For the HT46F4xE, Flash Type MCU with EEPROM device, are there any special points to note when using?
Answer The following points should be noted for the EEPROM in the HT46F4xE: 1. The two SCL and SDA lines are not used for read/write control. The EEPROM control register EECR is used for this function. 2. The EEPROM data cannot be directly accessed by other ICs, only the HT46F4xE can be used for direct access. The reason is because the EEPROM has no external communication port. 3. Using indirect addressing the EEPROM signals CS, SK, DI and DO are controlled using the EECR register in Bank 1 using software to implement read and write data functions to the EEPROM 4. EEPROM operations are executed using the seven READ, ERASE, WRITE, EWEN, EWDS, ERAL and WRAL instructions. For more information on the protocol for these instructions and on the EEPROM, the HT46F4xE datasheet should be consulted..
