PCA24S08A 1024 × 8-bit CMOS EEPROM with access protection Rev. After manufacturing, all EEPROM bits will be set to a value of ‘1’. Writes to the EEPROM take less than 5 ms to complete. I guess it was write protected in the writing process. The EEPROM memory offers an endurance of 100,000 write cycles per byte, with 10 year data retention. Maintaining this configuration information prevents the loss of communications after the program is transferred.Īpply this protection via the Channel Communication Configuration dialog box General tab. The 25CSM04 features a configurable write protection scheme which allows the user to select Legacy Write Protection mode or Enhanced Write Protection mode.
#Eeprom is write protected software#
These controllers only provide a capability that allows you to select whether or not the communications configuration in the controller should be maintained when a program from a memory module is transferred to the controller. The user-programmable section of the Security register can later be permanently write-protected via a software sequence. Once a memory module is programmed with write protection, you can no longer write to it using an SLC 5/03, SLC 5/04, or 5/05 processor.Īpply this protection via the Memory Module Protection dialog box that appears when you attempt to perform EEPROM after selecting Comms > EEPROM.Ĭlick the Normal Protection Control button if you want to reuse the EEPROM Memory module.Ĭlick the Write Only Protection Control button if you want to retain the program in EEPROM and do not want the EEPROM device reprogrammed at any time. This option is similar to UVPROM functionality. Memory module write protection allows you to permanently program the memory module.