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參數(shù)資料
| 型號： | P87C770 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Microcontrollers for NTSC TVs with On-Screen Display (OSD) and Closed Caption (CC)(在NTSC TV中應(yīng)用的具有屏幕顯示和字幕關(guān)閉特點(diǎn)的微控制器) |
| 中文描述： | 微控制器用于NTSC電視的屏幕顯示（OSD）和字幕（CC）的（在NTSC電視中應(yīng)用的具有屏幕顯示和字幕關(guān)閉特點(diǎn)的微控制器） |
| 文件頁數(shù)： | 42/80頁 |
| 文件大小： | 266K |
| 代理商： | P87C770 |
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1999 Jun 11
42
Philips Semiconductors
Product specification
Microcontrollers for NTSC TVs with On-Screen
Display (OSD) and Closed Caption (CC)
P8xCx70 family
If some of the characters are not used for depicting special
characters they may be used as normal. In this case they
are accessible via the columns B and C
(see Section 18.10).
The four colours are allocated as shown in Table 53.
An example of a special character is shown in Fig.16. If the
screen colour is transparent (implicit in Mixed mode) and
inside the object the box attribute is set, then the object is
surrounded by video. If the box attribute is not set the
background colour inside the object will also be displayed
as transparent.
Table 53
Special character colours
PLANE1
PLANE0
COLOUR ALLOCATION
0
0
1
0
1
0
background colour
foreground colour
foreground colour 6 or 14
depending on the set bank
foreground colour 7 or 15
depending on the set bank
1
1
18.2.17 E
ND OF
R
OW
The number of characters in a row is flexible and can be
determined by the end of row bit in the Serial Mode 1
character attribute, however the maximum number of
characters is determined by the setting of the text area
start and the text area end register.
The total number of characters displayed on a page is
limited by the internal RAM size. The characters are stored
sequential in the memory.
Fig.16 Special character example.
handbook, full pagewidth
MGK550
VOLUME
background colour
"set at" (Mode 0)
background colour
"set after" (Mode 1)
serial attribute
foreground colour 7
background colour
special character
foreground colour
normal character
foreground colour 6
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