The STX Interface supports two modes of digital flat panel interface – 24-bit and 12-bit. It allows to use the different types of graphics controllers on the STX Module. STX flat panel interface is compatible with the Silicon Image's SiI154 and SiI164 PanelLink transmitters that can be used to drive the flat panels with TMDS interface.
Flat panel interface mode in use is indicated by FP_BSEL signal. The pixel data mapping in both 24-bit and 12-bit modes is described in the following table. Flat Panel Pixel Data Mapping
Flat Panel
Data Signal | 24-bit Mode
(Pixel Data) | 12-bit Mode
(Low/High Half of Pixel Data) |
| FP_D23 | R7 | — |
| FP_D22 | R6 | — |
| FP_D21 | R5 | — |
| FP_D20 | R4 | — |
| FP_D19 | R3 | — |
| FP_D18 | R2 | — |
| FP_D17 | R1 | — |
| FP_D16 | R0 | — |
| FP_D15 | G7 | — |
| FP_D14 | G6 | — |
| FP_D13 | G5 | — |
| FP_D12 | G4 | — |
| FP_D11 | G3 | G3/R7 |
| FP_D10 | G2 | G2/R6 |
| FP_D9 | G1 | G1/R5 |
| FP_D8 | G0 | G0/R4 |
| FP_D7 | B7 | B7/R3 |
| FP_D6 | B6 | B6/R2 |
| FP_D5 | B5 | B5/R1 |
| FP_D4 | B4 | B4/R0 |
| FP_D3 | B3 | B3/G7 |
| FP_D2 | B2 | B2/G6 |
| FP_D1 | B1 | B1/G5 |
| FP_D0 | B0 | B0/G4 |
Additional Info
R, G, B denotes red, green, and blue color pixel components. Bit significance within a color is defined by number (7 denotes MSB). When modes with color depth less than 8 bit is used, LSB pixel bits are driven low.
The FP_DSEL signal defines single or dual clock mode used in 12-bit mode. The FP_EDGE selects an active edge of the clock signal. See following tables for definition of the clock edge used for pixel data sampling in different modes.
Sampling Edge in 24-bit Mode (FP_BSEL=1)
| FP_DSEL | FP_EDGE | 24-bit Pixel Data |
| 0 | 0 | FP_CLK_P falling edge |
| 0 | 1 | FP_CLK_P rising edge |
| 1 | 0 | — |
| 1 | 1 | — |
Sampling Edge in 12-bit Mode (FP_BSEL=0)
| FP_DSEL | FP_EDGE | Low Half of Pixel Data | High Half of Pixel Data |
| 0 | 0 | FP_CLK_P falling edge | FP_CLK_S falling edge |
| 0 | 1 | FP_CLK_P rising edge | FP_CLK_S rising edge |
| 1 | 0 | FP_CLK_P falling edge | FP_CLK_P rising edge |
| 1 | 1 | FP_CLK_P rising edge | FP_CLK_P falling edge |
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