Unformatted text preview: • Be familiar with any instructions associated with subroutines • Be able to explain the registers involved and the process by which the microprocessor leaves the main program and begins execution of the subroutine and how it gets back to the main program. Interrupts • Know the three things that must be done in the program in order for the microprocessor to recognize and service interrupts • Know what an interrupt is and how it differs from a subroutine • Be familiar with the information on the handout and how to use the EICRA, EICRB and EIMSK registers. • Know what INT0-INT7 are • Know what interrupt vectors are and how to set them up. • Know what the I flag is, how to set it and how to clear it. Know why you need to set it and why you might clear it. Understand HW #3, HW #4 and HW #5 and labs #3, #4 and #5...
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- Spring '07
- Telecommunications , Calculation, Telecommunications Engineering Technology