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DVI provide one TMDS clock pair and 3 TMDS data pairs in single link mode or 6 TMDS data pairs in dual link mode. TMDS data pairs operate at a gross bit rate that is 10 times the frequency of the TMDS clock. In each TMDS clock period there is a 10-bit symbol per TMDS data pair representing 8-bits of pixel color.
Schematic of a TMDS link used as a link for digital component video data (RGB) between a video controller (PC) and a display controller (Monitor) in interfaces such as DVI or HDMI Transition-minimized differential signaling ( TMDS ) is a technology for transmitting high-speed serial data used by the DVI [ 1 ] and HDMI video interfaces, as well ...
DFP was superseded by DVI because DFP, like P&D, is limited to a single-link TMDS signal. In contrast, DVI is capable of higher maximum resolutions because it supports a dual-link TMDS signal; in addition, DVI also supports analog video, which makes the VGA connector redundant.
The original FPD-Link designed for 18-bit RGB video has 3 parallel data pairs and a clock pair, so this is a parallel communication scheme. However, each of the 3 pairs transfers 7 serialized bits during each clock cycle. So the FPD-Link parallel pairs are carrying serialized data, but use a parallel clock to recover and synchronize the data.
HDMI 1.0 allows a maximum TMDS clock of 165 MHz (4.95 Gbit/s bandwidth per link), the same as DVI. It defines two connectors called type A and type B, with pinouts based on the Single-Link DVI-D and Dual-Link DVI-D connectors respectively, though the type B connector was never used in any commercial products.
TMDS Data2 + 2 TMDS Data2 - 3 TMDS Data2 return 4 Horizontal & Vertical sync return Not used 5 Horizontal sync / Composite sync Not used 6 Vertical sync Not used 7 TMDS Clock return 8 General purpose, fourth make Charge power + 9 General purpose, third make 1394 pair A, data - 10 1394 pair A, data + 11 TMDS Data1 + 12 TMDS Data1 - 13
DisplayPort displays use one TMDS/DisplayPort transmitter and no clock signal. An active DisplayPort adapter can convert a DisplayPort signal to another type of signal—like VGA, single-link DVI, or dual-link DVI; or HDMI if more than two non-DisplayPort displays must be connected to a Radeon HD 5000 series graphics card. [7]
2 = TMDS (generic) 3 = RSDS (generic) 4 = DVI-D 5 = DVI-I, analog 6 = DVI-I, digital 7 = HDMI-A 8 = HDMI-B (dual link) 9 = MDDI 10 = DisplayPort 11 = Proprietary digital interface. 4 Interface Standard Version and Revision Bits 3:0: Interface revision Bits 7:4: Interface version 5 Color Depth Support, RGB encoding Bit 0: 6 bpc Bit 1: 8 bpc Bit ...