I2SCFGR

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Interpret as I2SCFGR

configuration register

CHLEN	Channel length (number of bits per audio channel)
DATLEN	Data length to be transferred
CKPOL	Inactive state clock polarity
I2SSTD	standard selection
PCMSYNC	PCM frame synchronization
I2SCFG	I2S configuration mode
SE2	I2S enable
I2SMOD	I2S mode selection

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