MMC modes of operation
CASTalk.com Forum Index CASTalk.com
Discussion of DSP, FPGA, storage and embedded system.
 
 FAQFAQ   MemberlistMemberlist     RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 
 
Google
 
Web castalk.com
MMC modes of operation

 
Post new topic   Reply to topic    CASTalk.com Forum Index -> Embedded System
Author Message
Guest
Posted: Thu Jan 06, 2005 7:56 am    Post subject: MMC modes of operation Reply with quote
Hi all,

I hope someone can help me out with a simple question about interfacing
to an MMC/SD card.

I wish to talk to card via MMC mode. Does that mean that pin 1 of the
MMC card should be driven with a logic high signal, or should be it be
left floating?

I understand that by driving a logic low signal onto pin 1 of the MMC
card will select it and put it into SPI mode.
Can anyone confirm that?

thanks,
Back to top
Amit Malyala
Guest
Posted: Fri Jan 07, 2005 5:01 am    Post subject: Re: MMC modes of operation Reply with quote
Hi ,

the pin 1 of MMC should be in Logical high mode.

check the MMC manual at
http://www.mmca.org/tech/MMC-System-Summary-v3.31.pdf

see page 24: There is a table which lists , how the pins should be in
MMC and SPI modes.

Hope this helps.
Amit.
Back to top
 
Post new topic   Reply to topic    CASTalk.com Forum Index -> Embedded System All times are GMT
Page 1 of 1

 
 You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum




VoIP Electronics Powered by phpBB