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參數資料
| 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： | 24/84頁 |
| 文件大小： | 352K |
| 代理商： | SAA55XX |
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2000 Feb 23
24
Philips Semiconductors
Preliminary specification
TV microcontrollers with Closed Captioning (CC)
and On-Screen Display (OSD)
SAA55xx
PICTURE ON IN
video displayed inside teletext boxes (logic 1)
Text Register 7 (TXT7)
CURSOR ON
DOUBLE HEIGHT
BOX ON 24
BOX ON 1
23
BOX ON 0
display cursor at position given by TXT9 and TXT10 (logic 1)
display each character as twice normal height (logic 1)
enable display of teletext boxes in memory row 24 (logic 1)
enable display of teletext boxes in memory row 1 to 23 (logic 1)
enable display of teletext boxes in memory row 0 (logic 1)
Text Register 8 (TXT8)
FLICKER STOP ON
DISABLE SPANISH
PKT 26 RECEIVED
(2)
WSS RECEIVED
(2)
WSS ON
CVBS1/CVBS0
disable ‘Flicker Stopper’ circuitry (logic 1)
disable special treatment of Spanish packet 26 characters (logic 1)
packet 26 data has been processed (logic 1)
wide screen signalling data has been processed (logic 1)
enable acquisition of WSS data (logic 1)
select CVBS1 as source for device (logic 1)
Text Register 9 (TXT9)
CURSOR FREEZE
CLEAR MEMORY
(1)
R4 to R0
(2)
lock cursor at current position (logic 1)
clear memory block pointed to by TXT15
current memory row value
Text Register 10 (TXT10)
C5 to C0
(3)
current memory column value
Text Register 11 (TXT11)
D7 to D0
data value written or read from memory location defined by TXT9, TXT10 and
TXT15
Text Register 12 (TXT12)
525/625 SYNC
(4)
ROM VER4 to ROM VER0
VIDEO SIGNAL QUALITY
525-line CVBS signal is being received (logic 1)
mask programmable identification for character set
acquisition can be synchronised to CVBS (logic 1)
Text Register 13 (TXT13)
PAGE CLEARING
525 DISPLAY
software or power-on page clear in progress (logic 1)
525-line synchronisation for display (logic 1)
Text Register 17 (TXT17)
FORCE ACQ1 to FORCE ACQ0
FORCE ACQ<1:0>:
00 = automatic selection
01 = force 525 timing, force 525 teletext standard
10 = force 625 timing, force 625 teletext standard
11 = force 625 timing, force 525 teletext standard
BIT
FUNCTION
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