What is the checksum of a blank EPROM or EEPROM device?

Description

The checksum of blank EPROM devices (e.g., configuration and Classic devices) is zero.

For EEPROM devices, the checksum represents the number of user-programmable cells used in the last design programmed into the device. Altera EEPROM devices are always erased before programming. Therefore, it is unnecessary to detect whether an EEPROM device is blank before programming.