Hello, as a user,
Is your IC protected for write? Look in the IC Config Information at bottom of Xgecu window ( just guessing ). If not post an image of any error.
Just trying to help!
Why some cheap programmers can do it ??
https://www.diagprog4.com/codiprog-usb (FAST Erase all M35080 EEPROMs (in about 10 seconds)
https://www.chinaobd2.com/wholesale/m35080v6-eeprom-eraser-programmer-120.html (Erase time to Delivery State for M35080V6 1-10 minutes)
R270 : https://fr.aliexpress.com/item/32869848643.html
This is a function that does not disclose by a chip manufacturer. Maybe they got the erasure algorithm through a special method.Some dedicated programmers have some dedicated functions, which is normal.