DataFlash OTP support (Security Register)
configname: CONFIG_MTD_DATAFLASH_OTP
Linux Kernel Configuration
└─>Device Drivers
└─>Memory Technology Device (MTD) support
└─>Self-contained MTD device drivers
└─>DataFlash OTP support (Security Register)
In linux kernel since version 2.6.28 (release Date: 2008-12-24)
Newer DataFlash chips (revisions C and D) support 128 bytes of
one-time-programmable (OTP) data. The first half may be written
(once) with up to 64 bytes of data, such as a serial number or
other key product data. The second half is programmed with a
unique-to-each-chip bit pattern at the factory.
one-time-programmable (OTP) data. The first half may be written
(once) with up to 64 bytes of data, such as a serial number or
other key product data. The second half is programmed with a
unique-to-each-chip bit pattern at the factory.