Copy Microcontroller PIC12F683 Program and data from its flash and eeprom memory separately after crack MCU and disable the security fuse bit embedded inside the memory;
The peripheral interrupt flags are contained in the Special Function Registers, PIR1 and PIR2. The corresponding interrupt enable bits are contained in Special Function Registers, PIE1 and PIE2, and the peripheral interrupt enable bit is contained in Special Function Register when extract ic at89s51 firmware.
When an interrupt is responded to, the GIE bit is cleared to disable any further interrupt, the return address is pushed onto the stack and the PC is loaded with 0004h.
Once in the Interrupt Service Routine, the source(s) of the interrupt can be determined by polling the interrupt flag bits. The interrupt flag bit(s) must be cleared in software before re-enabling interrupts to avoid recursive interrupts before extract microcontroller at89c55wd eeprom.
For external interrupt events, such as the INT pin or PORTB change interrupt, the interrupt latency will be three or four instruction cycles.
The exact latency depends when the interrupt event occurs, relative to the current Q cycle. The latency is the same for one or two-cycle instructions. Individual interrupt flag bits are set, regardless of the status of their corresponding mask bit, PEIE bit, or the GIE bit when copy microcontroller program.
External interrupt on the RB0/INT pin is edge triggered, either rising, if bit INTEDG (OPTION_REG<6>) is set, or falling, if the INTEDG bit is clear.
When a valid edge appears on the RB0/INT pin, flag bit INTF (INTCON<1>) is set. This interrupt can be disabled by clearing enable bit INTE (INTCON<4>) before copy microcontroller program.
Flag bit INTF must be cleared in software in the Interrupt Service Routine before re-enabling this interrupt. The INT interrupt can wake-up the processor from SLEEP, if bit INTE was set prior to going into SLEEP after copy microcontroller program.
The status of global interrupt enable bit GIE decides whether or not the processor branches to the interrupt vector following wake up. See Section 12.14 for details on SLEEP mode when copy microcontroller program.
An overflow (FFh → 00h) in the TMR0 register will set flag bit TMR0IF (INTCON<2>). The interrupt can be enabled/disabled by setting/clearing enable bit TMR0IE (INTCON<5>).
