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Processing of a hardware interrupt in the process of Unlock Freescale MC908GT16 Eeprom Memory begins after completion of the current instruction. When the instruction is complete, the SIM checks all pending hardware interrupts. If interrupts are not masked (I-bit clear in the condition code register), and if the corresponding interrupt enable bit is set, the SIM proceeds with interrupt processing; otherwise, the next instruction is fetched and executed.

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If more than one interrupt is pending at the end of an instruction execution, the highest priority interrupt is serviced first. Below Figure demonstrates what happens when two interrupts are pending. If an interrupt is pending upon exit from the original interrupt service routine, the pending interrupt is serviced before the LDA instruction is executed to Crack Microcontroller MC68HC08AZ60 Eeprom Memory.

The LDA opcode is prefetched by both the INT1 and INT2 RTI instructions. However, in the case of the INT1 RTI prefetch, this is a redundant operation. To maintain compatibility with the M6805 Family, the H register is not pushed on the stack during interrupt entry when Reading MCU. If the interrupt service routine modifies the H register or uses the indexed addressing mode, software should save the H register and then restore it prior to exiting the routine.