lc8905v Sanyo Semiconductor Corporation, lc8905v Datasheet - Page 13

• Manufacturer Part Number: lc8905v
• Description: Digital Audio Interface Receiver
• Manufacturer: Sanyo Semiconductor Corporation

3. The following output settings can be controlled:
• Channel status (C bit) output
• Subcode Q data output
• Status ID and shortening ID detection for DAT that use subcodes
C bit output
• This function presumes that this IC will be used in consumer mode and thus only handles the first 32 bits.
• The flag is fixed at the high level (although there is no flag in the type 1 microprocessor interface timing), and the
• Error and update checking is not applied to the data.
• The internal shift register is reset if a PLL lock error occurs.
• An interval of at least 6 msec must be provided between consecutive data readout operations.
Subcode Q output
• Subcode Q can be read out after the fall of the DQSY/LD signal. Also note that the data is updated every time this
• The flag outputs a high when the CRC check passes, and low if the CRC check fails.
• The bit order is LSB first within each byte of the 80 bits of subcode Q data.
ID detection
• The start ID and shortening ID are only detected when the DAT category code (1100000L) is received.
• These IDs are detected as follows:
• The table below shows the relationship between the sync signal (L
• Output pins
data format is LSB first.
signal falls. However, this signal will not be output (fall) unless 96 bits of subcode Q data (include the CRC check
bits) is input.
— A low pulse is output from DQSY/LD if a start ID (R
— After this signal, data can be read out from SRDT/DO by inputting the same address value as that used for
the data output.
The output scheme used for SRDT/DO differs depending on the microprocessor interface format selected by
CKSEL.
(L
(R
(L
Flags + 80 data bits
Detected ID
0
1
0
): SYNC
): Shortening ID
): Start ID
signal (L
subcode Q data to SWDT/DI.
CKSEL
H
L
0
).
Figure 4 User Data for DAT that Use Subcodes
Figure 2
Figure 3
Start ID
Format
all H
H
H
L
Three-state output
Open-drain output
Shortening ID
SRDT/DO
LC8905V
all L
H
H
L
0
) or a shortening ID (L
0
), the start ID (R
1
0
) is detected following a sync
), the shortening ID (L
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1
), and