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參數(shù)資料
| 型號： | SAA5250 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Interface for data acquisition and control for multi-standard teletext systems |
| 中文描述： | 接口數(shù)據(jù)采集和控制的多標準圖文電視系統(tǒng) |
| 文件頁數(shù)： | 7/35頁 |
| 文件大小： | 173K |
| 代理商： | SAA5250 |
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January 1987
7
Philips Semiconductors
Product specification
Interface for data acquisition and control
(for multi-standard teletext systems)
SAA5250
Register organization
R0 register
Table 3
R0 Register contents
All of the bytes (see Fig.3) are Hamming protected. The hatched bytes are always stored in the memory in order to be
processed by the CPU (see section ‘Prefix processing’). In the mode without prefix all of the bytes which follow the
framing code are stored in the memory until the end of the data packet, the format is then determined by the contents of
the R3 register.
If R03 = 0; no parity control is carried out and the 8-bits of the incoming data bytes are stored in the fifo memory.
If R03 = 1; the 8th bit of the bytes following the prefix (data bytes) represents the result of the odd parity control.
If R04 = 0; the device operates in the slow mode. The CIDAC retrieves data from the user selected magazine (see
section ‘R1 and R2’) and without searching for a start to a page stores the data into the FIFO memory.
R04
SLOW/FAST MODE
R03
PARITY
R02 TO R00
USED PREFIXES
0 = slow mode
1 = fast mode
0 = no parity control
1 = odd parity
000 = DIDON long
001 = DIDON medium
010 = DIDON short
011 = not used
100 = U.K. teletext
101 = NABTS
110 = without prefix
111 = without prefix
Fig.3 Five prefixes.
handbook, full pagewidth
MGH077
CI
format
A3
A2
A2
format
A1
A1
A
FC
FC
FC
FC
DIDON
short
DIDON
medium
DIDON
long
CI
PS
A3
A2
A1
FC
NABTS
magazine and row address group
MRAG
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SAA5250P | Interface for data acquisition and control for multi-standard teletext systems |
| SAA5250T | Interface for data acquisition and control for multi-standard teletext systems |
| SAA5252 | Line twenty-one acquisition and display LITOD |
| SAA5252P | Line twenty-one acquisition and display LITOD |
| SAA5252T | Line twenty-one acquisition and display LITOD |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SAA5250P | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Interface for data acquisition and control for multi-standard teletext systems |
| SAA5250T | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Interface for data acquisition and control for multi-standard teletext systems |
| SAA5252 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Line twenty-one acquisition and display LITOD |
| SAA5252P | 制造商:NXP Semiconductors 功能描述:TELETEXT DECODER, PDIP24 |
| SAA5252T | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Line twenty-one acquisition and display LITOD |
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