Flipperforum

wimpinball schreef:eproms wissen zichzelf wel .
het ultraviolet licht is voldoende om epros te wissen .
daarom is er ook een stikker op het venster
laat je print met epros maar eens een dag in je auto liggen in de zon .
gegarandeerd dat je eprom is gewist

wimpinball schreef:eproms wissen zichzelf wel .
het ultraviolet licht is voldoende om epros te wissen .
daarom is er ook een stikker op het venster
laat je print met epros maar eens een dag in je auto liggen in de zon .
gegarandeerd dat je eprom is gewist

Wikipedia schreef: Storing data in the memory requires selecting a given address and applying a higher voltage to the transistors. This creates an avalanche discharge of electrons, which have enough energy to pass through the insulating oxide layer and accumulate on the gate electrode. When the high voltage is removed, the electrons are trapped on the electrode.[3] Because of the high insulation value of the silicon oxide surrounding the gate, the stored charge cannot readily leak away and the data can be retained for decades.

The programming process is not electrically reversible. To erase the data stored in the array of transistors, ultraviolet light is directed onto the die. Photons of the UV light cause ionization within the silicon oxide, which allow the stored charge on the floating gate to dissipate. Since the whole memory array is exposed, all the memory is erased at the same time. The process takes several minutes for UV lamps of convenient sizes; sunlight would erase a chip in weeks, and indoor fluorescent lighting over several years.[4] Generally the EPROMs must be removed from equipment to be erased, since it's not usually practical to build in a UV lamp to erase parts in-circuit.