mmc (4)

Leading comments

Copyright (c) 2007 M. Warner Losh
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
2. The name of the author may not be used to endorse or promote products
   derived from this software without specific prior written permission.

THIS SOFTWARE IS PRO...

(The comments found at the beginning of the groff file "man4/mmc.4freebsd".)

NAME

mmc - MultiMediaCard and SD Card bus driver

SYNOPSIS

device mmc

DESCRIPTION

The ifconfig driver implements the MMC and SD Card bus. The ifconfig driver supports all MMC and SD bridges in the system. All SD or MMC cards in the system attach to an instance of . The ifconfig bus typically has only one slot, and only memory cards. MultiMediaCards exist only in memory. SD Cards exist as memory, I/O, or combination cards.

SEE ALSO

mmcsd(4), at91_mci4, sdhci(4)

"SD Specifications, Part 1, Physical Layer, Simplified Specification"

"The MultiMediaCard System Specification"

BUGS

SDIO cards currently do not work.