1.\" $OpenBSD: maxrtc.4,v 1.4 2022/10/25 05:49:40 jmc Exp $ 2.\" 3.\" Copyright (c) 2006 Theo de Raadt <deraadt@openbsd.org> 4.\" Copyright (c) 2016 Marcus Glocker <mglocker@openbsd.org> 5.\" 6.\" Permission to use, copy, modify, and distribute this software for any 7.\" purpose with or without fee is hereby granted, provided that the above 8.\" copyright notice and this permission notice appear in all copies. 9.\" 10.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17.\" 18.Dd $Mdocdate: October 25 2022 $ 19.Dt MAXRTC 4 20.Os 21.Sh NAME 22.Nm maxrtc 23.Nd Maxim DS1307/DS1339 real-time clock 24.Sh SYNOPSIS 25.Cd "maxrtc* at iic?" 26.Sh DESCRIPTION 27The 28.Nm 29driver supports the Maxim DS1307 and DS1339 real-time clock chips, 30which provide a low-power, full binary-coded decimal (BCD) clock/calendar. 31In addition, the DS1307 comes with 56 bytes of NV SRAM. 32.Sh SEE ALSO 33.Xr iic 4 , 34.Xr intro 4 35.Sh HISTORY 36The 37.Nm 38driver first appeared in 39.Ox 6.0 . 40.Sh AUTHORS 41.An -nosplit 42The 43.Nm 44driver was written by 45.An Marcus Glocker Aq Mt mglocker@openbsd.org . 46