Datasheet

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TLV320AIC12, TLV320AIC13
TLV320AIC14, TLV320AIC15
TLV320AIC12K, TLV320AIC14K
SLWS115E – OCTOBER 2001 – REVISED JANUARY 2007
the master's FS. The master FSD is output to the first slave and the first slave's FSD is output to the second
slave device and so on. When the codecs are configured in cascade mode, MCLK must be connected in star
configuration to ensure that MCLK can propagate simultaneously to all the codecs in the chain in less then 2 ps.
Figure 32 shows the cascade of 4 TLV320AIC1xs in which the closest one to DSP is the master and the rest are
slaves. The FSD output of each device is input to the FS terminal of the succeeding device. Figure 30 shows the
FSD timing sequence in the cascade.
Stand-Alone Slave
In the stand-alone slave connection, the FS and SCLK are input in which they need to be synchronized to each
other and programmed according to the Operating Frequencies section of this data sheet. The FS and SCLK
input are not required to synchronize to the MCLK input but must remain active at all times to assure continuous
sampling in the data converter. FS is output for initial 132 MCLK and it is kept low. DSP needs to keep FS low or
high-impedance state for this period to avoid contention on FS.
In addition, SCLK must be running at all times when the device is put into reset when in slave mode.
32
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