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FPDI [Flat Panel Display Interface] describes the electrical
layer, logical layer, and connector interface between flat panel displays
and display controllers in an integrated environment.
Also FPDI-1, used
with VGA [640 x 480] and SVGA [800 x 600]. FPDI was followed by FPDI-2;
FPDI is a VESA standard.
The FPDI standard was released around 1996 and
allows the integration between flat panel displays and graphics
controllers.
The FPDI [or FPDI-1] and FPDI-1B were replaced by FPDI-2 in
1998 [Flat Panel Display Interface -2].
Two types of connectors are defined; a 31 contact and 41 contact
connector.
The VGA interface uses 16-bits, while the SVGA interface uses
18-bits.
| Pin # | Signal name | Pin Function | Pin # | Signal name | Pin Function |
| 1 | GND | Ground | 17 | LDD9 | - |
| 2 | PCLK | - | 18 | LDD10 | - |
| 3 | LCLK | - | 19 | GND | Ground |
| 4 | FCLK | - | 20 | GND | Ground |
| 5 | GND | Ground | 21 | LDD0 | - |
| 6 | GND | Ground | 22 | LDD1 | - |
| 7 | LDD11 | - | 23 | LDD2 | - |
| 8 | LDD12 | - | 24 | LDD3 | - |
| 9 | LDD13 | - | 25 | LDD4 | - |
| 10 | LDD14 | - | 26 | GND | Ground |
| 11 | LDD15 | - | 27 | BIAS | - |
| 12 | GND | Ground | 28 | +5v | volts |
| 13 | LDD5 | - | 29 | +5V | volts |
| 14 | LDD6 | - | 30 | NC | No Connect |
| 15 | LDD7 | - | 31 | NC | No Connect |
| 16 | LDD8 | - | - | - | - |
Design hint; because the original FPDI interface has been replaced, it's obsolete.
IC Manufacturers
There may be companies still producing ICs, National was making a Graphics Companion Flat
Panel Display Controller.
However because of the age of the interface, vendors are no longer listed.
SVGA [Super Video Graphics Array]: Interface bus uses a 15-pin
D-sub connector. The table above provides the pinouts and signal names
for the connectors.
A 15-pin SVGA cable has the same pinout as a 15-pin
VGA cable; however, VGA may also be found with a 9-pin D connector.
The pin out and signal names for both a 9 pin and 15 D-sub connector is listed
on the VGA Bus page.
A listing on OEM D-sub connector manufacturers may be found on the D-Sub Connector Manufacturers page.
Some other video standards are listed below for reference.
DVI [Digital Visual Interface]: DVI interfaces are currently in full production and can handle digital or analog signals.
VGA [Video Graphics Array]: VGA
[1987] is a superset of EGA, incorporating all EGA modes.
Older displays prior to VGA sent digital signals to the monitor, while VGA and later versions send analog
signals.
The main PC Video Monitor Bus page, or to the main
PC Interface Bus page.
Use the Buses icon at the bottom of the page to reach the top level index
for all bus types.
Use the Equipment icon at the bottom of the page to reach manufacturers of PC Monitors.
All of the different interface Video buses deal with
layer 1 [Physical, Electrical and Mechanical Layer] of the OSI protocol stack.
Many pages also reference layer 2; the Data Link Layer [which provide bit/byte stuffing, checksum,
Protocols..].
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