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ECET 330 Homework 7
1.Is it possible to interface an IC with a different technology such as TTL to HCS12 ports? What are the conditions in terms of electrical parameters that need to be satisfied for this purpose?
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2.Given an LED with a forward drop of 1.5V and an operating current of 10 mA, design the interface to the HCS12 showing your calculations.
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3.Bit 4 of Port B is connected to a switch that normally outputs a zero. Monitor this switch to detect a change from zero to one. Immediately when it becomes one, call a function to toggle Bit 5 of Port B,