STA020 View Datasheet(PDF) - STMicroelectronics
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Description
Manufacturer
STA020 Datasheet PDF : 12 Pages
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STA020
Figure 3. Audio Serial Port Formats.
FORMAT 0:
FSYNC(out)
LEFT
RIGHT
SCK(out)
SDATA(in)
MSB
FORMAT 1:
FSYNC(in)
SCK(in)
LSB
MSB
LEFT
LSB
MSB
RIGHT
SDATA(in)
MSB
FORMAT 2:
FSYNC(in)
SCK(in)
LSB
MSB
LEFT
LSB
MSB
RIGHT
SDATA(in)
MSB
LSB
MSB
FORMAT 3:
(RESERVED)
FORMAT 4:
FSYNC(in)
LEFT
RIGHT
LSB
MSB
SCK(in)
SDATA(in)
FORMAT 5:
FSYNC(in)
SCK(in)
MSB
LSB
LEFT
MSB
LSB
RIGHT
MSB
SDATA(in) LSB
MSB
LSB
MSB
LSB
FORMAT 6:
FSYNC(in)
SCK(in)
16 Bits
LEFT
16 Bits
RIGHT
SDATA(in) LSB
MSB
LSB
MSB
LSB
FORMAT 7:
FSYNC(in)
SCK(in)
18 Bits
LEFT
18 Bits
RIGHT
SDATA(in) MSB
LSB
MSB
LSB
MSB
D97AU604
C, U, V Serial Port
The serial input pins for channel status (C), user
(U), and validity (V) are sampled during the first
bit period after the active edge of FSYNC for all
formats except Format 4. Format 4 is sampled
during the second bit period (coincident with the
MSB). In Figure 3, the arrows on SCK indicate
when the C, U, and V bits are sampled. The C, U,
and V bits are transmitted with the audio sample
entered before FSYNC edge that sampled it. The
V bit, as defined in the audio standards, is set to
zero to indicate the audio data is suitable for con-
version to analog. Therefore, when the audio
data is errored, or the data is not audio, the V bit
should be set high. The channel status serial in-
put pin (C) is not available in consumer mode
when the CD subcode port is enabled (FC1 =
FC0 = high). Any channel status data entered
through the channel status serial input (C) is logi-
cally OR’ed with the data entered through the
dedicated pins or internally generated.
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