cs4924 Cirrus Logic, Inc., cs4924 Datasheet - Page 52

• Manufacturer Part Number: cs4924
• Description: Multi-channel Digital Audio Decoders Logic
• Manufacturer: Cirrus Logic, Inc.

AUDATA1—Digital Audio Output 1: Pin 40
AUDATA0—Digital Audio Output 0: Pin 41
MCLK—Audio Master Clock: Pin 44
SCLK—Audio Output Bit Clock: Pin 43
LRCLK—Audio Output Sample Rate Clock: Pin 42
XMT958—SPDIF Transmitter Output: Pin 3
SCLKN1, STCCLK2—PCM Audio Input Bit Clock: Pin 25
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PCM multi-format digital-audio data output, capable of two-channel 20-bit output. This PCM
output defaults to DGND as output until enabled by the DSP software. OUTPUT
PCM multi-format digital-audio data output, capable of two-, four-, or six-channel 20-bit
output. This PCM output defaults to DGND as output until enabled by the DSP software.
OUTPUT
Bidirectional master audio clock. MCLK can be an output from the CS4923/4/5/6/7/8/9 that
provides an oversampled audio-output clock at either 128 Fs, 256 Fs, or 512 Fs. MCLK can be
an input at 128 Fs, 256 Fs, 384 Fs, or 512 Fs. MCLK is used to derive SCLK and LRCLK
when SCLK and LRCLK are driven by the CS492X. BIDIRECTIONAL - Default: INPUT
Bidirectional digital-audio output bit clock. SCLK can be an output that is derived from MCLK
to provide 32 Fs, 64 Fs, 128 Fs, 256 Fs, or 512 Fs, depending on the MCLK rate and the
digital-output configuration. SCLK can also be an input and must be at least 48Fs or greater.
As an input, SCLK is independent of MCLK. BIDIRECTIONAL - Default: INPUT
Bidirectional digital-audio output-sample-rate clock. LRCLK can be an output that is divided
from MCLK to provide the output sample rate depending on the output configuration. LRCLK
can also be an input. As an input LRCLK is independent of MCLK.
BIDIRECTIONAL - Default: INPUT
CMOS level output that contains a biphase-encoded clock for synchronously providing two
channels of PCM digital audio or a IEC61937 compressed-data interface or both. This output
typically connects to the input of an RS-422 transmitter or to the input of an optical transmitter.
OUTPUT
Bidirectional digital-audio bit clock that is an output in master mode and an input in slave
mode. In slave mode, SCLKN1 operates asynchronously from all other CS492X clocks. In
master mode, SCLKN1 is derived from the CS492X internal clock generator. In either master
or slave mode, the active edge of SCLKN1 can be programmed by the DSP. For applications
supporting PES layer synchronization this pin can be used as STCCLK2, which provides a path
to the internal STC 33 bit counter. BIDIRECTIONAL - Default: INPUT
CS4923/4/5/6/7/8/9
DS262F2