TS-4100 ADC

This board supports four 12-bit ADC inputs using the i.MX6UL CPU's integrated ADC. All of these inputs can sample 0-12VDC or 4-20mA.

These ADCs are accessed through the Linux Industrial I/O Subsystem (IIO), which provides sample rates up to 6ksps across all inputs. The simplest API it offers for slow speed acquisition is via sysfs (/sys):

cat /sys/bus/iio/devices/iio:device0/in_voltage{5,8,9,0}_raw

The pin assignments and names for accessing each ADC input are:

Schematic Name	i.MX6UL ADC Signal	CN32 Terminal Pin	IIO name
AN_1_STC	ADC1_IN5	25	voltage5
AN_2_STC	ADC1_IN8	23	voltage8
AN_3_STC	ADC1_IN9	21	voltage9
AN_4_STC	ADC1_IN0	19	voltage0

See the TS-4100 section for a pinout illustration of the header, which is labeled CN32 on the schematic and silkscreen.