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龙芯世纪芯片破解技术—R5F64561KFD解密

来源:芯片解密-龙芯世纪   时间:2011-03-14   阅读:920

 龙芯世纪科技芯片解密事业部依靠多年来在IC解密、MCU单片机解密、DSP芯片解密、CPLD芯片解密、FPGA芯片解密等技术研究中的经验积累和项目研究成果,致力于为客户需解密的每一颗芯片提供最具可靠性和经济效益的解密服务。

    近期以来,龙芯世纪专业的芯片解密技术攻关团队又在瑞萨R5F系列单片机解密领域取得突破,经过多次反复实验和实际解密过程的验证,我们目前可以为客户提供R5F系列单片机高效可靠的解密方案。
  这里我们提供对R5F系列R5F64561KFD单片机的基本性能特征介绍,供客户及工程师参考借鉴,因为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。(芯片解密请关注http://www.icinf.com/
    R5F64561KFD芯片介绍:
  Watchdog Timer Reset
  Where the PM12 bit in the PM1 register is “1” (reset when watchdog timer underflows), the microcomputer initializes its pins, CPU and SFR if the watchdog timer underflows. Then the program is executed
  starting from the address indicated by the reset vector.
  At watchdog timer reset, some SFR’s are not initialized. Refer to “SFR”. Also, since the PM01 to PM00 bits in the PM0 register are not initialized, the processor mode remains unchanged.
  Oscillation Stop Detection Reset
  Where the CM27 bit in the CM2 register is “0” (reset at oscillation stop detection), the microcomputer initializes its pins, CPU and SFR, coming to a halt if it detects main clock oscillation circuit stop. Refer to the section “oscillation stop, re-oscillation detection function”.
  At oscillation stop detection reset, some SFR’s are not initialized. Refer to the section “SFR”. Also, since the PM01 to PM00 bits in the PM0 register are not initialized, the processor mode remains unchanged.
  Normal Operation Mode
  Normal operation mode is further classified into three modes.
  In normal operation mode, because the CPU clock and the peripheral function clocks both are on, the CPU and the peripheral functions are operating. Power control is exercised by controlling the CPU clock frequency. The higher the CPU clock frequency, the greater the processing capability. The lower the CPU clock frequency, the smaller the power consumption in the chip. If the unnecessary oscillator circuits are turned off, the power consumption is further reduced.
  Before the clock sources for the CPU clock can be switched over, the new clock source to which switched must be oscillating stably. If the new clock source is the main clock, allow a sufficient wait time in a program until it becomes oscillating stably.
  Where the CPU clock source is changed from the On-chip Oscillator to the main clock, change the operation mode to the medium speed mode (divided by 8 mode) after the clock was divided by 8 (the CM06 bit of CM0 register was set to “1”) in the On-chip Oscillator mode.
    有R5F64561KFD解密需求者请直接与芯谷科技联系咨询更多解密详情。

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