MTV038N20 View Datasheet(PDF) - Myson Century Inc

Part Name

Description

Manufacturer

MTV038N20

On-screen-display controller for CRT/LCD monitor

Myson Century Inc 

MYSON

TECHNOLOGY

MTV038

(Revision 1.1)

ATTRIBUTE BYTES:

b7

b6

b5

b4

b3

b2

b1

b0

- BGR/B2 BGG/B1 BGB/B0 BLINK R

G

B

BGR, BGG, BGB - These three bits define the color of the background for its relative address character. If all

three bits are clear, no background will be shown(transparent). Therefore, a total of 7

background colors can be selected.

B2, B1, B0 - Select the character button boxes format of its relative address character.

= 0, 0, 0 -> Button box is disabled.

= 1, 0, 0 -> Start of depressed button box which is more than 1 character button box.

= 1, 0, 1 -> Start of depressed button box which is only 1 character button box.

= 1, 1, 0 -> Start of raised button box which is more than 1 character button box.

= 1, 1, 1 -> Start of raised button box which is only 1 character button box.

= 0, 1, 0 -> Middle of button box.

= 0, 0, 1 -> End of button box.

BLINK - Enable blinking effect while this bit is set to " 1 ". And the blinking is alternate per 32 vertical frames.

R, G, B - These three bits are used to specify its relative address character color.

3.7 Character button box generator

There are 4 character button box generators to generate 4 different types of button boxes including depressed

button box with only 1 character, depressed button box with more than 1 character, raised button box with

only 1 character, and raised button box with more than 1 character. The button boxes format is defined by

(B2, B1, B0) bits of attribute bytes. And these bits are described as below:

1).(1, x, x) means the start of character button box, and then B1, B0 mean button boxes format.

2).(0, 1, 0) means the middle of character button box.

3).(0, 0, 1) means the end of character button box.

The length of button box is also software control by (B2, B1, B0) bits. For example, if there is 1 raised button

box which length is equal to 6 characters, these (B2, B1, B0) bits will be (1, 1, 0), (0, 1, 0), (0, 1, 0), (0, 1, 0),

(0, 1, 0), (0, 0, 1). And if there is 1 depressed button box of which the length is equal to 4 characters, these

(B2, B1, B0) bits will be (1, 0, 0), (0, 1, 0), (0, 1, 0), (0, 0, 1). That is, (0, 1, 0) command number define the but-

ton box length. And only one byte, the attribute byte of button box start character, should be modified when

we want to change button box type to raised or depressed button. This is very easy and useful for software

programming.

Revision 1.1

-9-

2001/8/21

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