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DS90CF383 LVDS color bit mapping 24 bit LDI to 24 bit VESA

Michael Korejwo1
Prodigy 10 points
Other Parts Discussed in Thread: DS90CF383B, DS90CF383, DS92LV0422, DS92LV0421, DS92LV0412, DS92LV0411, DS90UH928Q, DS90UB927Q, DS90UB928Q

There are two 24-bit color mapping formats, LDI and VESA. Our PCB is designed for LDI. Does a variant of the DS90CF383B exists that remaps TxIN[28..1] so that this conversion occurs in the serializer? For example one PWA that uses LVDS in the LDI color mapping format would be populated with DS90CF383B and another PWA that uses LVDS VESA color mapping format would be populated with DS90CF???.

Such a part would pin-out like column 2. At the bottom of the table a list of LDI>VESA is listed.

Pin # DS90CFnnn
Pin-Signal		 DS90CD383
Pin-Signal		 24-bit LDI 24-bit VESA
2 TxIN6 TxIN5 RED_1 RED_7       Cycle      
3 TxIN3 TxIN6 RED_7 RED_5    
4 TxIN10 TxIN7 GREEN_2 GREEN_0
6 TxIN11 TxIN8 GREEN_3 GREEN_1   DS90CF383B            
7 TxIN7 TxIN9 GREEN_4 GREEN_2                
8 TxIN13 TxIN10 GREEN_0 GREEN_6  
10 TxIN14 TxIN11 GREEN_1 GREEN_7   LVDS_TX0 Pin 4 3 56 55 54 52 51
11 TxIN8 TxIN12 GREEN_5 GREEN_3     DS90CFnnn_TxOUT0 TxIN10 TxIN3 TxIN2 TxIN1 TxIN0 TxIN5 TxIN27
12 TxIN9 TxIN13 GREEN_6 GREEN_4     DS90CF383_TxOUT0 TxIN7 TxIN6 TxIN4 TxIN3 TxIN2 TxIN1 TxIN0
14 TxIN12 TxIN14 GREEN_7 GREEN_5     24-bit LDI format GREEN_2 RED_7 RED_6 RED_5 RED_4 RED_3 RED_2
15 TxIN16 TxIN15 BLUE_2 BLUE_0   24-bit VESA format GREEN_0 RED_5 RED_4 RED_3 RED_2 RED_1 RED_0
16 TxIN21 TxIN16 BLUE_0 BLUE_6  
18 TxIN22 TxIN17 BLUE_1 BLUE_7   LVDS_TX1 Pin 19 15 14 12 11 7 6
19 TxIN17 TxIN18 BLUE_3 BLUE_1     DS90CFnnn_TxOUT0 TxIN17 TxIN16 TxIN12 TxIN9 TxIN8 TxIN7 TxIN11
20 TxIN15 TxIN19 BLUE_4 BLUE_2     DS90CF383_TxOUT1 TxIN18 TxIN15 TxIN14 TxIN13 TxIN12 TxIN9 TxIN8
22 TxIN18 TxIN20 BLUE_5 BLUE_3     24-bit LDI format BLUE_3 BLUE_2 GREEN_7 GREEN_6 GREEN_5 GREEN_4 GREEN_3
23 TxIN19 TxIN21 BLUE_6 BLUE_4   24-bit VESA format BLUE_1 BLUE_0 GREEN_5 GREEN_4 GREEN_3 GREEN_2 GREEN_1
24 TxIN20 TxIN22 BLUE_7 BLUE_5  
25 TxIN23 TxIN23 GND NA   LVDS_TX2 Pin 30 28 27 24 23 22 20
27 TxIN24 TxIN24 HSYNC HSYNC     DS90CFnnn_TxOUT0 TxIN26 TxIN25 TxIN24 TxIN20 TxIN19 TxIN18 TxIN15
28 TxIN25 TxIN25 VSYNC VSYNC     DS90CF383_TxOUT2 TxIN26 TxIN25 TxIN24 TxIN22 TxIN21 TxIN20 TxIN19
30 TxIN26 TxIN26 DEN DEN     24-bit LDI format DEN VSYNC HSYNC BLUE_7 BLUE_6 BLUE_5 BLUE_4
50 TxIN4 TxIN27 RED_0 RED_6   24-bit VESA format DEN VSYNC HSYNC BLUE_5 BLUE_4 BLUE_3 BLUE_2
51 TxIN27 TxIN0 RED_2 RED_0  
52 TxIN5 TxIN1 RED_3 RED_1   LVDS_TX3 Pin 25 18 16 10 8 2 50
54 TxIN0 TxIN2 RED_4 RED_2     DS90CFnnn_TxOUT0 TxIN23 TxIN22 TxIN21 TxIN14 TxIN13 TxIN6 TxIN4
55 TxIN1 TxIN3 RED_5 RED_3     DS90CF383_TxOUT3 TxIN23 TxIN17 TxIN16 TxIN11 TxIN10 TxIN5 TxIN27
56 TxIN2 TxIN4 RED_6 RED_4     24-bit LDI format GND BLUE_1 BLUE_0 GREEN_1 GREEN_0 RED_1 RED_0
24-bit VESA format NA BLUE_7 BLUE_6 GREEN_7 GREEN_6 RED_7 RED_6
LDI VESA
7 5
6 4
5 3
4 2
3 1
2 0
1 7
0 6
  • 0
    TI__Expert 3050 points

    Hi Michael,

    I don't believe any of our generation I products have a map select feature to allow for switching between formats.

    Some of our generation II products have the ability to do change the LVDS mapping to support LSBs or MSB on LVDS channel 3.

    For example:

    Channel Link II (industrial):

    • DS92LV0421, DS92LV0422
    • DS92LV0411, DS92LV0412

    FPD-Link II (automotive):

    • DS90UR907Q, DS90UR908Q

    FPD-Link III (automotive):

    • DS90UH927Q, DS90UH928Q
    • DS90UB927Q, DS90UB928Q

    Mike Wolfe

    DPS APPS / SVA