IC卡时钟实测数值

liyf 发表于 2014-10-5 14:08:10

IC卡时钟实测数值

IC卡时钟实测数值
   ______________________________________________________________________
VCC__/

   _____________________________________________________________________
VPP___/
            t12
      :<---------------->:
      :__________________:
RST_____/:                \_______________________________________________
      :                :
      :t10       t11 :       t15    t16
      :<---->:    :<---->:t14 :<---->: :<---->:
            : ____ :    :<---->: :______: :    : _______
CLK_____________:/1 :______:______:/ 2 :______:/ 3 \_______
                           :             :
                           : t13          :t17
                           :<---->:       :<---->:
   _____________________________ :______________ :______________ ___
I/O___//////////////////////////////:_______1______X-X_______2_______X-X___

5us<= t10                      10us <= t14 <= 100us Clock low after RST
5us<= t11                      10us <= t15 <= 50usClock High
50us <= t12 ........ Reset High    10us <= t16 <= 100us Clock Low
t13<= 10usPropagation delay    t17 <= 10usPropagation delay

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