Microcontroller

1. (6 pts) What are three operation modes of HC12 microcontrollers? And for each mode, specify the sizes of external address and data buses What kind of circuit do you need in order to extract address signals from a CPU with multiplexed address and data signals? 3. Why should a bidirectional buffer be used when connecting a CPU to the data bus? 4. In the following circuit, there is an Optional Latch. Why is the Latch optional? In what situation it is essential and in what situation it is not necessary