參數(shù)資料
型號(hào)： SAA5288
廠(chǎng)商： NXP Semiconductors N.V.
英文描述： TV Microcontroller with Full Screen On Screen Display (OSD)(帶全屏屏幕顯示的TV微控制器)
中文描述： 電視微控制器，帶有全屏幕顯示（OSD）（帶全屏屏幕顯示的電視微控制器屏）
文件頁(yè)數(shù)： 26/48頁(yè)
文件大?。?/td> 508K
代理商： SAA5288
1997 Jun 24
26
Philips Semiconductors
Preliminary specification
TV microcontroller with full screen
On Screen Display (OSD)
SAA5288
7.7
On Screen Display boxes
The size implying OSD control characters (BCH to BFH)
are intended to allow OSD messages to be displayed.
OSD boxes are not the same as teletext boxes created
using the teletext boxing control characters
(0AH and 0BH).
When one of these characters occurs the display size
changes appropriately (to normal size for BCH, double
height for BDH, double width for BEH and double size for
BFH) and an OSD box starts from the next character
position (‘set after’). The OSD box ends either at the end
of the row of text or at the next size implying OSD
character. When an OSD box is ended using another size
implying OSD character the box ends at the position of the
control character (‘set at’). This arrangement allows
displays to be created without blank spaces at the ends of
the OSD boxes.
To prevent teletext control characters from affecting the
display of the OSD message the flash, teletext box,
conceal, separated graphics, twist and hold graphics
functions are all reset at the start of an OSD box, as they
are at the start of the row. In order to allow the most
commonly used display attributes to be set-up before the
box starts the foreground colour, background colour and
mosaics on/off attributes are not reset.
The text within an OSD box is always displayed in text
mode i.e. as if the Text On and Bkgnd On bits are both set
to a logic 1. The type of display produced inside an OSD
box is, therefore, dependant on the states of the
TXT4.SHADOW ENABLE, TXT4.TRANS ENABLE,
TXT4.BMESH ENABLE and TXT4.CMESH ENABLE
register bits, as described previously. OSD boxes can only
be displayed in TV mode i.e. when the Picture On SFR bit
is a logic 1 and the Text On SFR bit is a logic 0, both inside
and outside text boxes and for both normal and
newsflash/subtitle pages. The display of OSD boxes is not
affected by the C7, suppress header, and C10, inhibit
display, control bits stored in row 25 of the page memory.
7.8
Screen colour
The register bits TXT17.SCREEN COL2-0 can be used to
define a colour to be displayed in place of the TV picture
and the black background colour. If the bits are all set to 0,
the screen colour is defined as ‘transparent’ and the TV
picture and background colour are displayed as normal.
Screen colour is displayed from 10.5 to 62.5
μ
s after the
active edge of the HSync input and on TV lines 23 to 310
inclusive, for a 625-line display, and lines 17 to 260
inclusive for a 525-line display.
When the screen colour has been redefined, no TV picture
is displayed so the Frame de-interlace output can be
activated, if the SFR bits controlling FRAME are set up to
allow this.
Table 15
Screen colours
7.9
Cursor
If the TXT7.CURSOR ON bit is set, a cursor is displayed.
The cursor operates by reversing the background and
foreground colours in the character position pointed to by
the active row and column bits in the TXT9 and TXT10
SFRs.
Setting the TXT9.CURSOR FREEZE bit, causes the
cursor to stay in its current position, no matter what
happens to the active row and column positions. This
means that the software can read data from the memory
(e.g. TOP table information) without affecting the position
of the cursor.
SCREEN
COL 2
SCREEN
COL 1
SCREEN
COL 0
SCREEN
COLOUR
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
transparent
red
green
yellow
blue
magenta
cyan
white
相關(guān)PDF資料
PDF描述
SAA5288PS TV microcontroller with full screen On Screen Display OSD
SAA5290 One page Economy Teletext/TV microcontroller
SAA5290A Economy teletext and TV microcontrollers
SAA5290PS Economy teletext and TV microcontrollers
SAA5290ZP One page Economy Teletext/TV microcontroller
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SAA5288PS 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:TV microcontroller with full screen On Screen Display OSD
SAA5290 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:Economy teletext and TV microcontrollers
SAA5290A 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:Economy teletext and TV microcontrollers
SAA5290PS 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:Economy teletext and TV microcontrollers
SAA5290ZP 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:One page Economy Teletext/TV microcontroller
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