---
name: "islrtc"
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/islrtc"
---

# islrtc(4)

Intersil ISL1208/1218 real-time clock

## NAME

**islrtc** – Intersil ISL1208/1218 real-time clock

## SYNOPSIS

**islrtc\* at iic? addr 0x6f**

## DESCRIPTION

The **islrtc** driver provides support for the Intersil/Renesas ISL1208 and ISL1218 real-time clock chips.

## SEE ALSO

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

## HISTORY

The **islrtc** driver first appeared in OpenBSD 6.4.

## AUTHORS

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