STA020(2010) Ver la hoja de datos (PDF) - STMicroelectronics
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STA020 Datasheet PDF : 14 Pages
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STA020
Figure 3. Audio Serial Port Formats.
FORMAT 0:
FSYNC(out)
SCK(out)
LEFT
RIGHT
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
LSB
MSB
FORMAT 3:
(RESERVED)
t(s) FORMAT 4:
FSYNC(in)
c SCK(in)
LEFT
RIGHT
du SDATA(in)
ro FORMAT 5:
P FSYNC(in)
MSB
LSB
LEFT
MSB
LSB
RIGHT
MSB
te SCK(in)
le SDATA(in) LSB
MSB
LSB
MSB
LSB
so FORMAT 6:
b FSYNC(in)
O SCK(in)
16 Bits
LEFT
16 Bits
RIGHT
) - SDATA(in) LSB
MSB
LSB
MSB
LSB
t(s FORMAT 7:
c FSYNC(in)
18 Bits
LEFT
18 Bits
RIGHT
du SCK(in)
ProSDATA(in) MSB
LSB
MSB
LSB
MSB
D97AU604
lete C, U, V Serial Port
o The serial input pins for channel status (C), user (U), and validity (V) are sampled during the first bit period
s after the active edge of FSYNC for all formats except Format 4. Format 4 is sampled during the second
Obbit 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 conversion 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 input 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 logically OR’ed with the data entered through the dedicated pins or internally gen-
erated.
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