All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 4 posts ] 
Author Message
 Post subject: SD/EMMC SPI MODE
PostPosted: November 4th, 2017, 14:58 
Offline

Joined: January 28th, 2017, 21:34
Posts: 15
Location: NH BELMONT
Why is there not one card reader capable of using SPI or atleast enabled??..I do have sd card adapters that are spi but trying to get an image is no fun...Does anyone think i could just inject some commands with buspirate to enable SPI then use the same reader to make an dump...This is of course only if SPI is working and not regular mode..Thanks for any input!!


Top
 Profile  
 
 Post subject: Re: SD/EMMC SPI MODE
PostPosted: November 4th, 2017, 19:20 
Offline
User avatar

Joined: September 8th, 2009, 18:21
Posts: 9746
Location: Australia
https://en.wikipedia.org/wiki/Secure_Digital

Quote:
At initial power-up or card insertion, the host device selects either the Serial Peripheral Interface (SPI) bus or the one-bit SD bus by the voltage level present on Pin 1. Thereafter, the host device may issue a command to switch to the four-bit SD bus interface, if the SD card supports it.

https://en.wikipedia.org/wiki/MultiMediaCard

Quote:
eMMC also does not support the SPI-bus protocol.

_________________
A backup a day keeps DR away.


Top
 Profile  
 
 Post subject: Re: SD/EMMC SPI MODE
PostPosted: November 6th, 2017, 21:34 
Offline

Joined: February 28th, 2011, 21:04
Posts: 178
Location: United Kingdom
Pretty sure my PC3k Flash Card adapter has this option.


Top
 Profile  
 
 Post subject: Re: SD/EMMC SPI MODE
PostPosted: November 7th, 2017, 0:41 
Offline
User avatar

Joined: December 4th, 2012, 1:35
Posts: 2965
Location: Adelaide, Australia
There are some resources out there such as
http://www.microchip.com/forums/m530149.aspx
http://nerdclub-uk.blogspot.com.au/2012/11/how-spi-works-with-sd-card.html
http://elm-chan.org/docs/mmc/mmc_e.html

what is it specifically you want to do?

If the SD card is failed and you think you might be able to go through a different interface, this is probably unlikely.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 4 posts ] 

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 3 guests


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 post attachments in this forum

Search for:
Jump to:  
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group