Using the PIC16F72 for control has the following limitations:
• MIPS: Generating a software PWM takes significant processing power. This limits any other application that may be required to run on the same MCU.
• PWM Frequency Range: The PWM frequency range is limited and requires firmware changes. The safe PWM frequency range is from 6 kHz to 10 kHz with an operating frequency of 20 MHz. The PWM cycle may have an error up to ±5%. The resolution is also limited between 6 to 8 bits. In addition to this, generating PWM outputs in firmware uses the on-chip Timer, program and data memory.
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