IMXRT102XSRM - Fuse map discrepancies.

[rshipman]

Hi,

I found some fusemap discrepancies in the manual:

Security Reference Manual for the i.MX RT102x Processor
IMXRT102XSRM
Rev. 0, 07/2020

#### Problem 1:

In tables 4-2 to 4-7, we have these settings:

0x470[1] L1 D-Cache DISABLE
0x470[20] Reserved
0x470[23] USDHC_CMD_OE_PRE_EN
0x470[30:24] MMC_DLL_DLY[6:0]

But in Table 4-9. Fusemap Descriptions, these are different:

0x470[1] BT_MPU_DISABLE
0x470[20] BT_LPB_POLARITY
0x470[23] Reserved
0x470[30:24] MMC_DLL_DLY[6:0]  Setting field differs: "Conneted to LVDS module."

Which ones are correct please?
Similar problems seem to appear in manuals:
i.MX RT1020 Processor Reference Manual, Rev. 2, 01/2021
i.MX RT1050 Processor Reference Manual, Rev. 3, 8/2019

#### Problem 2:

In Table 4-9. Fusemap Descriptions, fuses 0x460[7:6] seem to be described twice:

0x460[6] Reserved
0x460[7] Reserved
0x460[7:6] FLASH_CONNECTION_SEL

Which ones are correct please?

Many thanks and kind regards,
Ronnie

[FelipeGarcia]

Hi Ronnie,

I have received confirmation from internal team. Please check it below:

• For issue #1, 0x470[1] BT_MPU_DISABLE, etc. in Table 4-9. Fusemap Descriptions is correct for RT10xx . Doc team will fix the corresponding part in table 4-2 to 4-7.
• For issue #2,  0x460[7:6] Reserved  is correct for RT10xx. 

Thank you for bringing this to our attention.

Best regards,

Felipe

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[rshipman]

Hi Felipe,

Thanks for your reply.

Regarding issue #1:

Unfortunately what you said about BT_MPU_DISABLE seems to contradict this posting: https://community.nxp.com/t5/i-MX-RT/RT1020-RT1050-ref-manual-issue-BT-MPU-DISABLE-and-L1-I-Cache/m-...

Also, I just want to confirm that all the settings in #1 are correct in table 4-9 (and incorrect in the other tables)?

Kind regards,

Ronnie

[FelipeGarcia]

Hi Ronnie,

Sorry for the late reply, I have confirmed with my colleague and with internal team that the information from my previous reply is correct.

Best regards,

Felipe

[rshipman]

Thank you.

[FelipeGarcia]

Hi Ronnie,

Thank you for reporting this with us. I am going to check internally and I will update this thread when I receive confirmation about this.

Best regards,

Felipe