SIM card related Projects » SIMtrace 2

On Tue, Aug 28, 2018 at 12:43:15PM +0000, tsaitgaist [REDMINE] wrote:

I would even got further, we should have 4 smart card slots, one for each factor (0FF-4FF/full-nano). this would avoid having to use adapters.
having 3FF and 4FF is probably not a must since the 2FF slot can also hold them, but I think the 0FF (normal credit card size) would be quite beneficial for all who would like to debug normal/other smart cards (in full size).

I think those are two different requirements

a) multiple slots in which cards are inserted in parallel, and where you can select whihc SIM
shall be connected at any given time. I think that was what the original requestor had in mind.

b) multiple slots of which only one can be used (card inserted) at any given point in time,
which are simply all connected in parallel in order to avoid the neeed for any SIM card
size adapters. This sounds more like what you are hinting.

The option "b" is of course very easy to implement, if PCB space exists. The risk is
very low, basically just the additional stubs created on CLK and I/O lines. No need
for any multiplexers etc.