In SX Microcontrollers, SX/B Compiler and SX-Key Tool, PJMonty wrote:

Peter (pjv),

Here's the relevant part of Bean's PDf file:

[quote=""]The required interrupt rate depends on the PWM output rate, the interrupt rate must be (Hertz *
Levels). So let's say you wanted to create an output with a 4KHz update rate using 8-bits. Eight bits is
256 levels, so the interrupt rate would have to be (4000 * 256) or 1,024,000. If you are running the SX
from it's internal clock at 4MHz you can see that there would be less than 4 cycles available per
interrupt. 4,000,000 / 1,024,0000 = 3.90625. It is clear that we would need to sacrifice either update
speed or resolution to be able to use an interrupt for generating this signal.[/quote]

Thanks,
PeterM

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