M24LR64E-R: I2C write to Configuration byte doesn't work

[steba]

Hello,

I am using ​M24LR64E-R. I am able to read system memory area and to read and write user memory via I2C, but If I try to write and update for example Configuration byte (address 2320, E2 = 1), the I2C write operation seems to be ok (no NACK received or error during write), but the Configuration byte is not updated. When I read back the location 2320 I get always the value F4h.

I don't think is a password protection problem because if I understand well the Configuration byte can be always read and write and anyway I have also tried to present the I2C password, but write to this register doesn't work.

Any idea and suggestion?

Thanks

[steba · Accepted solution]

​I solved. I was writing in a wrong way the address of the Configuration byte.