On 20 May 2010 05:47, David Given <dg@...> wrote:
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On 19/05/10 19:53, Janusz Krzysztofik wrote: [...]
I'm not sure what smart card interface could we use for if ever supported. Removable storage perhaps?
That's an intriguing idea. ISO7816-3 says:
http://www.cardwerk.com/smartcards/smartcard_standard_ISO7816-3.aspx
...that the clock rate defaults to 9600 b/s. OTOH, depending on how you read the excruciating spec, it may be possible to increase it to either 54 kb/s or 860 kb/s, which correspond to 5 kB/s and 90 kB/s after framing. About twice floppy disk speed...
Does the E3's smartcard reader support this? Is it flexible enough to support any of the weirder smartcard protocols which use the two aux pads to turn the whole thing into an MMC or USB device?
I think the E3 card reader is just done in software - bitbang on a couple of GPIO pins. So I think it should be possible to use if for SPI/MMC. I think USB is less likely
Matt