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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 <>.

November 20, 2018 OpenBSD-current