Freescale Semiconductor MC68HC908GT8CFB (Factory Trim) QFP(44) Device

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Adapters for Engineering Programmers

Last Updated: 05/18/2023

IMPORTANT: Microcontroller with FLASH.The following describes the buffer setup:The addresses $E000 to $FDFF are FLASH .The address $FF7E is FLASH Block Protect Register.The addresses $FFDC to $FFFF are Flash Vectors.This device has an eight bytes security feature from $FFF6 to $FFFD. To read aprogrammed device with the security feature the buffer or Device Configure mustbe filled with correct data from address $FFF6 to $FFFD. Incorrect data at theselocations will prevent access to the device.*** During Erase factory programmed trim value at addresses $FF80 and $FF81 will be saved first and restoredat the end. Erase operation uses the Erase Passwords in Device Configure to read the factory trimvalue. Erase will fail if the Erase Passwords do not match the device. A blank devicecan use all $FF’s for the Erase Passwords.ID Check actually reads the factory trim value.The ID Check cannot be disabled.During Verify the factory trim value is read back and verified against the stored value during ID Check.The Verify after programming’ must not be disabled. ‘