Sujet : Re: Article on the 8088 bus cycle
De : david.schultz (at) *nospam* earthlink.net (David Schultz)
Groupes : comp.archDate : 15. May 2024, 23:35:58
Autres entêtes
Message-ID : <qZGcncEwuahTpdj7nZ2dnZfqnPjByJ2d@earthlink.com>
References : 1 2 3
User-Agent : Mozilla Thunderbird
On 5/15/24 3:30 PM, BGB wrote:
In my case, I hadn't found much information about accessing SDcards in anything other than SPI mode, but I guess if it turns out it is basically just QSPI and the same byte-oriented protocol as before, that would be useful to know.
The SD card specification covers both in detail.
But the 4 bit wide SD access will depend a lot on what hardware support you have. I used an ARM (in a Teensy 3.2) to do the job. Mostly quite similar to SPI access.
-- http://davesrocketworks.comDavid Schultz