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PCFRTC(4) Device Drivers Manual PCFRTC(4)

pcfrtcNXP PCF8523 Real Time Clock

pcfrtc* at iic? addr 0x68

The pcfrtc driver provides support for the NXP PCF8523 Real Time Clock chip.

iic(4), intro(4)

The pcfrtc driver first appeared in OpenBSD 6.0.

The pcfrtc driver was written by Mark Kettenis <>.

May 16, 2016 OpenBSD-6.3