Do not connect the signal pin of HPT604 directly to PA0, because its output voltage will exceed 3.3V, so a series resistor is required for voltage division, otherwise the I/O port will be damaged.
The signal pin of HPT604 should not be connected directly to PA0 because it outputs more than 3.3V, so a series resistor is required for the split voltage, otherwise it will damage the I/O port.
The signal pin of hpt604 should not be directly connected to PA0, because its output voltage will exceed 3.3V, so series resistance is needed to divide voltage, otherwise I / O port will be damaged<br>