參數(shù)資料
型號： P83C270
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)閉特點的微控制器）
文件頁數(shù)： 46/80頁
文件大?。?/td> 266K
代理商： P83C270
1999 Jun 11
46
Philips Semiconductors
Product specification
Microcontrollers for NTSC TVs with On-Screen
Display (OSD) and Closed Caption (CC)
P8xCx70 family
18.5.1.3
Top display row select
The top display row of the scroll area is set using the
SSP0 to SSP3 bits in the Soft Scroll Area Control Register
(see Section 18.9.6).
Table 63
Soft scroll area position value
18.5.1.4
Visible scroll area height selection
The visible scroll area height is set using the
SSH0 to SSH3 bits in the Soft Scroll Area Control Register
(see Section 18.9.6).
Table 64
Soft scroll area height value
SSP<3-0>
DISPLAY AREA POSITION
3
2
1
0
0
↓
1
0
↓
1
0
↓
1
0
↓
1
Row 0
↓
Row 15
SSH<3-0>
DISPLAY AREA HEIGHT
3
2
1
0
0
↓
1
0
↓
1
0
↓
1
0
↓
1
1 Row
↓
16 Rows
18.5.1.5
Scroll rows range selection
The scroll rows range is set in the Scroll Rows Range
Register (see Section 18.9.7). Setting this register
initialises the scroll row counter so that the first (top) row is
the Start Scroll Row Number. By redefining the contents of
this register a hard scrolling can also be achieved. If a new
start scroll row number is loaded during a soft scroll action,
then this value will be taken as the new start value after the
scrolling action has been completed.
Table 65
Start scroll row number
Table 66
Stop scroll row number
STS<3-0>
START SCROLL ROW
NUMBER
3
2
1
0
0
↓
1
0
↓
1
0
↓
1
0
↓
1
Row 0
↓
Row 15
SPS<3-0>
STOP SCROLL ROW
NUMBER
3
2
1
0
0
↓
1
0
↓
1
0
↓
1
0
↓
1
Row 0
↓
Row 15
Fig.17 Soft scroll area.
handbook, full pagewidth
15
MGL148
14
13
12
11
10
9
8
7
6
5
scroll area position
pointer
(SSP3 to SSP0 e.g. 6)
visible area height
(SSH3 to SSH0 e.g. 4)
4
3
2
1
0
ROW
usable for OSD display
usable for OSD display
should not be used for
OSD display
should not be used for
OSD display
soft scrolling area
start row (STR3 to STR0 e.g. 3)
stop row (SPR3 to SPR0 e.g. 11)
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