at 0103H, as shown in the figure below:
When the PWM5 interrupt occurs, the hardware will jump to the 0103H address automatically to execute "LJMP
006BH", and then execute "LJMP PWM5_ISR" at 006BH to jump to the real interrupt service routine, as shown in the
figure below:
After the execution of the interrupt service routine is completed, it returns through the RETI instruction. The entire
interrupt response process just executed an additional LJMP statement.
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