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Microchip Computer PIC16F1459 Flash Memory Cloning can help engineer to recover Microcontroller PIC16F1459 firmware from its program memory and configuration memory, the status of MCU PIC16F1459 will be turned from locked to unlocked one;

In Program/Verify mode, the program memory and the configuration memory can be accessed and programmed in serial fashion. ICSPDAT and ICSPCLK are used for the data and the clock, respectively. All commands and data words are transmitted LSb first by unlocking microcontroller PIC16F73 program. Data changes on the rising edge of the ICSPCLK and latched on the falling edge. In Program/Verify mode both the ICSPDAT and ICSPCLK are Schmitt Trigger inputs.

The sequence that enters the device into Program/Verify mode places all other logic into the Reset state. Upon entering Program/Verify mode, all I/Os are automatically configured as high-impedance inputs and the address is cleared.

There are two different methods of entering Program/ Verify mode via high-voltage:

VPP – First entry mode

VDD – First entry mode

To enter Program/Verify mode via the VPP-first method the following sequence must be followed:
1. Hold ICSPCLK and ICSPDAT low. All other pins should be unpowered.
2. Raise the voltage on MCLR from 0V to VIHH.
3. Raise the voltage on VDD from 0V to the desired operating voltage.
The VPP-first entry prevents the device from executing code prior to entering Program/Verify mode. For example, the device will execute code when Configuration Word 1 has MCLR disabled (MCLRE = 0), the Power-up Timer is disabled (PWRTE = 0), the internal oscillator is selected (FOSC = 100), and ICSPCLK and ICSPDAT pins are driven by the user application for the purpose of MCU PIC16F886 software extraction. Since this may prevent entry, VPP-first Entry mode is strongly recommended.