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DSR
MK50H25
DATA SET READY is used to control or observe the DSR I/O
pin depending on the value of DSRD. If DSRD = 0, this bit be-
comes READ ONLY and always equals the current value of the
DSR/CTS pin. If DSRD = 1 this bit becomes READ/WRITE and
any value written to this bit appears on the DSR/CTS pin.
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