Manual Page Search Parameters

IT(4) Device Drivers Manual IT(4)


itITE IT87xxF and SiS SiS950 temperature, voltage, and fan sensor with watchdog timer


it* at isa? port 0x2e
it* at isa? port 0x4e


The it driver provides support for the ITE IT8705F, IT8712F, IT8716F, IT8718F, IT8720F, IT8726F, IT8728F, IT8772F and SiS SiS950 hardware monitors and watchdog(4) timer to be used with the sysctl(8) interface.
Most supported devices possess 17 sensors:
Sensor Units Typical Use
temp0 uK CPU Temperature
temp1 uK Motherboard Temperature
temp2 uK Unused
fan0 RPM CPU Fan
fan1 RPM Chassis Fan
fan2 RPM Power Fan
fan3 RPM Unused
fan4 RPM Unused
volt0 uV DC Core voltage
volt1 uV DC Core voltage
volt2 uV DC +3.3V
volt3 uV DC +5V
volt4 uV DC +12V
volt5 uV DC -12V
volt6 uV DC -5V
volt7 uV DC +5VSB
volt8 uV DC VBAT


isa(4), watchdog(4), sensorsd(8), sysctl(8), watchdogd(8)


The it driver first appeared in OpenBSD 3.4.


The it driver was originally written for OpenBSD 3.4 by Julien Bordet <zejames@greyhats.org>, and completely rewritten for OpenBSD 4.3 by Oleg Safiullin <form@pdp-11.org.ru>.


Watchdog timer functionality is not supported for ITE IT8705 or SiS SiS950 chips. For older IT8712 chips, watchdog timeout values of more than 255 seconds are rounded up to the nearest minute.
September 10, 2015 OpenBSD-current