Arcom VIPER - Page 30

VIPER Detailed hardware description
Panel data bus bit 18-bit TFT 12-bit TFT 9-bit TFT
FPD 8 G3 G1 G0
FPD 7 G2 G0 NA
FPD 6 G1 NA NA
FPD 5 G0 NA NA
FPD 4 B5 B3 B2
FPD 3 B4 B2 B1
FPD 2 B3 B1 B0
FPD 1 B2 B0 NA
FPD 0 B1 NA NA
GND B0 NA NA
The PXA255 cannot directly interface to 18-bit displays, as its color palette RAM
has 5 bits of red, 6 bits of green, and 5 bits of blue, since the human eye can
distinguish more shades of green than of red or blue.
STN panel data bit mapping to the VIPER
Panel data bus Bit Dual scan color STN Single scan color STN Dual scan mono STN
FPD 15 DL6(G) NA NA
FPD 14 DL6(R) NA NA
FPD 13 DL5(B) NA NA
FPD 12 DL4(G) NA NA
FPD 11 DL3(R) NA NA
FPD 10 DL2(B) NA NA
FPD 9 DL1(G) NA NA
FPD 8 DL0(R) NA NA
FPD 7 DU7(G) D7(G) DL3
FPD 6 DU6(R) D6(R) DL2
FPD 5 DU5(B) D5(B) DL1
FPD 4 DU4(G) D4(G) DL0
FPD 3 DU3(R) D3(R) DU3
FPD 2 DU2(B) D2(B) DU2
FPD 1 DU1(G) D1(G) DU1
FPD 0 DU0(R) D0(R) DU0
© 2004 Arcom Issue H 30