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CY2048WAF单片机功能与分析

时间:2011-05-10 10:46:19

单片机解密过程中,对芯片内部结构及其加解密特征进行技术分析是解密工程师的一项必修课,因为只有充分理解单片机内部结构原理等技术信息,工程师才能准确进行方案开发,确定最可靠、成功率最高的芯片解密方案,最大限度确保解密项目的安全可靠。
Features
·Flash-programmable capacitor tuning array for low ppm initial frequency clock output
·Low clock output jitter
— 4 ps typ. RMS period jitter
— ±30 ps typ. peak-to-peak period jitter
·Flash-programmable dividers
·Two-pin programming interface
·On-chip oscillator runs from 10–48-MHz crystal
·Five selectable post-divide options, using reference oscillator output
·Programmable asynchronous or synchronous OE and PWR_DWN modes
·2.7V to 3.6V operation
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·Controlled rise and fall times and output slew rate Benefits
·Enables fine-tuning of output clock frequency by
adjusting CLoad of the crystal
·Allows multiple programming opportunities to correct errors, and control excess inventory
·Enables programming of output frequency after packaging
·PPM clock output error can be adjusted in package
·Provides flexibility in output configurations and testing
·Enables low-power operation or output enable function
·Provides flexibility for system applications through selectable instantaneous or synchronous change in outputs
·Enables encapsulation in small-size, surface-mount packages

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