Start Setup Mode
Set Time/date
Select Choice ?
Select Choice ?
Initialize RTC
Get date & time from RTC
User Mode
Enter item code
Edit/Enter Items
Enter new Item Detail
Enter new date/time
Selec Default tDisplay Of date & time
Enter a new item & its detail
Enter item Quantity
Edit an Item’s Detail
Get Data From EEPROM
Edit detail of items
Data Processing
Initialize EEPROM & Send data to ROM
Display total amount on LCD
Yes
Print bill with Date, time & Season Greeting
Get Date & Time from RTC
Print Bill?
No