Read from Dallas DS5000T–32–16+

Hi !

Is there any way to copy the contents of this microcontroller?

Thanks in advance


Part Number: DS5000T–32–16+
RAM size: 32K bytes
MAx Crystal Speed: 16 MHz
TimeKeeping: Yes


8-Bit 8051-Compatible Microcontroller
Adapts to Task at Hand
8 or 32 kbytes of Nonvolatile RAM for
Program and/or Data Memory Storage
Initial Downloading of Software in End
System via On-Chip Serial Port
Capable of Modifying Its Own Program
and/or Data Memory in End Use

Crashproof Operation
Maintains All Nonvolatile Resources for 10
Years in the Absence of VCC at Room
Temperature
Power-Fail Reset
Early Warning Power-Fail Interrupt
Watchdog Timer

Software Security Feature
Executes Encrypted Software to Prevent
Unauthorized Disclosure

On-Chip, Full-Duplex Serial I/O Ports

Two On-Chip Timer/Event Counters

32 Parallel I/O Lines

Compatible with Industry Standard 8051
Instruction Set and Pinout

Optional Permanently Powered Real-Time
Clock (DS5000T)

As long as it's not protected I would expect so, if it is protected, then no.

Boomerang said:

DS5000T–32–16

Click to expand...

Boomerang said:

Is there any way to copy the contents of this microcontroller?

Click to expand...

No, not if the developer was building a sellable product. They likely used the integrated security/encryption features of the chip to lock access to code. If it was a DIY project, then, maybe.

So if Leave DS5000 Unlocked is checked during programming, the content can be copied and the same content can be programmed on another DS5000,
otherwise there is not even a theoretical possibility ?

Boomerang said:

So if Leave DS5000 Unlocked is checked during programming, the content can be copied and the same content can be programmed on another DS5000,
otherwise there is not even a theoretical possibility ?

Click to expand...

You can, in theory, start a research project to decrypt the code or grind off the top of the chip to see how each bit of ROM is programmed so, it depends on your definition of "theoretically possible".

it depends on your definition of "theoretically possible".

Click to expand...

if there is a possibility there is a way

Boomerang said:

if there is a possibility there is a way

Click to expand...

Only the ways I mentioned in post 5.

gophert said:

grind off the top of the chip to see how each bit of ROM is programmed

Click to expand...

There is no ROM on the chip. It uses a watch battery and RAM to hold the instructions.
They are good for 10 years of sitting with out being used. Then the RAM starts to go away. If your parts are as old as the ones I have the program might be erased.

gophert said:

Only the ways I mentioned in post 5.

Click to expand...

Post #5:

gophert said:

You can, in theory, start a research project to decrypt the code or grind off the top of the chip to see how each bit of ROM is programmed so, it depends on your definition of "theoretically possible".

Click to expand...

Fuming nitric acid is another way to decap a chip and gain access to the contents, so that statement was not exactly exhaustive...
There's less chance of damage when using fuming NHO3 compared to using grinding/milling techniques, where there is a potential risk from swarf being dragged around/pushed down onto the die.

Mickster said:

Post #5:

Fuming nitric acid is another way to decap a chip and gain access to the contents, so that statement was not exactly exhaustive...
There's less chance of damage when using fuming NHO3 compared to using grinding/milling techniques, where there is a potential risk from swarf being dragged around/pushed down onto the die.

Click to expand...

Not a technique for someone who, to identify the micro, had to post the marketing descrption.

If its just RAM... and as long as you can program THAT one.. Just write a routine to dump the ram serially WITHOUT writing to it..

If the DS5000 has been copy protected..... No!...