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PIC18F2320概况与IC解密成功

时间:2010-08-09 09:27:15

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。
Programming code memory is accomplished by first loading data into the appropriate write buffers and then
initiating a programming sequence. Each panel in the code memory space (see Figure 2-7 and Figure 2-8)
has an 8-byte deep write buffer that must be loaded prior to initiating a write sequence. The actual emory write sequence takes the contents of these buffers and programs the associated EEPROM code memory.
The programming duration is externally timed and is controlled by PGC. After a “Start Programming” com-
mand is issued (4-bit command, ‘1111’), a  NOP is issued, where the 4th PGC is held high for the duration of the programming time, P9 (see Figure 3-6). After PGC is brought low, the programming sequence
is terminated. PGC must be held low for the time specified by parameter P10 to allow high-voltage
discharge of the memory array.The code sequence to program a device is shown in Table 3-3. The flowchart shown in Figure 3-5 depicts the logic necessary to completely write a device.
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