saa5290 NXP Semiconductors, saa5290 Datasheet - Page 21

• Manufacturer Part Number: saa5290
• Description: Page Economy Teletext/tv Microcontroller
• Manufacturer: NXP Semiconductors

Philips Semiconductors
February 1995
TXT5 - Teletext register 5 (WRITE only)
BKGND OUT
BKGND IN
COR OUT
COR IN
TEXT OUT
TEXT IN
PICTURE ON OUT
PICTURE ON IN
TXT6 - Teletext register 6 (WRITE only)
TXT7 - Teletext register 7 (WRITE only)
STATUS ROW TOP
CURSOR ON
CONCEAL/REVEAL
TOP/BOTTOM
SNG/DBL HEIGHT
BOX ON 24
BOX ON 1-23
BOX ON 0
TXT8 - Teletext register 8 (WRITE only)
CVBS0/CVBS1
TXT9 - Teletext register 9 (WRITE only)
CLEAR MEMORY
A0
R0 to R4
TXT10 - Teletext register 10 (WRITE only)
C0 to C5
TXT11 - Teletext register 11
D0 to D7
One page Economy Teletext/TV
microcontroller
REGISTER
Background colour displayed outside teletext boxes (logic 1).
Background colour displayed inside teletext boxes (logic 1).
COR output active outside teletext boxes (logic 1).
COR output active inside teletext boxes (logic 1).
Text displayed outside teletext boxes (logic 1).
Text displayed inside teletext boxes (logic 1).
Video picture displayed outside teletext boxes (logic 1).
Video picture displayed inside teletext boxes (logic 1).
This register has the same meaning as TXT5 but is only invoked if either newsflash (C5) or the
subtitle (C6) bit in Row 25 of the basic page memory is set.
Display cursor at location pointed to by TXT9 and TXT10 (logic 1).
Display characters in areas with the conceal attribute set (logic 1).
Enable teletext boxes in memory Row 24 (logic 1).
Enable teletext boxes in memory Rows 1 to 23 (logic 1).
Enable teletext boxes in memory Row 0 (logic 1).
CVBS0 input (logic 0) or CVBS1 (logic 1) inputs used for teletext.
Access basic page memory (logic 0) or extension packet memory (logic 1) with TXT11 SFR.
Memory column to be accessed with TXT11 SFR.
data byte written to, or read from, teletext memory.
Display Row 24 below (logic 0) or above (logic 1) teletext page.
Display Rows 0 to 11 (logic 0) or 12 to 23 (logic 1) when the double height bit is set.
Display each character at twice normal height (logic 1).
Write 20H into every location in teletext memory (logic 1).
Memory row to be accessed with TXT11 SFR.
21
FUNCTION
Preliminary specification
SAA5290