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2 .\" SPDX-License-Identifier: BSD-2-Clause
32 .Nd driver for the PCF8591 8-bit A/D and D/A converter
37 .Bd -ragged -offset indent
45 .Bd -literal -offset indent
53 .Bl -bullet
55 four single-ended inputs
57 three differential inputs (one input line is shared between all three inputs)
59 two single-ended inputs and one differential input
71 .Bl -tag -width inputs.%d
73 The input level of the corresponding input in steps between 0 and 255.
80 .Bl -tag -width "compatible"
86 It should be in the range from 0x40 to 0x4f (7-bit).
92 .Bd -literal
115 All input lines are configured as single-ended inputs.
120 It is always disabled (tri-state).