i.MX6solo MAPSR register Should bit16 be set?

[Ryo_Aoki]

Hi NXP.
I have a question about the i.MX6 solo's MAPSR register.
Looking at the register details in 45.12.17, the reset value of bit16 is 0.
Therefore, I think it is appropriate to set bit 16 to 0 when writing to the MAPSR register.

However, as shown below, in the document, 1 is set when writing to the MAPSR register.

ex1) 45.8 LPDDR2 Refresh Rate Update and Timing Derating

1. Set MAPSR to 0x00010107

5. Write MAPSR to 0x00010106 to re-enable this feature

ex2) i.MX6DL Register Programming Aids

https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/i-MX6DL-Register-Programming-Aids/ta-p/1...

In the Excel file, 1 is written as a fixed value to bit 16 of the MAPSR register.

Should bit16 be set to 1 when writing to the MAPSR register?
I would like to know the recommended value to write to bit16.

Best regards.

[Rita_Wang · Accepted solution]

For the 19–16 This field is reserved. So for the bit 16 you can use the value in the

MX6DL_MMDC_LPDDR2_register_programming_aid_v1.4.xlsx