I have a doubt about the STM32F4XXX reference manual

[fang liang]

there is maybe a mistake at the page 99 in the RM0090 Reference manual document:

the bit area 12 is valid or not?

[Imen.D]

Hello @fang liang​ ,

Can you please describe clearly the issue with bit 12 ?

Why is that not valid ?

Imen

[MFran.4]

I guess it's because the range 31:11 is declared Reserved, but just below you have bit 12 and 11 shown as readable and/or writable.

bits 12 and 11 are in the range 31:11.

[MFran.4]

Should the reserved bits be 31:13 or should bits 12 and 11 be reserved?

[TDK · Accepted solution]

Bits 31:13 should be marked as reserved, instead of 31:11.

It is correct in 3.9.1 but incorrect in 3.9.2.

[Imen.D]

The reserved bits should be Bits 31:13, as answered @TDK​.

The typo is raised internally for correction in the coming release of the RM0090.

Thanks for your contribution.

Imen

[fang liang]

thank you for all​

[Piranha]

Also the PM0059 has exactly the same error.