Interrupt Vector

• For each interrupt, which interrupt function to call

• In low program addresses

  • Hardware generates an LCALL to address in interrupt vector
  • Pushes PC (but nothing else) onto the stack
  • RETI instruction to return from interrupt

0x00 - Reset PC address

0: 0x03 - External interrupt 0

1: 0x0B - Timer 0

2: 0x13 - External interrupt 1

3: 0x1B - Timer 1

4: 0x23 - Serial line interrupt

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