nordic,nrf-comp

Overview

Name:

nordic,nrf-comp

Vendor:

Nordic Semiconductor

Used in:

List of boards using this compatible

Driver:

drivers/comparator/comparator_nrf_comp.c

Description

Nordic nRF COMP (analog COMParator)

This comparator has varying configurations which require varying
properties be set in the devicetree.

The following example displays the minimum node layout:

  comp: comp@deadbeef {
          compatible = "nordic,nrf-comp";
          reg = <0xdeadbeef 0x1000>;
          interrupts = <0 NRF_DEFAULT_IRQ_PRIORITY>;
          status = "disabled";
  };

Enabling the comparator node requires setting the default
configuration of the comparator.

The following example displays enabling the comparator in
single-ended mode, selecting an internal reference:

  &comp {
          status = "okay";
          main-mode = "SE";
          psel = <NRF_COMP_AIN0>;
          refsel = "INT_1V2";
          sp-mode = "NORMAL";
          th-up = <36>;
          th-down = <30>;
          isource = "DISABLED";
  };

To select an external reference, select the "AREF"
reference and add the external reference:

  &comp {
          ...
          refsel = "AREF";
          extrefsel = <NRF_COMP_AIN1>;
          ...
  };

The following example displays enabling the comparator
in differential mode:

  &comp {
          status = "okay";
          main-mode = "DIFF";
          psel = <NRF_COMP_AIN0>;
          extrefsel = <NRF_COMP_AIN1>;
          sp-mode = "NORMAL";
          enable-hyst;
          isource = "DISABLED";
  };

Properties

Node specific propertiesDeprecated node specific propertiesBase properties

Properties not inherited from the base binding file.

Name	Type	Details
main-mode	string	Legal values: SE, DIFF
psel	int
extrefsel	int
refsel	string	Legal values: INT_1V2, INT_1V8, INT_2V4, AVDDAO1V8, VDD, AREF
enable-hyst	boolean
sp-mode	string	Legal values: LOW, NORMAL, HIGH
th-up	int
th-down	int
isource	string	Legal values: DISABLED, 2UA5, 5UA, 10UA