參數(shù)資料
型號(hào)： SAA5246
廠商： NXP Semiconductors N.V.
英文描述： 10K OHM 0.1% 1/16W CHP RES (0603) 103
中文描述： 綜合貴賓和圖文電視IVT1.0
文件頁(yè)數(shù)： 19/50頁(yè)
文件大?。?/td> 630K
代理商： SAA5246
January 1993
19
Philips Semiconductors
Product specification
Integrated VIP and Teletext (IVT1.0)
SAA5246A
SAA5246A page memory organization
The organization of the page memory is illustrated by Fig.10. The SAA5246A provides an additional row as compared
with first generation decoders; this brings the display format up to 40 characters by 25 rows. Rows 0 to 23 form the
teletext page; row 24 is the extra row available for software generated status messages and FLOF/FASTEXT prompt
information.
Note to Fig.10
Row 0
Row 0 is for the page header. The first seven columns (0 to 6) are free for status messages. The eighth is an
alphanumeric white or green control character, written automatically by SAA5246A to give a green rolling header when
a page is being looked for. The last eight characters are for rolling time.
Row 25
The first 10 bytes of Row 25 contain control data relating to the received page as shown in Table 1. The remaining 14
bytes are free for use by the microprocessor.
Fig.10 Basic page memory organization.
handbook, full pagewidth
PACKET X/22
PACKET X/23
PACKET X/24 STORED HERE IF R1D7 = 1
14
14 bytes free
for microprocessor
ROW
0
1
2
3
4
21
22
23
24
25
MLA845 - 1
10
10 bytes for
received page
information
5
to
20
MAIN PAGE DISPLAY AREA
7 characters
for status
24 characters
from page header rolling
when display page looked for
8 characters
always rolling
(time)
fixed character written by IVT hardware
alphanumerics white for normal
alphanumerics green when looking for display page
7
1
24
8
相關(guān)PDF資料
PDF描述
SAA5246A Integrated VIP and Teletext IVT1.0
SAA5246AGP Integrated VIP and Teletext IVT1.0
SAA5246AP Integrated VIP and Teletext IVT1.0
SAA5249GP Integrated VIP and Teletext with Background Memory Controller IVT1.1BMCX
SAA5249 Integrated VIP and Teletext with Background Memory Controller IVT1.1BMCX
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SAA5246A 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Integrated VIP and Teletext IVT1.0
SAA5246AGP 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Integrated VIP and Teletext IVT1.0
SAA5246AP 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Integrated VIP and Teletext IVT1.0
SAA5249 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Integrated VIP and Teletext with Background Memory Controller IVT1.1BMCX
SAA5249GP 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Integrated VIP and Teletext with Background Memory Controller IVT1.1BMCX
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