>From my rudimentary experience in writing smartcard driver/hw for some atmel chips i found the usart must support iso7816 (half duplex so just one pin) and the need for a gpio pin for rst and/or power control for the card and a gpio for the card inserted switch on the carrier. I also experienced the need for a reasonable size capacitor to minimize the effects of inserting/removing cards on any shared 3-5V PS line on the rest of my circuitry. FWIW, I used ACOS3 cards that have a easy to find spec for r/w memory...but even simpler would be nice. -Rick
On Tue, Jul 19, 2016 at 1:35 AM, Jakob Schlyter <ja...@kirei.se> wrote: > In Berlin, we've been talking about how to use smart cards for > reading/writing m-of-n components independent of the management host. The > rough consensus was that plain memory smart cards as data carriers would be > easy to use and present a reasonable interface to the ARM. Alternatives > would be USB or punch cards, but seems to either add more attack surface or > require ancient hardware. > > In order to be able to experiment more with this, we need two additional > UARTs on the next hw rev board. One for connecting to a smart card reader > (the rest of the required stuff is apparently already in the ARM) and one > for a future LCD/keypad. As far as I understand, no other hardware (except > for the actual reader/LCD/keypad) should be needed, and I hope Peter Stuge > can confirm this. > > jakob > _______________________________________________ > Tech mailing list > Tech@cryptech.is > https://lists.cryptech.is/listinfo/tech >
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