Copy Microcontroller PIC16F628A Firmware needs to decapsulate the MCU PIC16F628A and able to get access to the databus of MCU through which will be extract IC code out from its memory which is call reverse engineering microcontroller;
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.
Pin RA4 is multiplexed with the Timer0 module clock input to become the RA4/T0CKI pin. The RA4/T0CKI pin is a Schmitt Trigger input and an open drain output if Copy Microcontroller atmega1280p eeprom.
All other PORTA pins have TTL input levels and full CMOS output drivers. Other PORTA pins are multiplexed with analog inputs and analog VREF input.
The operation of each pin is selected by clearing/setting the control bits in the ADCON1 register (A/D Control Register1). On a Power-on Reset, these pins are configured as analog inputs and read as ‘0’.
The TRISA register controls the direction of the RA pins, even when they are being used as analog inputs. The user must ensure the bits in the TRISA register are maintained set, when using them as analog inputs when Copy ic atmega1280a bin.
PORTB is an 8-bit wide, bi-directional port. The corresponding data direction register is TRISB. Setting a TRISB bit (= ‘1’) will make the corresponding PORTB pin an input (i.e., put the corresponding output driver in a Hi-Impedance mode).
Clearing a TRISB bit (= ‘0’) will make the corresponding PORTB pin an output (i.e., put the contents of the output latch on the selected pin).
Each of the PORTB pins has a weak internal pull-up. A single control bit can turn on all the pull-ups. This is performed by clearing bit RBPU (OPTION_REG<7>) before Copy Microcontroller atmega48p flash.
The weak pull-up is automatically turned off when the port pin is configured as an output. The pull-ups are disabled on a Power-on Reset.
