LC89075W-H SANYO [Sanyo Semicon Device], LC89075W-H Datasheet - Page 33

• Manufacturer Part Number: LC89075W-H
• Description: Digital Audio Interface Receiver with Stereo ADC and Audio Selector
• Manufacturer: SANYO [Sanyo Semicon Device]

10.5 Data Delimiter Bit 1 Output (NPCMF)
• NPCMF outputs the channel status data delimiter bit information.
• NPCMF outputs bit 1 of the channel status that indicates whether the input bi-phase data is PCM audio data. NPCMF
• The IEC61937 and the DTS-CD detection flags can be output to NPCMF according to the NPSEL register.
10.6 IEC61937 and DTS-CD Detection Flag Output
• A function to output IEC61937 and DTS-CD detection flags for non-PCM data are provided.
• When bit 1 of the channel status is non-PCM data, the IEC61937 sync signal is detected and detection flag is output.
• The DTS-CD detection is compatible with “14-bit format” and it is done based on the sync pattern and the base
• The IEC61937 and DTS-CD detection flags can be readout with the microcontroller interface in addition to output to
• The detection flags are cleared when fs changes or when a PLL lock error or data error occurs.
10.7 Calculation of digital input data sampling frequency
• The input data sampling frequency is calculated using the XIN clock.
• If the oscillation amplifier is in a continuous operation mode, calculation is repeated constantly. Even if sampling
• In the mode where the oscillation amplifier automatically stops according to the lock status of the PLL, the input data
• The calculation results can be readout with the microcontroller interface. (RXFSC[3:0] register readout)
• The input data sampling frequency calculation value and channel status fs information are compared and if the
is immediately output upon detection of ERRF even during the “H” output period.
If bit 1 is PCM data, detection flag is not output.
frequency. The sync pattern is checked every 4096th frame, and the detection status is held until the sync pattern is no
longer verified.
NPCMF by the NPSEL register. When the UNPCM register of non-PCM signal output setting is selected through the
INTB output contents setting, an interrupt signal is output from INTB detecting an IEC61937 or DTS-CD sync signal.
This information is used to read out the output register and identify the details of the non-PCM signal.
changes within the PLL capture range for input data whose channel status sampling information does not change, the
calculation results that follow the input data can be read.
sampling frequency is calculated during the ERRF error period and completed when the oscillation amplifier stops
with holding the value. Therefore, the value remains unchanged until the PLL becomes unlocked.
sampling frequency is a same deal, “1” is read from the RXFSFLG register.
NPCMF
H
L
Table 10.6 NPCMF Output
LC89075W-H
Non-PCM audio data (bit 1 = “H”)
PCM audio data (bit 1 = “L”)
Output Conditions
No.A1858-33/69