參數(shù)資料
型號(hào)： SAA5254
廠商： NXP Semiconductors N.V.
英文描述： Integrated VIP and teletext decoder IVT1.1X
中文描述： 綜合貴賓和圖文電視解碼器IVT1.1X
文件頁(yè)數(shù)： 17/36頁(yè)
文件大小： 805K
代理商： SAA5254
1996 Nov 07
17
Philips Semiconductors
Preliminary specification
Integrated VIP and teletext decoder
(IVT1.1X)
SAA5254
Notes to Table 7
1.
The dash (
) indicates these bits are inactive and must be written to logic 0 for future compatibility.
2.
All bits in Registers R0 to R13 are cleared to logic 0 on power-up except bits D0 and D1 of Registers R1, R5 and R6
which are set to logic 1.
3.
All memory is cleared to space (00100000) on power-up, except Row 0 Column 7 Chapter 0, which is alpha white
(00000111) as the acquisition circuit is enabled but all pages are on hold.
4.
TB must be set to logic 0 for normal operation.
5.
The I
2
C-bus slave address is 00110001.
Table 8
Register description
REGISTER BIT D0 TO D7
FUNCTION
R0 AVANCED CONTROL - auto-increments to Register 1
R11/R11B SELECT
DISABLE ODD/EVEN
DISPLAY STATUS ROW
Selects reading of R11 if LOW or if HIGH R11B.
Forces ODD/EVEN output LOW when logic 1.
When SET = 1 and R1D6 = 1 open (8-bit mode) then all the text display is blanked
out apart from the status row, this allows the page memory to be used for
non-textural data, such as in the German TOP system.
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 display PLL to free run in all conditions.
Automatic display of FASTEXT prompt row when logic 1.
DISABLE HDR ROLL
AUTO ODD/EVEN
FREE RUN PLL
X/24 POS
R1 MODE - auto-increments to Register 2
T0, T1
TCS ON
DEW/FULL FIELD
ACQ ON/OFF
7 + P/8-BIT
DISABLE PKT 26
VCS TO SCS
Interlace/non-interlace 312/313 line control (see Table 10).
Text composite sync or direct sync select (see Table 10 for FFB mode selection).
Field-flyback or full-channel mode.
Acquisition circuits turned off when logic 1.
7 bits with parity checking or 8-bit mode.
Disable automatic processing of packet 26.
When logic 1 enables display of messages with 60 Hz input signal.
R2 PAGE REQUEST ADDRESS - auto-increments to Register 3
START COLUMN SC0 to SC2
TB
Point to start column for page request data (see Table 9).
Must be logic 0 for normal operation.
R3 PAGE REQUEST DATA - does not auto-increment
(see Table 9)
R5 NORMAL DISPLAY CONTROL - auto-increments to Register 6
R6 NEWSFLASH/SUBTITLE DISPLAY CONTROL - auto-increments to Register 7;
note 1
PON
TEXT
COR
BKGND
Picture on.
Text on.
Contrast reduction on.
Background colour on.
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