AM6421 datasheet(118/237 Pages) TI

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• Power on the board per the power-up sequencing. No voltage should be applied on the VPP terminal during

power up and normal operation.

• Load the OTP write software required to program the eFuse (contact your local TI representative for the OTP

software package).

• Apply the voltage on the VPP terminal according to the specification in Section 7.8.1.

• Run the software that programs the OTP registers.

• After validating the content of the OTP registers, remove the voltage from the VPP terminal.

7.8.4 Impact to Your Hardware Warranty

You accept that e-Fusing the TI Devices with security keys permanently alters them. You acknowledge that the

e-Fuse can fail, for example, due to incorrect or aborted program sequence or if you omit a sequence step.

Further the TI Device may fail to secure boot if the error code correction check fails for the Production Keys or if

the image is not signed and optionally encrypted with the current active Production Keys. These types of

situations will render the TI Device inoperable and TI will be unable to confirm whether the TI Devices conformed

to their specifications prior to the attempted e-Fuse. CONSEQUENTLY, TI WILL HAVE NO LIABILITY

(WARRANTY OR OTHERWISE) FOR ANY TI DEVICES THAT HAVE BEEN e-FUSED WITH SECURITY KEYS.

AM6442, AM6441, AM6421

AM6412, AM6411

SPRSP56 – JANUARY 2021

www.ti.com

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Product Folder Links: AM6442 AM6441 AM6421 AM6412 AM6411

AM6421 Datasheet(PDF) 118 Page - Texas Instruments