36.1 Description

The OTP Memory Controller (OTPC) is the secure interface between the system and the OTP memory.

The default value of a memory bit is logic ‘0’ (not programmed). A programmed memory bit is logic ‘1’.

An OTP matrix is a type of non-volatile memory. Each bit in the matrix can be programmed only once. The bits are used to store data such as:

calibration bits for analog cells (e.g. RC oscillators, etc.),
hardware configuration settings (e.g. JTAG disable, etc.),
chip identifiers,
key data invisible by software,
user data.

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