Final answer:
CPUs can understand only two voltage levels on each input pin, not a range, which is why the statement is false. They recognize a specific high and low voltage level, and any voltages that fall in between could lead to erratic behavior or damage.
Step-by-step explanation:
The statement that CPUs can understand a range of input voltage signals on each input pin is false. CPUs are digital devices that recognize only two levels of input voltages: a high (typically representing a binary '1') and a low (representing a binary '0'). The exact voltage range that signifies a high or low signal depends on the specific CPU and its design, but it does not vary within that system. For instance, in TTL logic, a voltage close to 5V is recognized as a high, while a voltage near 0V is recognized as a low. However, there is a small range of voltages that are considered indeterminate and are therefore not valid logic levels. If a CPU were to receive signals within this indeterminate range, it could lead to erratic behavior or damage to the CPU.