the RM0090 reference manual for 2014 ,in the description of the “Chip Select togglest�? different from RM00990 reference manual for 2018，why？

[cxiao.6]

the RM0090 reference manual for 2014 ,in the description of the “Chip Select togglest�? different from RM00990 reference manual for 2018，which one is correct？The results of our tests are consistent with reference manual for 2014,Is it wrong in RM00990 reference manual for 2018?

2018 version

2014 version

[cxiao.6]

anyone know？​

[Imen.D]

Hello,

We will check this internally and come back to you with clarification.

Kind Regards,

Imen

[Tesla DeLorean]

Probably because RM0090 covers a broader range of parts, and that expanded over time, and also covers multiple die steppings where errata were addressed, or IP updated. Perhaps someone pointed out behaviour that was different to that described.

[Imen.D]

Hello,

The sentence in the RM0090 reference manual for STM32F4 (2018 version) is correct.

Can you precise which mode are you using ?

Kind Regards,

Imen

[cxiao.6]

Modul 1​

[cxiao.6]

mode 1​

[cxiao.6]

MODE 1

[waclawek.jan]

Probably this question related to https://community.st.com/s/question/0D50X0000BytjcCSQQ/i-have-a-questionwhen-changed-cpu-from-stmf407-to-stm32f427-sometimes-read-a-wrong-data-from-extern-sram-access-by-fmc-its-happend-in-most-of-the-cases-in-interrupt-someone-have-the-same-problem ?

JW