LFTON is the signal that enables/disables the input fasrOr receivers.
It is zero if the direction is set to right, the deaf bit is set or
for the chip address is 24 (?).
KW0 - KW2
clocks to load the registers. KW0 (data), KW1(calib), KW2(triger)
KR0 - KR2
The same as KW but for reading the registers.
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