參數(shù)資料
型號： SAA5647HL
廠商： NXP Semiconductors N.V.
英文描述： Enhanced TV microcontrollers with On-Screen Display (OSD)(帶全屏顯示的增強(qiáng)型TV控制器)
中文描述： 與微控制器在強(qiáng)化電視屏幕顯示（OSD）（帶全屏顯示的增強(qiáng)型電視控制器）
文件頁數(shù)： 63/112頁
文件大?。?/td> 436K
代理商： SAA5647HL
2000 Jun 30
63
Philips Semiconductors
Objective specification
Enhanced TV microcontrollers with
On-Screen Display (OSD)
SAA56xx
The tabulation bit is also used with extension packets.
The first eight data bytes of packet X/1/24 are used to
extend the Fastext prompt row to 40 characters. These
characters are written into whichever part of the memory
the packet 24 is being written into (determined by the
‘X24 POSN’ bit).
Packets X/0/27/0 contain five Fastext page links and the
link control byte. They are captured, Hamming checked
and stored in the same way as are packets X/27/0 in
625-line text. Packets X/1/27/0 are not captured.
Because there are only two magazine bits in 525-line text,
packets with the magazine bits all set to a logic 0 are
referred to as being in magazine 4. Therefore, the
broadcast service data packet is packet 4/30, rather than
packet 8/30. As in 625-line text, the first 20 bytes of
packet 4/30 contain encoded data that is decoded in the
same way as in packet 8/30. The last 12 bytes of the
packetcontainshalfoftheparityencodedstatusmessage.
Packet 4/0/30 contains the first half of the message and
packet 4/1/30 contains the second half. The last four bytes
of the message are not written into memory. The first
20 bytes of the each version of the packet are the same,
so they are stored whenever either version of the packet is
acquired.
In 525-line text, each packet 26 only contains ten 24/18
Hamming encoded data triplets, rather than the 13 found
in 625-line text. The tabulation bit is used as an extra bit
(the MSB) of the designation code, allowing 32 packet 26s
to be transmitted for each page. The last byte of each
packet 26 is ignored.
handbook, full pagewidth
GSA004
Row 0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
0
6
7
8
9
0
23
39
Packet X/0/0
Packet X/0/1
Packet X/0/2
Packet X/0/3
Packet X/0/4
Packet X/0/5
Packet X/0/6
Packet X/0/7
Packet X/0/8
Packet X/0/9
Packet X/0/10
Packet X/0/11
Packet X/0/12
Packet X/0/13
Packet X/0/14
Packet X/0/15
Packet X/0/16
Packet X/0/17
Packet X/0/18
Packet X/0/19
Packet X/0/20
Packet X/0/21
Packet X/0/22
Packet X/0/23
Packet X/0/24
(1)
OSD only
Rolling time
Packet X/1/1
aw/ag
Packet X/1/4
Packet X/1/8
Packet X/1/12
Packet X/1/16
Packet X/1/20
Packet X/1 /24
(1)
Control Data
10
(2)
Fig.22 Packet storage locations, 525-line.
(1) If X24 POSN bit = 1.
(2) Byte 10 reserved.
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參數(shù)描述
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SAA5667HL 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Enhanced TV microcontrollers with On-Screen Display OSD
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