How much external memory do the 5000 Series chips require? How much EEPROM and how much flash?
5000 Series chips support up to 64KB of external non-volatile memory. Exactly how much memory is needed depends on the size of the device’s application code and non-volatile data. This memory can be provided by a single EEPROM device or by a combination of EEPROM and flash. However, a 5000 Series chip needs at least 2KB of EEPROM for all applications.