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by Scoundreller
693 days ago
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Flash storage requires high voltage to do an erase (which needs to precede a write operation). Back in the EPROM days, that was easy, just don’t supply 25V or whatever. Modern flash still needs those high voltages but generates it on-chip via charge pumps. If your read-only switch physically disconnected the charge pumps, you would have read-only flash. |
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