Hi there,
I have two question about clock rate for smart card:
1, Is there any rule of F and D to ensure the rtu is integer cycles of
input clock to card?
  etu = F / ( D * f ),  if arbitrary selected, say F=512, D=12, then
etu is not integer count of clock cycles.

2, Should F and D be reser to default value before warm reset?
  The default values are used in cold reset, but for warm reset, the
7816 standard seems not explitcit.

Any comment is appreciated.
Thanks.
Wayne
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