diff options
Diffstat (limited to 'share')
| -rw-r--r-- | share/man/man4/man4.i386/elansc.4 | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/share/man/man4/man4.i386/elansc.4 b/share/man/man4/man4.i386/elansc.4 index 8e9289885ba..6e4eb712870 100644 --- a/share/man/man4/man4.i386/elansc.4 +++ b/share/man/man4/man4.i386/elansc.4 @@ -1,4 +1,4 @@ -.\" $OpenBSD: elansc.4,v 1.7 2003/08/07 08:33:10 markus Exp $ +.\" $OpenBSD: elansc.4,v 1.8 2004/06/05 15:09:10 grange Exp $ .\" $NetBSD: elansc.4,v 1.1 2002/08/12 03:45:25 thorpej Exp $ .\" .\" Copyright (c) 2002 The NetBSD Foundation, Inc. @@ -60,15 +60,36 @@ driver: Watchdog timer. The watchdog timer may be configured for a 1 second, 2 second, 4 second, 8 second, 16 second, or 32 second expiration period. +.It +Programmable Input/Output. +The SC520 microcontroller supports 32 programmable I/O signals (PIOs) +that can be used on the system board to monitor signals or control devices +that are not handled by the other functions in the SC520 microcontroller. +These signals can be programmed to be inputs or to be driven out +.Dq high +or +.Dq low +as outputs. +Pins can be accessed through the +.Xr gpio 4 +framework. +The +.Xr gpioctl 8 +program allows to easily manipulate pins from userland. .El .Sh SEE ALSO .Xr geodesc 4 , +.Xr gpio 4 , +.Xr intro 4 , +.Xr gpioctl 8 , .Xr sysctl 8 .Sh HISTORY Support for the .Nm was added in .Ox 3.3 . +PIO function support appeared in +.Ox 3.6 . .Sh AUTHORS The .Nm @@ -77,3 +98,5 @@ driver was written by .An Jasper Wallace provided the work-around for a hardware bug related to the watchdog timer in some steppings of the SC520 CPU. +.An Alexander Yurchenko Aq grange@openbsd.org +added support for the PIO function. |