VSP 94x2A
DATA SHEET
2.5.5.3. BLANK Generator
be replaced by the background values and vice versa.
There is also the possibility to realize a fixed border via
the I²C bus (BORDPOSH and BORDPOSV). 4096 dif-
ferent colors are available.
The BLANK signal is used to horizontally and vertically
mark active picture area. It is enabled by BLANEN and
its polarity can be chosen by BLANPOL and VBLAN-
POL. Referred to hsync, the start is given by BLAN-
DEL and its length is given by BLANLEN, both adjust-
able with 4 pixel resolution. Referred to vsync, the start
is given by VBLANDEL and its length is given by
VBLANLEN, both adjustable in 1 lines resolution.
BORDPOSH and BORDPOSV also influence the win-
dow generation. This means the automatic opening
and closing of the picture will start or end at the posi-
tion which is defined with these values. The border is
calculated with the following formula: The horizontal
border on the left side of the TV screen is 2*BORD-
POSH and 2*BORDPOSH on the right side of the TV
screen. This means, that 4*BORDPOSH pixels are
overwritten with border values. The same applies to
the vertical direction. 4*BORDPOSV lines in total are
overwritten with background values. BORDERV
decides whether upper or lower or both borders are
displayed. BORDERH decides whether left or right or
both borders are displayed.
2.5.5.4. Background Generator
This generator is able to realize an automatic closing
and opening of the displayed picture. This means that
with every picture the displayed colored background,
defined by UBORDER, VBORDER and YBORDER
will get bigger or smaller. The original picture data will
Table 2–14: Display line scanning pattern sequence
Display Line Scanning Pattern Sequence
1. to 2.
2. to 3.
313
3. to 4.
312
4. to 5.(1.)
313
a a a a
b b b b
a a b b
a b a b
312
313
312
313
312
312
312.5
312.5
313
312.5
312.5
312.5
312.5
28
Aug. 16, 2004; 6251-552-1DS
Micronas
MICRONAS [ MICRONAS ]
