saa5244a NXP Semiconductors, saa5244a Datasheet - Page 20

• Manufacturer Part Number: saa5244a
• Description: Integrated Teletext Decoder Ivt1.1
• Manufacturer: NXP Semiconductors

Philips Semiconductors
REGISTER DESCRIPTION
March 1992
R0 ADVANCED CONTROL - auto increments to Register 1
R11/R11B
SELECT
DISABLE
ODD/EVEN
DISABLE HDR
ROLL
AUTO ODD/EVEN
FREE RUN PLL
X24 POS
R1 MODE - auto increments to Register 2
T0, T1
TCS ON
DEW/FULL FIELD
ACQ ON/OFF
VCS TO SCS
R2 PAGE REQUEST ADDRESS - auto increments to Register 3
COL SC0 - SC2
TB
R3 PAGE REQUEST DATA - does not auto increment (see Table 3)
R5 NORMAL DISPLAY CONTROL - auto increments to Register 6
R6 NEWSFLASH/SUBTITLE DISPLAY CONTROL - auto increments to Register 7
PON
TEXT
COR
BKGND
These functions have IN and OUT referring to inside and outside the boxing function respectively.
R7 DISPLAY MODE - does not auto increment
BOX ON 0
BOX ON 1-23
BOX ON 24
DOUBLE HEIGHT
BOTTOM HALF
REVEAL ON
CURSOR ON
STATUS TOP
Integrated VIP and teletext decoder
(IVT1.1)
Selects reading of R11 or R11B
Forces ODD/EVEN output LOW when logic 1
Disables green rolling header and time
When set forces ODD/EVEN low if any TV picture displayed, if DISABLE ODD/EVEN = 0
Will force the PLL to free run in all conditions
Automatic display of FASTEXT prompt row when logic 1
Interlace/non-interlace 312/313 line control (see Table 4)
Text composite sync or direct sync select
Field-flyback or full channel mode
Acquisition circuits turned off when logic 1
When logic 1 enables display of messages with 60 Hz input signal
Point to start column for page request data (see Table 3)
Must be logic 0 for normal operation
Picture on
Text on
Contrast reduction on
Background colour on
Boxing function allowed on Row 0
Boxing function allowed on Row 1-23
Boxing function allowed on Row 24
To display double height text
To select bottom half of page when DOUBLE HEIGHT = 1
To reveal concealed text
To display cursor
Row 25 displayed above or below the main text
20
Product specification
SAA5244A