??? 03/06/07 10:53 Read: times |
#134350 - Memory Cards - SD/MMC - Questions |
I am desgning a product requiring SD/MM interfacing.
I know this topic is already being discussed in the past but still many clarification remains Mr Scot D Dolanhas said in his following thread that he has developed interface for SD/MMC http://www.8052.com/forum/read.phtml?id=117035 Mr Erik Malund has given link to Silab USG Mass storage refe design. Some else has also given link to SANdisk SD/MMC product manual. All these has given me lot of help in these subject But Detailed SD/MMC card spec are given only in Sandisk Manual. This manual is a bit confusing in regards to SPI specification If Mr.Scot or somebody else has already done work on SD/MMC cards then they can clarify follwing point(pl ref pg 87,88 ,100, 101 & 113 of manual) (1) Can clock be stopped? what is requirment of minimum 8 clock cycles after command or data response packet. (2) It is a minimu 8 clock cycle so more no of clock cycle can also be given? then how SC/MMC card will know that these clock cycle are not for clocking in next instrcuction ? (3) Nac period (Read wait tiem after read command) should be clock running during this period ? |
Topic | Author | Date |
Memory Cards - SD/MMC - Questions | 01/01/70 00:00 | |
Which manual are you referring? | 01/01/70 00:00 | |
Nice response - | 01/01/70 00:00 | |
Same Sandisk Manual | 01/01/70 00:00 | |
Somewhat? OK, then try again | 01/01/70 00:00 | |
Please give link | 01/01/70 00:00 | |
Already shown in my previous post![]() | 01/01/70 00:00 |