Timeline for Are there chips encoded with fixed 8bit values?
Current License: CC BY-SA 3.0
10 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Dec 11, 2016 at 1:20 | comment | added | supercat | DS2401, though the basic ID chip seems to cost more than some microcontrollers. | |
| Dec 11, 2016 at 1:05 | comment | added | The Photon | @SteveK, yes, good find. | |
| Dec 11, 2016 at 1:00 | comment | added | Steve K | @The Photon (and supercat) - after seeing Ignacio comment I googled and found the DS2401 part I think this sounds like the mentioned "ID Chip" | |
| Dec 11, 2016 at 0:56 | comment | added | Steve K | @supercat - 1 wire GUID sounds like exactly what I need. Much of the other metadata that would normally go into an EEPROM will be maintained in a database. My primary requirement is a unique ID and GUID would sure provide that. What I don't know is if my DAQ hardware USB-1208HS from MCC Thanks for the help. | |
| Dec 11, 2016 at 0:54 | comment | added | The Photon | @SteveK, if the IO pins are bidirectional, you should be able to interface with an I2C EEPROM; however it will be very slow (milliseconds to 100's of ms per transaction). | |
| Dec 11, 2016 at 0:52 | comment | added | Steve K | @The Photon - You've piqued my interest about the use of the EEPROM, if nothing else it sounds like a good excuse to learn something new. First thing I need to find out is can my DAQ hardware interact with the EEPROM? I'll try looking for some intro tutorials on EEPROM to understand the communication mechanisms. | |
| Dec 11, 2016 at 0:52 | comment | added | Ignacio Vazquez-Abrams | Any of the DS memory chips should have such an ID. | |
| Dec 11, 2016 at 0:28 | comment | added | The Photon | @supercat, I was thinking of that when I went to Maxim's site and found the authenticator parts...but I didn't find the ID parts...got a link? | |
| Dec 11, 2016 at 0:26 | comment | added | supercat | Maxim (formerly Dallas) has some "one-wire" ID chips which make no pretext of being "secure", but can fairly easily read out a 64-bit ID which is guaranteed to be unique; with a little bit more work, if one has many such chips connected together it's possible to read the IDs of all of them. | |
| Dec 11, 2016 at 0:14 | history | answered | The Photon | CC BY-SA 3.0 |