Extract IC PIC16LF877A Code from its flash and eeprom memory, the MCU PIC16LF877A security fuse bit will be located by microscope and then cut off by focus ion beam system by MCU Crack technique;
A program memory location may be read by writing two bytes of the address to the PMADR and PMADRH registers and then setting control bit RD (PMCON1<0>). Once the read control bit is set, the microcontroller will use the next two instruction cycles to read the data. The data is available in the PMDATA and PMDATH registers after the second NOP instruction if extract mcu at89lv51 bin.
Therefore, it can be read as two bytes in the following instructions. The PMDATA and PMDATH registers will hold this value until the next read operation.
FLASH program memory has its own code protect mechanism. External Read and Write operations by programmers are disabled if this mechanism is enabled. The microcontroller can read and execute instructions out of the internal FLASH program memory, regardless of the state of the code protect configuration bits.
Some pins for these I/O ports are multiplexed with an alternate function for the peripheral features on the device. In general, when a peripheral is enabled, that pin may not be used as a general purpose I/O pin.
Additional information on I/O ports may be found in the PICmicro™ PORTA is a 6-bit wide, bi-directional port. The corresponding data direction register is TRISA. Setting a TRISA bit (= ‘1’) will make the corresponding PORTA pin an input (i.e., put the corresponding output driver in a Hi-Impedance mode) if extract microcontroller at89c1051 code.
Clearing a TRISA bit (= ‘0’) will make the corresponding PORTA pin an output (i.e., put the contents of the output latch on the selected pin). Reading the PORTA register reads the status of the pins, whereas writing to it will write to the port latch.
All write operations are read-modify-write operations. Therefore, a write to a port implies that the port pins are read, the value is modified and then written to the port data latch.
