4 ms·
All except for the cheapest microcontrollers (everything above half dollar) have serial numbers (unique identifiers) burned into one time programmable memory.
by mmoskal 2y ago
All except for the cheapest microcontrollers (everything above half dollar) have serial numbers (unique identifiers) burned into one time programmable memory.
- 15155 2y agoARM M0 cores at 9 cents have unique IDs burned into flash OTP typically in my experience.
- Tempest1981 2y agoAnyone remember the Dallas Semiconductor DS2400/DS2401 https://www.analog.com/media/en/technical-documentation/data-sheets/DS2401.pdf https://www.analog.com/media/en/technical-documentation/data... 1-Wire, unique 48-bit ID. I don't remember the year it was introduced, or cost.
- tivert 2y ago> 1-Wire, unique 48-bit ID. I don't remember the year it was introduced, or cost. IIRC, their 1-wire temp sensors also have that (at least they did about 10 years ago when I was messing around with hobbyist electronics): https://www.adafruit.com/product/374 https://www.adafruit.com/product/374
- mmoskal 2y agoRight some of them do. I just recall the cheapest STM32G0s not having them (though they did have OTP so you could burn it yourself).
- brucehoult 2y agoThe $0.10 WCH CH32V003 RISC-V microcontroller has a 64 bit unique ID on each chip.