Hi friends, i want to save only 1 byte data into the EEPROM on SST 89E516RD. Refer to the datasheet, when the voltage drop to 3.8V on VDD pin, the MCU could generate a interrupt to execute the program at location 004BH(interrupt 9 in Keil), but I faild.
I executed the same program for saving by external interrupt 0, it do can save the data. And I have set the EBO bit in by IEA = 8.
And i use one 4700uF capacitor to store the engergy for MCU saving the data, and checked that the discharging curve from 4.3V to 2.7V is about 400ms long.
I am really puzzled on the BOD function, can it save data in deed?
Anyhow, at last thank you for reading my question.