547CHAPTER 26μPD78P058F, 78P058FY26.4 Screening of One-Time PROM VersionsOne-time PROM versions cannot be fully tested by NEC before shipment due to the structure of one-time PROM.Therefore, after users have written data into the PROM, screening should be implemented by user: that is, storedevices at high temperature for one day as specified below, and verify their contents after the devices have returnedto room temperature.Storage Temperature Storage Time125°C 24 hours
