MCD212 Motorola, MCD212 Datasheet - Page 59

• Manufacturer Part Number: MCD212
• Description: Video Decoder and System Controller(with JTAG)
• Manufacturer: Motorola

7–6
7.5
The backdrop plane can have 16 different colors, see Table 7–5. This BD plane is positioned behind
the cursor and planes A and B. The color is programmed by writing via CH1 to register hD8. The
possible colors are listed in Table 7–5 along with the complimentary colors which can be used for the
cursor.
7.6
The cursor is shown in the cursor plane. The dimension of the cursor plane is 16 x 16 pixels. A 1 in
the cursor plane activates the cursor color for that pixel, while a 0 sets it to transparency. The resolu-
tion of the cursor can be switched between normal resolution and double resolution. The cursor has
one color. The cursor plane can be enabled or disabled.
The cursor color is set by programming the cursor control register via CH#1 at location hCE. Along with
setting the color, the cursor enable, the on/off period, and cursor resolution can be programmed via
this same register. The cursor can be set to blink with programmable on and off periods. Both periods
can be specified by three bits. The on/off periods equal multiples of 12 times the TV field period (200
ms in 60 Hz system; 240 ms in 50 Hz system). If on and off periods are both set to 0, then the cursor
is on indefinitely. The blink type may be “on/off” or “normal color/complementary color”.
The cursor position is related to the position of the upper–left pixel in the cursor plane and is pro-
grammed via CH#1 in the cursor position register at location hCD. The X–position of this pixel is speci-
fied by the number of double resolution pixels between this pixel and the left border of the full screen
display. The Y–position is specified by the number of lines between this pixel and the upper part of the
full screen display.
Cursor control and position can be programmed during horizontal and/or vertical retrace periods.
The cursor pattern is programmed via CH#1 at location hCF.
BACKDROP
CURSOR
NOTE: hb = Half Brightness.
Table 7–5. Possible Cursor and Background Colors
Y R G B
0 0 0 0
0 0 0 1
0 0 1 0
0 0 1 1
0 1 0 0
0 1 0 1
0 1 1 0
0 1 1 1
1 0 0 0
1 0 0 1
1 0 1 0
1 0 1 1
1 1 0 0
1 1 0 1
1 1 1 0
1 1 1 1
Full Brightness = level 230, Half = level 122, Black = level 16.
Cursor
hb – Magenta
hb – Green
hb – Yellow
hb – Cyan
hb – Blue
hb – Red
Magenta
Green
Yellow
Color
Black
Black
White
Cyan
Grey
Blue
Red
MCD212
Complementary
hb – Magenta
hb – Yellow
hb – Green
hb – Cyan
hb – Blue
hb – Red
Magenta
Yellow
Green
Color
White
Black
Black
Cyan
Grey
Blue
Red
Background
Y R G B
0 1 1 1
0 1 1 0
0 1 0 1
0 1 0 0
0 0 1 1
0 0 1 0
0 0 0 1
0 0 0 0
1 1 1 1
1 1 1 0
1 1 0 1
1 1 0 0
1 0 1 1
1 0 1 0
1 0 0 1
1 0 0 0
MOTOROLA