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PIC18F2420单片机解密与介绍

时间:2010-08-11 08:45:07

由于芯片的应用不同在不同的设备中,即使是同一型号,在解密费用上也会存在很大差别,特别是有些设备上用的是专用芯片,解密难度特别大,因此解密费用会比普通芯片解密高几十倍。
世纪芯在IC解密/单片机解密/芯片解密技术研究领域中取得了丰硕的科研成果,可以针对各类疑难IC芯片提供高可靠性的解密方案。在业界中以其专业的服务赢得了良好的口碑。
In PIC18 Flash devices, the Configuration Words arelocated starting at address 300000h. This address
resides beyond the space of regular user programmemory (see Figure 8 for an example).
In PIC18FXXJ Flash devices, the Configuration Wordsare located at the very end of the user memory space
(see Figure 9). These values are copied on any Resetfrom the program memory location into the
Configuration registers. Once this copy is complete, thewrite mechanism to the Configuration registers is
disabled.
If any of the Configuration bits are changed in theprogram memory during user operation, they will not
have an effect until the device goes through a Reset.
After a device Reset, the Configuration Words will becopied back into the Configuration registers.
 

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