Unique ID for HC(S)12(S) -- MC9S12XDP512?

[Pang]

Hi every one,

Does each processor have an unique ID? If it does, where and how to get it?

Thanks,

Pang

[Nabla69]

Hello,

MCU ID Table is in the datasheet at the description of the MCU ID Register.

A.

[Pang]

Is that device id "unique"  in the register? It appears that it is all the same device id for MC912XDP512.(0xC411/0xC410).  I want to learn about the individual and unique id for each processor so that I can do something for Copyright Protection.

Thanks a lot for your inputs.

Pang

[Nabla69]

Ok, I understand what you want to do now.

There is no hard coded serial number available on the S12(X).
However, you can program one in Flash making it different each time.
Some programming tool allow this (Serialize).
If you secure the Flash, nobody will be able to retrieve this code to put it in another device.

A.

[Pang]

Got it. I am new to the world of S12X. How to secure it? Could u plz give me some leads to this method (book or papers)

Thanks,

Pang

[Nabla69]

No problem Pang,

There is a Flash location to write to in order to lock the Flash from external reading.

Two bits are securing the Flash and they are called SEC1 and SEC0.

These bits are located at 0xFF0F (CPU logical map) = 0x7F_FF0F'G ('G means global memory map).

The procedure is explained in Chapter 30.1.3 of the MC9S12XDP512 Datasheet.

An other solution is to include in your S-Record (the file you program in the MCU) these two bits, so it is all done in one operation. As you are not familiar with the family, I suggest you use the procedure from the datasheet. (the debugger has an option to secure the MCU also)

Alphonso.

[Pang]

Alphonso, Thanks a lot for your help. Pang

[StephenRussell]

Pang,

Try reading Freescale application note AN2400/d available at:

http://www.freescale.com/files/microcontrollers/doc/app_note/AN2400.pdf?fsrch=1

It tells you almost everything you need to know about flash and EEPROM programming in one place.