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日立单片机HD404878解密技术研究

 HD404878解密等日立(HITACHI)单片机解密是深圳芯片解密研究所科技芯片解密事业部提供的优势解密项目之一,在日立IC芯片及单片机解密领域,我们的解密技术已经较为成熟,针对每一款芯片均经过多次反复实验与验证,并成功为一大批客户提供了高效可靠的IC解密服务。
    这里,我们将针对HD404878芯片的主要技术特征做简单介绍,供大家参考借鉴。
HD404878 Features
  46 I/O pins (HD404878 Series)
  Large-current I/O pins (source: 10 mA max.):4
  Large-current I/O pins (sink: 15 mA max.): 8
  LCD segment multiplexed pins:16
  Analog input multiplexed pins: 6
  Four Timer/counters
  8-bit timer: 2 (HD404878 Series)
  16-bit timer:1 (Can also be used as two 8-bit timer)
  8-bit input capture circuit (HD404878 Series)
  Two timer outputs (including PWM out-put)
  Two event counter inputs (edge-programmable) (HD404878 Series)
  Clock-synchronous 8-bit serial interface
  A/D converter
  LCD controller/driver (32 segments × 4 commons) (HD404878 Series)
  On-chip oscillators
  Main clock (ceramic resonator, crystal resonator, or external clock operation possible)
  Sub-clock (32.768 kHz crystal resonator)
  Interrupts
  External: 3 (including one edge-programmable)
  Internal: 5 (HD404878 Series)
  Subroutine stack up to 16 levels, including interrupts
  Four Low-power dissipation modes
  Module standby (timers, serial interface, A/D converter)
  System clock division software switching (1/4 or 1/32)
  Inputs for return from stop mode (wakeup): 4
  Instruction execution time
  Min. 0.89 μs (fOSC = 4.5 MHz)
  Operation voltage
  1.8 V to 5.5 V

   在单片机解密过程中,对单片机本身性能特征及其加密特性与内部结构有一定的了解,能够更好的理解单片机加解密原理,选择更合适的解密方案。以上HD404878单片机的主要性能特征介绍,供广大客户与工程师参考借鉴。欢迎有HD404878解密等HITACHI芯片解密需求者与深圳芯片解密研究所联系。
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