NT3H2111 - FAST_WRITE in AUTHENTICATED state

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NT3H2111 - FAST_WRITE in AUTHENTICATED state

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aledh
Contributor I

What is the expected behaviour of the FAST_WRITE command whilst in the AUTHENTICATED state?

The NT3H2111 datasheet doesn't make it very clear - from experimentation it appears I can do a FAST_WRITE to write the entire SRAM in this state but then the device appears to transition out of AUTHENTICATED as I can no longer read/write of protected memory until I issue a PWD_AUTH again.

The data sheet isn't totally clear.

Thanks!

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Jonathan_Iglesias
NXP TechSupport
NXP TechSupport

Hi @aledh 

Hope you are doing great, would it be possible that you share a command log between the reader and the NTAG I2C ?  so I can see what might be happening and if something is being sent incorrectly ?

BR

 

Jonathan

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