RM0091 - is FLASH prefetch after reset on or off?

[waclawek.jan]

In RM0091, rev.9, 3.5.1 Flash access control register (FLASH_ACR):

Reset value: 0x0000 0000

[...]

Bit 4 PRFTBE: Prefetch buffer enable

 0: Prefetch is disabled

In RM0091, rev.9, Prefetch controller  within 3.2.1:

After reset, the state of the prefetch buffer is on.

ST, please clarify.

JW

(https://community.st.com/s/question/0D50X00009XkaBB/stm32f0xx-findings last post)

[Imen.D]

Hello @Community member​ ,

Thanks for your post.

I will check this and take the necessary action.

Edit: you can enable Prefetch at startup, very low consumption impact and software overhead for granted improve performance, except if you run at 24MHz max freq.

Imen

[waclawek.jan]

Thanks, Imen.

Jan