---
name: "pcyrtc"
section: "4"
platform: "openbsd"
package: "man"
version: "8.0-current-20261101"
release: "OpenBSD 8.0-current (2026-11-01)"
platforms: ["openbsd"]
url: "https://new.carta.tech/pcyrtc"
---

# pcyrtc(4)

NXP PCF85063A/TP real-time clock

## NAME

**pcyrtc** – NXP PCF85063A/TP real-time clock

## SYNOPSIS

**pcyrtc\* at iic? addr 0x51**

## DESCRIPTION

The **pcyrtc** driver provides support for the NXP PCF85063A/TP real-time clock chip.

## SEE ALSO

[iic(4)](/iic/4.md), [intro(4)](/intro/4.md)

## HISTORY

The **pcyrtc** driver first appeared in OpenBSD 7.1.

## AUTHORS

The **pcyrtc** driver was written by Mark Kettenis ⟨*kettenis@openbsd.org*⟩.