— 11 —
[Data reading procedure]
When the CPU reads the data of EEPROM, CPU sends the CS signal and SK signal to EEPROM.
Then, CPU sends the address to EEPROM, and then EEPROM sends the data to CPU.
[Data writing procedure]
When the CPU saves the data to EEPROM, CPU sends the CS and SK signal to EEPROM.
And CPU sends the address and data to EEPROM from pin No.15.
When the EEPROM writes the data , EEPROM outputs the busy signal from DO terminal to CPU.
After finish writing, EEPROM outputs the ready signal from DO terminal to CPU.
CS
SK
DI
DO
Address
Data
Output data here
CS
SK
DI
DO
Address
Data
High Impedance
BUSY(L)
READY(H)
Status
