4.1 Operation with Various Supply Voltages
The allowable operating voltage of the microcontroller should be considered in determining the low-level threshold that needs to be set. For instance, the PIC18-Q10 microcontrollers can operate up to 1.8V so all the voltage thresholds mentioned in Table 4-1 can be used. Some 8-bit PIC microcontrollers can operate up to 2.3V while others can operate up to 2V.
Note: The maximum allowed clock speed is a
function of the supply voltage. The LF versions of the PIC microcontrollers can operate
down to 2V at a maximum clock speed of 4 MHz.
Refer to the device data sheet to confirm the operating voltage range and maximum clock speed with respect to the operating voltage.