One-time programmable memory. A memory structure where data is permanently stored by physically altering the chip, often by blowing microscopic fuses or anti-fuses. Once the bits are set, they cannot be erased or rewritten, making it ideal for storing permanent serial numbers, calibration data, or secure boot keys.
We need to burn the MAC address into the OTP region before the boards leave the testing jig.
Always double-check your data before programming an OTP sector. A single flipped bit turns the chip into a paperweight.
Also heard as
- one-time programmable
Related terms
eFuse
A microscopic, one-time-programmable fuse built into a silicon chip.
ROM
A class of non-volatile semiconductor storage retains its data without power and is designed primarily for reading rather than writing.
EPROM
An erasable programmable read-only memory is a non-volatile chip that can be wiped with ultraviolet light.