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

You can think of single pin PWM as modulating a single bit DAC. The article just shows how do implement a 3-bit DAC.

Instead of dividing my 7 (instead of 8) another method of implementation is to have a second LSB bit (so a forth pin with a 4K resistor). In this method, after setting the 3-bit DAC with (Value / 32)This "second LSB" pin is then the only pin toggled just like standard single pin PWM (with value // 32) . Of course this requires 1 more pin and another resistor.

Bean.

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