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

I've done (toggled the enable pin with a PWM signal) that with another type of display and it works just fine.  Since you don't need super high-speed PWM for brightness control you could do it in the ISR of an SX28.  As Robert points out, though, there was just one enable pin for the entire display and everything dimmed/brightened together.

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