Kiara has a washing machine and a refrigerator.
(a) She has an embedded system in her washing machine.
Describe what is meant by an embedded system, using the washing machine as an example.
(b) The washing machine's embedded system makes use of both Random Access Memory (RAM) and Read Only Memory (ROM).
State the purpose of RAM and ROM within the washing machine's embedded system.
(c) The temperature in her refrigerator must be kept between 4 and 6 degrees Celsius. The microprocessor in the refrigerator turns on the cooling if the temperature is too high, and turns off the cooling if the temperature is too low.
Explain why the system in the refrigerator is a control and not a monitoring system.
Tick (✓) one box in each row to identify the logic gate that each statement describes.
| Statement | AND | NAND | NOR | XOR | OR |
|---|---|---|---|---|---|
| The output is 1 only when both inputs are 1 | |||||
| The output is 1 only when both inputs are different | |||||
| The output is 1 only when both inputs are 0 |