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參數資料
| 型號： | LC89057W-VF4 |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP48 |
| 封裝： | 7 X 7 MM, SQFP-48 |
| 文件頁數： | 22/61頁 |
| 文件大小： | 570K |
| 代理商： | LC89057W-VF4 |
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LC89057W-VF4
No.7202-29/61
9.7 IEC61937, DTS-CD/LD Detection Flag Output
A function to output IEC61937 and DTS-CD/LD detection flags for non-PCM data is provided.
When the UNPCM of non-PCM signal output setting is selected through the
______
INT output contents setting, an interrupt
signal is output from
______
INT detecting an IEC61937 or DTS-CD/LD sync signal. Details of Non-PCM signal can be
seen by reading output register from this information.
When bit 1 of channel status is non-PCM data ("1"), the IEC61937 sync signal is detected and output. If bit 1 is PCM
data, the IEC61937 sync signal is not output.
DTS-CD/LD sync signal detection is done based on the sync pattern and the base frequency. DTS-ES data detection is
output when the DTS5.1 channel sync signal is detected and the DTS-ES sync pattern is verified.
The IEC61937 and DTS-CD/LD detection flags are cleared when fs has changed or a PLL lock error or data error has
occurred.
Since the DTS sync signal is provided within the audio data, digital data with the same code as the DTS sync signal
may exist in rare cases for regular CD/LD records that are not recorded in the DTS format. Protection using the sync
pattern or base frequency is provided so that such data is not misinterpreted as DTS-CD/LD detection flags. The
detection sequence is shown below.
Figure 9.15 IEC61937 and DTS-CD/LD Detection Sequence
Frame count
512, 1024, 2048, 4096
SYNC detection
NO
YES
NO
YES
NO
YES
NO
YES
PaPb detection
during 4096
frames
Input data
DTS-CD/LD SYNC
detection
*
*Depending on the frame count,
the subsequent detection count is
expanded up to
×2.
Periodic fluctuation is supported.
1st count
2nd count
512
→
512 or 1024
1024
→
1024 or 2048
2048
→
2048 or 4069
4069
→
4069
DTS-CD/LD
data hold
Frame count hold
× 2 count detection
expansion
IEC61937 flag OK
INT lowered
Frame counter start
YES
NO
YES
Bit1 detection
Bit1=1
IEC61937 data hold
Frame counter reset
IEC61937 flag
not valid
INT lowered
PaPb detection
during 4096
frames
Frame counter start
Frame counter reset
DTS-CD/LD flag OK
INT lowered
DTS-CD/LD flag
not valid
INT lowered
Frame count
512, 1024, 2048, 4096
SYNC detection
*
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LC89057W-VF4AD-E | 制造商:ON Semiconductor 功能描述: |
| LC89057W-VF4A-E | 功能描述:音頻發送器、接收器、收發器 RoHS:否 制造商:Cirrus Logic 工作電源電壓:3.3 V, 5 V 電源電流:11.8 mA 通道數量:1 最大工作溫度:+ 70 C 接口類型:I2C, SPI 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-28 封裝: |
| LC89057W-VF4A-TBM-E | 制造商:ON Semiconductor 功能描述: 制造商:ON Semiconductor 功能描述:AUDIO I/F RECEIVER |
| LC89058W | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:CMOS IC Digital Audio Interface Receiver |
| LC89058WA-E | 功能描述:音頻發送器、接收器、收發器 RoHS:否 制造商:Cirrus Logic 工作電源電壓:3.3 V, 5 V 電源電流:11.8 mA 通道數量:1 最大工作溫度:+ 70 C 接口類型:I2C, SPI 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-28 封裝: |
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