SAA5X9X Datasheet, PDF (23/68 Pages) NXP Semiconductors – Economy teletext and TV microcontrollers

Philips Semiconductors
Economy teletext and TV microcontrollers
Preliminary specification
SAA5x9x family
REGISTER
FUNCTION
Teletext Register 5 (TXT5) - WRITE only
BKGND OUT
background colour displayed outside teletext boxes (logic 1)
BKGND IN
background colour displayed inside teletext boxes (logic 1)
COR OUT
COR output active outside teletext boxes (logic 1)
COR IN
COR output active inside teletext boxes (logic 1)
TEXT OUT
text displayed outside teletext boxes (logic 1)
TEXT IN
text displayed inside teletext boxes (logic 1)
PICTURE ON OUT video picture displayed outside teletext boxes (logic 1)
PICTURE ON IN
video picture displayed inside teletext boxes (logic 1)
Teletext Register 6 (TXT6) - WRITE only
See TXT5
this register has the same meaning as TXT5 but is only invoked if either newsflash (C5) or
subtitle (C6) bit in row 25 of the basic page memory is set
Teletext Register 7 (TXT7) - WRITE only
STATUS ROW TOP display row 24 below (logic 0) or above (logic 1) teletext page
CURSOR ON
display cursor at location pointed to by TXT9 and TXT10 (logic 1)
REVEAL
display characters in areas with the conceal attribute set (logic 1)
TOP/BOTTOM
display rows 0 to 11 (logic 0) or 12 to 23 (logic 1) when the double height bit is set
DOUBLE HEIGHT display each character as twice normal height (logic 1)
BOX ON 24
enable teletext boxes in memory row 24 (logic 1)
BOX ON 1-23
enable teletext boxes in memory rows 1 to 23 (logic 1)
BOX ON 0
enable teletext boxes in memory row 0 (logic 1)
Teletext Register 8 (TXT8)
I²C SELECT⁽²⁾
select bit I²C-bus (logic 0) or byte I²C-bus (logic 1)
IDS ENABLE⁽²⁾
capture teletext Independent Date Services (logic 1)
DISABLE
SPANISH⁽²⁾
disable special treatment of Spanish packet 26 decoding
PKT 26 RECEIVED set to logic 1 when packet 26 teletext data processed
WSS RECEIVED⁽⁵⁾ set to logic 1 when wide screen signalling data received
WSS ON⁽⁵⁾
enable acquisition of wide screen signalling data
CVBS0/CVBS1
select CVBS0 (logic 0) or CVBS1 (logic 1) input to the device
Teletext Register 9 (TXT9) - WRITE only
CURSOR FREEZE locks current cursor position (logic 1)
CLEAR MEMORY write 20H into every location in teletext memory (logic 1)
A0
TXT11 accesses the basic page memory, selected by TXT15 on the 10 page device, (logic 0)
or extension packet memory (logic 1)
R4 to R0
memory row to be accessed by TXT11
1997 Jul 07
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