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OWCTR(4) Device Drivers Manual OWCTR(4)

owctr1-Wire counter device

owctr* at onewire?

The owctr driver provides support for the externally triggered counters on the DS2423 chip. The supported chip contains a 4096-bit SRAM and four 32-bit counters. The two externally triggered counters are accessible by the sysctl(8) interface.

The following chips are supported by the driver:

intro(4), onewire(4), owsbm(4), owtemp(4), sysctl(8)

The owctr driver first appeared in OpenBSD 4.8.

The owctr driver was written by John L. Scarfone <>.

July 16, 2013 OpenBSD-6.8