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pimoroni / picovision

MIT License
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Reduce maximum RAM overclock #67

Closed MichaelBell closed 1 year ago

MichaelBell commented 1 year ago

In 800x480 mode the PSRAM was being overclocked to 147.6MHz. This didn't work on one of @technolhodgy 's boards (unsurprisingly, really).

Looks like this wasn't really necessary as there's only a minor degradation in total sprites we can support in that mode reducing the clock rate to 98.4MHz (using the also out of spec, but seemingly more reliable 66%/33% clock duty cycle to get a divide by 3 on the RP2040 system clock).

This PR is on top of the ADC and scroll offset fix because of the pico-stick.h blob.

technolhodgy commented 1 year ago

I attached a chunky 40mm fan and it only worked for half a second before the red screen. :rofl: