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STC IC unlock also called MCU crack, STC chip decryption, STC IC decryption, but strictly speaking, these names are not scientific but has become a common term. We call CPLD decryption, DSP decryption MCU crack. MCU is only one of the classes that can load program chips. The chips that can program and encrypt are also DSP, CPLD, PLD, AVR, ARM and so on.
STC15 series MCU is a single clock/machine cycle (1T) MCU produced by STC. It is a new generation of 8051 MCU with high speed/high reliability/low power consumption/super anti-jamming. With the eighth generation encryption technology of STC, the rumor cannot decrypt. The instruction code is entirely compatible with the traditional 8051, but the speed is 8-12 times faster. Internal integration of high precision R/C clock, ISP programming 5MHz-35MHz wide range can set, can eliminate the external expensive crystal oscillator and external reset circuit (internal integrated high reliable reset circuit, ISP programming eight reset threshold voltage is optional). Three CCP/PWM/PCA, eight high-speed 10-bit A/D conversion (300,000 times per second), built-in 2K byte large-capacity SRAM. Two sets of ultra-high speed asynchronous serial communication ports (UART1/UART2) can switch between five sets of pins; time-sharing multiplexing can use as five sets of serial ports, one game of high-speed synchronous serial communication ports SPI, for multi-serial communication/motor control/big interference occasions.
STC15 series MCU uses STC-Y5 ultra-high speed CPU core. At the same clock frequency, the speed of STC15 series MCU is 20% faster than that of early STC series MCU (such as STC12/STC11/STC10 series).
STC MCU is a series of microcontrollers with 51 core. STC microcontroller is designed by Shengquan Science and Technology. It is manufactured by Hongjing Company in China. When creating this chip, it learns the lesson that 51 series of microcontrollers can be easily decrypted and improves the encryption mechanism. STC microcontroller has been wholly encrypted when it leaves the factory. User program is written by ISP/IAP mechanism. When programming, it is written while checking, and can not read commands. This increases the difficulty of decryption. Now STC89 series microcontrollers from all manufacturers in the world have been decrypted. The widely used microcontrollers are STC12/11/STC1__0xX series chips designed by the sixth generation encryption technology or STC90C51 series, which are fully compatible with hardware and software. STC12/11/STC1_ 0xX series is a 1T 8051, which adds many new features. Such as I/O port driving ability is stronger, not natural to break down, P0 port has pull-up. All ports have four modes; watchdog is more reliable, internal reset is high and stable, it can ultimately save external reset, high speed, low power consumption, internal clock, and external clock when the clock precision requirement is not high, it can save external clock. 。 STC15 series adopts the eighth generation encryption technology, which has the characteristics of high speed, high reliability, full voltage, low power consumption, super anti-interference, and super-encryption. Nobody in the industry can crack it now. STC microcontroller decryption technology common STC microcontroller decryption methods have three kinds: 1. Soft decryption technology is to find out the design defects of the microcontroller through software and read out the internal OTP/flash ROM or EEPROM code, but this method is not the best, because the research time is too long. 2. Ultraviolet light technology is a very popular method, and also the simplest one. It takes only 30 to 120 minutes to produce documents, and the cost is very low. First, the Config. (configuration file) Of MCU is saved by the burner, then the package is removed by melting nitric acid. Under the microscope, the OTP/flash ROM or EEPROM cover with opaque objects. Ultraviolet light irradiates the cryptographic bit for 10 to 120 minutes, and the cryptographic bit is changed from 0 to 1, so the program can be read out by programmer. (However, it has a flaw, not for every OTP / false.) 3. Probe technology, and FIB technology for decryption, is a prevalent method, but at a specific cost. Firstly, the Config. (configuration file) Of MCU is saved by the burner, which is used to make up the files manually. Then the package was melted off with nitric acid and tested with a microprobe under a microscope. After the results are obtained, the pictures taken under the microscope are connected or cut by FIB. There are also programs that can be read out by programmers without FIB using probes.