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20 The PCF8591 is an 8-bit A/D and D/A converter (4 analog inputs and one
33 - mode 2 : single ended and differential mixed
34 Pins AIN0 and AIN1 are single ended inputs for channels 0 and 1
54 2 = single ended and differential mixed
71 and <1> the chip address ([48..4f])
78 The in0_input, in1_input, in2_input and in3_input files are RO. Reading gives
80 configuration, files in2_input and in3_input may not exist. Values range
81 from 0 to 255 for single ended inputs and -128 to +127 for differential inputs
84 The out0_enable file is RW. Reading gives "1" for analog output enabled and
85 "0" for analog output disabled. Writing accepts "0" and "1" accordingly.
87 The out0_output file is RW. Writing a number between 0 and 255 (8-bit DAC), send