VIPER Technical Manual

Detailed hardware description

 

 

TFT panel data bit mapping to the VIPER
Panel data bus bit18-bit TFT12-bit TFT9-bit TFT

FPD 15

R5

R3

R2

FPD 14

R4

R2

R1

FPD 13

R3

R1

R0

FPD 12

R2

R0

-

FPD 11

R1

-

-

GND

R0

-

-

FPD 10

G5

G3

G2

FPD 9

G4

G2

G1

FPD 8

G3

G1

G0

FPD 7

G2

G0

-

FPD 6

G1

-

-

FPD 5

G0

-

-

FPD 4

B5

B3

B2

FPD 3

B4

B2

B1

FPD 2

B3

B1

B0

FPD 1

B2

B0

-

FPD 0

B1

-

-

GND

B0

-

-

 

 

 

 

The PXA255 cannot directly interface to 18-bit displays, as its colour palette RAM has 5 bits for red, 6 bits for green and 5 bits for blue, since the human eye can distinguish more shades of green than of red or blue.

© 2007 Eurotech Ltd Issue E

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