SAA5290A Philips Semiconductors, SAA5290A Datasheet - Page 24

• Manufacturer Part Number: SAA5290A
• Description: Economy teletext and TV microcontrollers
• Manufacturer: Philips Semiconductors

Philips Semiconductors
1997 Jul 07
Teletext Register 10 (TXT10) - WRITE only
C5 to C0
Teletext Register 11 (TXT11)
D7 to D0
Teletext Register 12 (TXT12) - READ only
625/525 SYNC
ROM VER R4 to R0
TXT ON
VIDEO SIGNAL
QUALITY
Teletext Register 13 (TXT13)
VPS RECEIVED
PAGE CLEARING
525 DISPLAY
525 TEXT
625 TEXT
PKT 8/30
FASTEXT
TIB
Teletext Register 14 (TXT 14) - WRITE only; note 3
PAGE3 to PAGE0
Teletext Register 15 (TXT15) - WRITE only; note 3
BLOCK3 to BLOCK0 selects which memory block accessed by TXT9, 10 and 11
Teletext Register 16 (TXT16) - WRITE only
Y2 to Y0
X1 to X0
Teletext Register 17 (TXT17) - Write only
FORCE ACQ0,1
FORCE 625
FORCE 525
SCREEN COL 2 to 0 defines colour displayed instead of TV picture and black background
Economy teletext and TV microcontrollers
REGISTER
memory column to be accessed by TXT11
data byte written to, or read from teletext memory
a 625-line CVBS signal (logic 0), or a 525-line CVBS signal (logic 1) is being input
mask programmable identification for character set
power has been applied to the teletext hardware (logic 1)
CVBS input can be locked on by the teletext decoder (logic 1)
set to logic 1 when VPS data is received
set when software requested page clear in progress
set to logic 1 when 525-line syncs are driving the display
set to logic 1 when 525-line teletext is received
set to logic 1 when 625-line teletext is received
set to logic 1 when packet 8/30 is detected
set to logic 1 when packet X27/0 is detected
text interface busy; logic 1 indicates that TXT registers 0 to 16 cannot currently be accessed
selects which page to display
sets vertical position of display area
sets horizontal position of display area
force acquisition mode
force display to 625-line mode
force display to 525-line mode
24
FUNCTION
SAA5x9x family
Preliminary specification