MMC & CF memory was Using 3.5" HD drives on CP/M systems

[Randy McLaughlin]

From: <jpero at sympatico.ca>
Sent: Wednesday, February 02, 2005 1:32 PM
<snip>
>> MMC is a snap to implement, the only "problems" are efficiently driving 
>> it
>> at a reasonable speed and they are 3.3v.  MMC uses a very simple serial
>> interface where every bit is clocked in or out by the host system.  It 
>> can
>> be done entirely in software by shifting each bit in or out but then it 
>> is
>> sloooow.
>
> What kind of protocol that MMC talks in serial fashion?

SPI.

<snip>

Randy
www.s100-manuals.com