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标题: IC卡时钟实测数值 [打印本页]

作者: liyf 时间: 2014-10-5 14:08
标题: IC卡时钟实测数值
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 <= 50us  Clock High
50us <= t12 ........ Reset High    10us <= t16 <= 100us Clock Low
t13  <= 10us  Propagation delay    t17 <= 10us  Propagation delay

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