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ECET 340 WEEK 3 HOMEWORK 3
1.1.Sketch a circuit that can be used to debounce a pushbutton and explain how it works.(4 points max)
2.2.In Figure 7.32 on page 339 of the Huang textbook, if the rowhas and the columnsare , which key is pressed? (2 points max)
3.3.In Figure 7.32 on page 339 of the Huang textbook, explain why the 10k? resistors ties to VCC are required.(2 points max)
4.4.Write down the lines of C code (interrupt service routine, ISR) that generates an interrupt when Port H pin 0 becomes a logic “1”.Within this ISR, disable interrupts, clear the interrupt flag, then enable interrupts, and return from routine. I also want the routine or lines of C code that initialize Port H pin 0 to be used as an interrupt (hint: think data direction register) (2 points max)