ST92195D datasheet(110/249 Pages) STMICROELECTRONICS

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ST92195C/D - ON SCREEN DISPLAY (OSD)

Figure 63l. Parallel Mode Display Example 1 Showing Character and Attribute Byte Pairs

Parallel Mode Display Example 2

7.4.4.5 Rules When Using Size Attributes

Secondary effects can be generated when the

shape format is not respected.

The 3 figures below describe the combination of

parallel size attributes to obtain the different char-

acter sizes:

· Double Width

· Double Height

· Double Size

7.4.4.6

Example

using

Double

Width

Attribute

In parallel mode, double width on character can be

obtained using the following rule (Figure 64 on

page 111):

It is important to set Double Width (bit 3 of the

shape attribute) on the current character attribute

and Single Size on the following one. The second

character location can be either a serial attribute or

another character.

On the contrary, if a new color or a Double Width

attribute is set in the second attribute location, the

second part of the character is overlapped.

RAM content in Parallel Mode

ANF

Characters

SS : Simple Size b7 = 0

DW : Double Width b7 = 1

DS : Double Size b7 = 1

NC : New Colour b7 = 0

Parallel Attribute

UH=1

UH=0

UH=1

UH=0

Display

A B

NF : New Foreground (Serial Attribute)

SA : Serial Attribute

UH=1

UH =0

VR02112F

M nu

s s

T re bl e

B a

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