cs8413-cs Cirrus Logic, Inc., cs8413-cs Datasheet - Page 23

• Manufacturer Part Number: cs8413-cs
• Description: 96 Khz Digital Audio Receivers
• Manufacturer: Cirrus Logic, Inc.

leaving the reset state. The CS8414 should be reset
immediately after power-up and any time the user
performs a system-wide reset. See Appendix B for
a suggested reset circuit.
C, U, VERF, ERF, and CBL Serial Outputs
The C and U bits and CBL are output one SCK pe-
riod prior to the active edge of FSYNC in all serial
port formats except 2 and 3 (I
edge of FSYNC may be used to latch C, U, and
CBL externally. In formats 2 and 3, the C and U
bits and CBL are updated with the active edge of
FSYNC. The validity + error flag (VERF) and the
error flag (ERF) are always updated at the active
edge of FSYNC. This timing is illustrated in
Figure 19.
DS240F1
SDATA
FSYNC
Ca-Ce
VERF
ERF,
C, U
CBL
C0,
12*
13*
No.
* Error flags are not accurate in these modes
Right 191
FSYNC (out)
FSYNC (out)
SDATA (out)
SDATA (out)
SCK (out)
SCK (out)
Left 0
2
S modes). The active
Figure 18. Special Audio Port Formats 12 and 13
AUX
AUX
Right 0
LSB
LSB
Left
Left
Figure 19. CBL Timing
Left 1
MSB V U C P
MSB
V U C P
The C output contains the channel status bits with
CBL rising indicating the start of a new channel
status block. CBL is high for the first four bytes of
channel status (32 frames or 64 samples) and low
for the last 20 bytes of channel status (160 frames
or 320 samples). The U output contains the User
Channel data. The V bit is OR’ed with the ERF flag
and output on the VERF pin. This indicates that the
audio sample may be in error and can be used by in-
terpolation filters to interpolate through the error.
ERF being high indicates a serious error occurred
on the transmission line. There are three errors that
cause ERF to go high: a parity error or biphase cod-
ing violation during that sample, or an out of lock
PLL receiver. Timing for the above pins is illustrat-
ed in Figure 19.
Right 31
Left 32
AUX
AUX
LSB
LSB
Right
Right
CS8413 CS8414
Right 191
MSB V U C P
MSB
V U C P
Left 0
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