參數(shù)資料
型號： SAA55XX
廠商： NXP Semiconductors N.V.
英文描述： TV microcontrollers with Closed Captioning (CC) and On-Screen Display (OSD)
中文描述： 與隱藏字幕（CC）和屏幕顯示（OSD電視微控制器）
文件頁數(shù)： 23/84頁
文件大小： 352K
代理商： SAA55XX
2000 Feb 23
23
Philips Semiconductors
Preliminary specification
TV microcontrollers with Closed Captioning (CC)
and On-Screen Display (OSD)
SAA55xx
M1 to M0
mode control bits timer/counter 0; M<1:0>:
00 = 8-bit timer or 8-bit counter with divide-by-32 prescaler
01 = 16-bit time interval or event counter
10 = 8-bit time interval or event counter with automatic reload upon overflow;
reload value stored in TH0
11 = one 8-bit time interval or event counter and one 8-bit time interval counter
Text Register 0 (TXT0)
AUTO FRAME
DISABLE FRAME
frame output is switched off automatically if any video displayed (logic 1)
force frame output to be LOW (logic 1)
Text Register 1 (TXT1)
FIELD POLARITY
H POLARITY
V POLARITY
VSYNC pulse in second half of line during even field (logic 1)
HSYNC reference edge is negative going (logic 1)
VSYNC reference edge is negative going (logic 1)
Text Register 4 (TXT4)
OSD BANK ENABLE
alternate OSD location available via graphic attribute, additional 32 location
(logic 1)
enable display of quadruple width characters (logic 1)
eastern character selection of character codes A0H to FFH (logic 1)
disable normal decoding of double height characters (logic 1)
enable meshing of black background (logic 1)
enable meshing of coloured background (logic 1)
display black background as video (logic 1)
display shadow/fringe (default SE black) (logic 1)
QUAD WIDTH ENABLE
EAST/WEST
DISABLE DOUBLE HEIGHT
B MESH ENABLE
C MESH ENABLE
TRANS ENABLE
SHADOW ENABLE
Text Register 5 (TXT5)
BKGND OUT
BKGND IN
COR OUT
COR IN
TEXT OUT
TEXT IN
PICTURE ON OUT
PICTURE ON IN
background colour displayed outside teletext boxes (logic 1)
background colour displayed inside teletext boxes (logic 1)
COR active outside teletext and OSD boxes (logic 1)
COR active inside teletext and OSD boxes (logic 1)
text displayed outside teletext boxes (logic 1)
text displayed inside teletext boxes (logic 1)
video displayed outside teletext boxes (logic 1)
video displayed inside teletext boxes (logic 1)
Text Register 6 (TXT6)
BKGND OUT
BKGND IN
COR OUT
COR IN
TEXT OUT
TEXT IN
PICTURE ON OUT
background colour displayed outside teletext boxes (logic 1)
background colour displayed inside teletext boxes (logic 1)
COR active outside teletext and OSD boxes (logic 1)
COR active inside teletext and OSD boxes (logic 1)
text displayed outside teletext boxes (logic 1)
text displayed inside teletext boxes (logic 1)
video displayed outside teletext boxes (logic 1)
BIT
FUNCTION
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