- 7 -
[Data reading procedure]
When the CPU read the dara of EEPROM, CPU send the CS signal and SK signal to EEPROM.
Then, CPU send the address to EEPROM, and then EEPROM send the data to CPU.
[Data writing procedure]
When the CPU save the data to EEPROM, CPU sends the CS and SK signal to EEPROM.
And CPU send 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
Summary of Contents for 110CR
Page 18: ...16 9 IC DATA 9 1 LB1268 9 2 S 80728AN Z 1 4 8 5 Equivalent circuit...
Page 19: ......
Page 20: ......
Page 21: ......
Page 22: ......
Page 23: ......
Page 24: ......
Page 25: ......
Page 26: ......
Page 27: ......
Page 28: ......
Page 29: ......
Page 30: ...11 PCB PAYOUT...
Page 31: ...29...
Page 32: ...30...
Page 37: ...35 4 KEYBOARD BLOCK 14 15 31 16 17 19 20 28 22 18 21 23 25 29 26 27 24 34 32 30 33...
Page 41: ...39 7 PRINTER UNIT...
Page 51: ......