PMIC PF8200

[iaboelen]

Hello 

I am using PMIC PF8200 with cortex M7, i can read data from the PMIC but when i try to write ,noting is written , i am using CRC8 and i can calculate it correctly and it matches with the CRC from PMIC in case i am reading , but when i send request to modify ant register the flag for CRC (CRC_I) becomes 1 indication to a CRC flier.

the format i am sending is (REG_ADD , Data , CRC)    

Did i miss something ? 

[iaboelen]

Hello ,

i got all information i need , thanks for your support.

Best regards 

[diazmarin09]

Hello iaboelen,

I hope all is great with you. Thank you for using the NXP communities.

Could you please review the questions below for a better understanding?

Do you mean the I2C CRC verification?

When this feature is enabled, a selectable CRC verification is performed on each I2C transaction. Could you please confirm that it is enabled (OTP_I2C_CRC_EN = 1)?

Are you trying to perform an I2C secure write? When OTP_I2C_ SECURE_EN = 1, the secure write is enabled. I guess you are trying to write the secure registers.

Regards,
David

[iaboelen]

Hello,

the I2c verification is on so that i am using CRC calculations ,

also i am not writing on secure write i am trying to write on normal read write (R/W) Reg.

Best Regards;

[iaboelen]

Hello,
the I2c verification is on so that i am using CRC calculations ,
also i am not writing on secure write i am trying to write on normal read write (R/W) Reg.
Best Regards;

[diazmarin09]

Hello iaboelen,

Once again, thank you for using the NXP community.

As mentioned on the case, I do recommend reviewing the application note AN13107.

At chapter 2, you may find useful information about the I2C-bus overview. Are you able to perform an I2C bus write with CRC verification operation (chapter 2.4.1)?

Please let me know if this material is useful for you.

Regards,

David