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ECADC(4) Device Drivers Manual (sparc64) ECADC(4)

ecadcenvironmental monitoring subsystem temperature sensor

ecadc* at iic?

The ecadc driver supports the PCF8591 I2C analog to digital converter that is part of the environmental monitoring subsystem found on the Sun Enterprise 250 and Sun Enterprise 450 systems. The temperature readings are made available through the sysctl(8) interface.

The driver reads up to four A/D lines configured as temperature inputs. Sensor names, type and calibration information are read from OpenFirmware.

iic(4), intro(4), pcfadc(4), sensorsd(8), sysctl(8)

The ecadc driver first appeared in OpenBSD 4.3.

The ecadc driver was written by Mark Kettenis <> based on the pcfadc(4) driver written by Damien Miller <>.

July 16, 2013 OpenBSD-7.1