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參數資料
| 型號： | LC7074 |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDIP18 |
| 封裝： | DIP-18 |
| 文件頁數： | 5/17頁 |
| 文件大小： | 237K |
| 代理商： | LC7074 |
LC7074, 7074M
No.4789–13/17
5. Group Synchronization
Recognized Offset Words
The LC7074/M recognizes the five offset words A, B, C, C’ and D. The offset word F, which is stipulated by the EBU,
is not recognized.
Group Data Ordering and Synchronization
The LC7074/M recognizes the following three types of group data.
However, there is no limitation on the number of blocks in groups consisting of offset E blocks (type 3).
(1) A – B – C – D
(2) A – B – C’ – D
(3) E – E – E – E
E – E – E
E – E
E
As a result, there are nine block data orders (listed as (1) to (9) below) that the LC7074/M recognizes, and any other
order is determined to be an error.
Correct data orders
Data orders handled as errors
(1) A
→ BA → C
(2) B
→ CB → E
(3) B
→ C’
E
→ B
(4) C
→ D
(5) C’
→ D
(6) D
→ A
(7) D
→ E
(8) E
→ E
(9) E
→ A
The data input wait state is called a synchronization sequence. When a clock signal is first input to the LC7074/M
from the demodulation IC, the LC7074/M starts the operation of detecting offset words from data synchronized with
the clock.
The LC7074/M synchronizes with the input data when it detects two blocks with correct offset words in correct
positions.
Synchronization with RDS Group Data
– RDS block data format
RDS Group Format
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