LC89075W-H SANYO [Sanyo Semicon Device], LC89075W-H Datasheet - Page 31

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

10.4 Error Output Processing
10.4.1 Lock Error and Data Error Output (ERRF)
• ERRF outputs an error flag when a PLL lock error or a data error occurs.
• It is possible to treat non-PCM data reception as an error by setting up the RXRESEL register.
• The ERRF output conditions are set with the RXRESTA register.
10.4.2 PLL Lock Error
• The PLL gets unlocked for input data that lost bi-phase modulation regularity, or input data for which preambles B, M,
• ERRF turns to "H" upon occurrence of a PLL lock error, and returns to "L" when data demodulation returns to normal
• ERRF pulse output polarity can be changed with the DIRERRP register.
• ERRF is output in synchronization with LRCKOUT.
10.4.3 Input Data Parity Error
• An odd number of errors among parity bits in input data and input parity errors are detected.
• If an input parity error occurs 9 or more times in succession, ERRF turns to "H" indicating that the PLL is locked, and
• The error flag output format can be selected with the RXREDER register when an input parity error is output 8 or
10.4.4 Other Errors
• Even if ERRF turns to "L," the channel status bits of 24 to 27 (sampling frequency information) are always fetched
• In order to support sources with a variable fs (for example, a CD player with a variable pitch function), any change in
• To have the change in fs made after the resetting of ERRF reflected on ERRF, set the “RXREFSJ=1”.
• If a setting which regards non-PCM data input as an error is made with the RXRESEL register, ERRF turns to "H"
• The PLL is set to the unlock state when the ADC clock and the data output have been selected by
and W cannot be detected.
and "H" is held for somewhere between 3ms to 144ms. This hold time is determined by the setting of the
RXERWT[1:0] register.
after holding "H" for somewhere between 3ms to 144ms, it returns to "L."
fewer times in succession.
and the data of the previous block is compared with the current data. Moreover, the input data sampling frequency is
calculated from the fs clock extracted from the input data, and the fs calculated value is compared in the same way as
described above. If any difference is detected in these data, ERRF is instantly made "H" and the same processing as
for PLL lock errors is carried out. In this case, the clock source is switched to XIN and processing is restarted at lock
status identification processing.
fs made after ERRF is reset is not reflected on ERRF unless such change exceeds the PLL capture range.
when non-PCM data input is detected. At this time, the PLL locked status and respective output clocks are subject to
the input data, but the output data is muted. The non-PCM data is the information that is output from NPCMF and
subject to the NPSEL register setting.
“SW1SEL[2:0]=001” and ERRF outputs the error flag.
LC89075W-H
No.A1858-31/69