5-4
Using an EEPROM or EPROM
TI545/TI555 System Manual
Introduction (continued)
After your EPROM has been programmed, it is portable and can be used
in any other TI545–1102 or TI555 CPU of compatible or newer software
revision. EPROMS are available from your distributor for EPROM
applications.
You can manage operation of EEPROMs by using AUX Function 84 on your
programming unit. If necessary, refer to your SIMATIC TI505 Programming
Reference manual for detailed instructions about executing AUX Functions.
AUX Function 84 allows you to do the following procedures:
•
Copy RAM to EEPROM.
•
Copy EEPROM to RAM.
•
Select RAM as program source.
•
Select EEPROM as program source.
•
Erase the program in EEPROM.
•
Report source (RAM OR EEPROM) of program being executed.
NOTE:
The EEPROM is automatically write protected on power up, which
helps to prevent any accidental write operations.
EEPROM Functions