EL640.480-A SB Series Operations Manual (020-0358-00A)
8
Display Features
The EL640.480-A SB series displays are timing and pin compatible with the
feature connector on VGA display controller cards. Pins 1–26 on the feature
connector connect directly to corresponding pins on data input connector J1
of the display. Pins 27–34 may be left disconnected.
Video Data
Input signals D0, D1, D2, D3 (and D4, D5, D6, D7 in two data parallel mode)
contain the four bit serial video data to be displayed on the screen. Pixel
information is supplied from left to right and from top to bottom. The four
data bits can be interpreted as colour data or binary gray shade codes.
Gray Shades
The display is capable of displaying sixteen true levels of luminance. The four
bit video input data can either be mapped to colour coding or binary gray
shade coding. Colour coding is selected by pulling COLMAP control input
HIGH. A LOW state in COLMAP control input selects binary coding. See
'Programmable Features' in page3 for setting the coding if COLMAP input is
left disconnected.
Table 5. 16 levels of gray when colour mapping is used.
D3 D2 D1 D0 Colour
Gray
Level
0 0 0 0 Black
0
0 0 0 1 Blue
1
0 0 1 0 Green
5
0 0 1 1 Cyan
8
0 1 0 0 Red
2
0 1 0 1 Magenta
3
0 1 1 0 Brown
6
0 1 1 1 White
11
1 0 0 0 Gray
4
1 0 0 1 Lt.
Blue
7
1 0 1 0 Lt.
Green
12
1 0 1 1 Lt.
Cyan
13
1 1 0 0 Lt.
Red
9
1 1 0 1 Lt.
Magenta
10
1 1 1 0 Yellow
14
1 1 1 1 White(High
Int) 15
For maximum text readability, the default text brightness level is mapped in
text modes 2+, 3+, 7 and 7+ to high intensity white (level 15). If colour coding
is selected levels 11 and 15 are changed. If binary coding is selected, levels 7
and 15 are changed respectively. Please find complete description of VGA
modes in page 11.
