[sdiy] Rotary Switch -> illuminated PB w/ multicolor LED?

Ingo Debus igg.debus at gmail.com
Thu Feb 17 16:11:02 CET 2022

> Am 16.02.2022 um 21:00 schrieb Jay Schwichtenberg via Synth-diy <synth-diy at synth-diy.org>:
> there were 2 times I wore out the program flash in uCs. These were NXP chips and they were probably programmed 10-20 times over 9-12 months.

The flash wore out after only 20 rewrites? I think there must have something else gone wrong. I just dug out an old NXP (still Philips, actually) data sheet that says "More than 100,000 minimum erase/program cycles for each byte“. I’ve seen other data sheets that say 1000 rewrites (from Microchip IIRC), but still…

I once managed to wear out a flash memory, this was due to sloppy programming. This was a (hand-operated) testing device, and instead of writing the flash once after each test it wrote 120 times (there were 120 values per test to be saved, and the write was inside a loop). After a few years the flash was indeed gone.

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