3 ms·
Airbag control modules do constantly write data. The last 5 seconds or so of sensor and input data is recorded for crash investigations.
by t34543 7y ago
Airbag control modules do constantly write data. The last 5 seconds or so of sensor and input data is recorded for crash investigations.
- cat199 7y agois this actually written to flash? concievably a big capacitor or watch battery could keep a 4 or 8k RAM going for quite a long time.
- beerandt 7y agoIt's got to survive a wreck, so I suspect power reliant memory is out.
- xfitm3 7y agoIf you look at airbag module teardowns there is a giant capacitor, but this is used to fire airbags in the event the vehicle's power system is rendered inoperable prior to deployment.
- leoedin 7y agoFlash isn't the only game in town. I wouldn't be surprised if airbags use FRAM - capable of more than 1 trillion write cycles
- cat199 7y agothanks - learning things :)