SAA5244A Datasheet, PDF (20/32 Pages) NXP Semiconductors – Integrated VIP and teletext decoder IVT1.1

Philips Semiconductors
Integrated VIP and teletext decoder
(IVT1.1)
Product specification
SAA5244A
REGISTER DESCRIPTION
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
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
R1 MODE - auto increments to Register 2
T0, T1
TCS ON
DEW/FULL FIELD
ACQ ON/OFF
VCS TO SCS
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
R2 PAGE REQUEST ADDRESS - auto increments to Register 3
COL SC0 - SC2
TB
Point to start column for page request data (see Table 3)
Must be logic 0 for normal operation
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
Picture on
TEXT
Text on
COR
Contrast reduction on
BKGND
Background colour on
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
Boxing function allowed on Row 0
BOX ON 1-23
Boxing function allowed on Row 1-23
BOX ON 24
Boxing function allowed on Row 24
DOUBLE HEIGHT To display double height text
BOTTOM HALF
To select bottom half of page when DOUBLE HEIGHT = 1
REVEAL ON
To reveal concealed text
CURSOR ON
To display cursor
STATUS TOP
Row 25 displayed above or below the main text
March 1992
20