Mini DVI
Mini-DVI is a space-saving variant of the Digital Visual Interface (DVI), which is mainly used by Apple . It maps DVI-I (Single Link) in a scaled-down form and is an alternative to Mini-VGA . Unlike Mini-VGA, Mini-DVI supports both analog and digital video signals, thus combining two established video interfaces in a small design. The mini-DVI connector is similar to the mini-VGA connector, but has four rows of pins instead of two.
The interface was found in the 12 " PowerBooks (G4, second version), the Intel-based iMacs 4.1-8.1 and the MacBooks 1.1-4.1 and 5.2, although the mini-DVI output of the Macbooks differs from that of the Powerbooks.
With adapters it is possible to use mini-DVI for DVI, VGA and TV signals. The adapter for TV (video and S-video) contains an IC for the DDC lines. The adapter for DVI cannot be used together with a DVI-to-VGA adapter, as the adapter only has a DVI-D instead of a DVI-I socket.
The DisplayPort or Mini DisplayPort specified in 2006 enables, among other things, higher bandwidths, copy protection and a return channel. Apple has been using it since October 2008. Both mini-DVI and mini-VGA have now largely been replaced by mini-display ports.
HDMI displays are compatible with DVI outputs using a simple adapter, but they do not support HDCP copy protection. B. is common with Blu-ray Discs . Protected media cannot be played via mini-DVI (and DVI at all) if the graphics card does not already support it. DVI then also does not provide an audio signal. Native HDMI outputs, on the other hand, as is now common in home entertainment, are still uncommon in notebooks and workstation computers, which should change with the spread of Blu-ray drives in such devices.
Specifications
| Pin code | Surname | Pin code | Surname | |
|---|---|---|---|---|
| 1 | Dat2_P | 17th | +5 V | |
| 2 | Dat2_N | 18th | DDC_DAT | |
| 3 | Dat1_P | 19th | free | |
| 4th | Dat1_N | 20th | BLUE | |
| 5 | Dat0_P | 21st | not installed | |
| 6th | Dat0_N | 22nd | GREEN | |
| 7th | CLK_P | 23 | not installed | |
| 8th | CLK_N | 24 | RED | |
| 9 | DGND | 25th | Detect | |
| 10 | DGND | 26th | DDC_CLK | |
| 11 | DGND | 27 | free | |
| 12 | DGND | 28 | DGND | |
| 13 | DGND | 29 | HSYNC | |
| 14th | DGND | 30th | DGND | |
| 15th | DGND | 31 | VSYNC | |
| 16 | DGND | 32 | DGND |
The adapter is recognized when pin 25 (Detect) is connected to pin 17 (+ 5V). The computer recognizes whether the video adapter ( Cinch and S-Video ) or a VGA device or a DVI device is connected and which settings (e.g. resolution) it supports by reading the EDID via the DDC . With VGA and DVI devices, the EDID is located in the device itself, with the video adapter (Cinch and S-Video), however, in the adapter.
Individual evidence
- ↑ http://developer.apple.com/legacy/mac/library/documentation/Hardware/Developer_Notes/Macintosh_CPUs-G4/12inchPowerBookG4/0_Preface/q54B_preface.html 12-inch Developer Notes (English)
