13/17

MTV021 Revision 5.0 6/29/1999

MTV021

MYSON

TECHNOLOGY

WW31, WW30 - Determines the shadow width of the window 3 when WSHD bit of th window 3 is enabled.

WW21, WW20 - Determines the shadow width of the window 2 when WSHD bit of th window 2 is enabled.

WW11, WW10 - Determines the shadow width of the window 1 when WSHD bit of th window 1 is enabled.

WH41, WH40 - Determines the shadow height of the window 4 when WSHD bit of th window 4 is enabled.

Please refer to the Table 7 for more details.

TABLE 7. Shadow Height Setting

WH31, WH30 - Determines the shadow height of the window 3 when WSHD bit of th window 3 is enabled.

WH21, WH20 - Determines the shadow height of the window 2 when WSHD bit of th window 2 is enabled.

WH11, WH10 - Determines the shadow height of the window 1 when WSHD bit of th window 1 is enabled.

3.11 Color encoder

The decoder generates the video output to ROUT, GOUT and BOUT by integrating window color, border

blackedge, luminance output and color selection output (R, G, B) to form the desired video outputs.

3.12 PWM D/A converter

There are 8 open-drain PWM D/A outputs (PWM0 to PWM7). These PWM D/A converter outputs pulse width

are programmable by writing data to Column 19 to 26 registers of Row 15 with 8-bit resolution to control the

pulse width duration from 0/256 to 255/256. And the sampling rate is selected by (VCO1, VCO0) shown as

table 5. In applications, all open-drain output pins should be pulled-up by external resistors to supply voltage

(5V to 9V) for desired output range.

Column 22

B7

b6

b5

b4

b3

b2

b1

b0

WH41

WH40

WH31

WH30

WH21

WH20

WH11

WH10

(WH41, WH40)

(0, 0)

(0, 1)

(1, 0)

(1, 1)

Shadow Height

(unit in Line)

2

4

6

8

Bordering

Shadowing

M Pixels

N Horizontal lines

M Pixels

N Horizontal lines

Note:

M and N are defined

by the registers of

row 15, column 21

and 22.

WINDOW AREA

FIGURE 6. Character Bordering and Shadowing and Shadowing on Window