long-term compatibility.
DisplayPort is a competing standard which is also under development.
[edit] External links
[edit] News
- Unified Display Interface Nears Release. DailyTech (2006-07-03). Retrieved on 2006-08-15.
- Next-gen display standard emerges for PC, HDTVs. EETimes (2005-12-20). Retrieved on 2006-08-15.
- Industry group promotes UDI as successor of VGA graphical interface. TG Daily (2005-12-20). Retrieved on 2006-08-15.
| Audio and video connectors |
|---|
| Single conductor: Binding post | Banana plug | Fahnestock clip |
| Audio: RCA | Jack plug | XLR | DIN / Mini-DIN | BNC | DB25 | Speakon | TosLink |
| Video: DVI / Mini-DVI / UDI | RCA | VGA / Mini-VGA | DFP | P&D | BNC | DIN / Mini-DIN | 13W3 | D4 | DisplayPort |
| Multi: ADC | HDMI | TRS | SCART | F | Belling-Lee | DisplayPort |
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