Possible wrong FLASH_ACR description in STM32G0 RM

[Andreas Bolsch]

STM32G071RB: According to RM 3.7.1 reset value of FLASH_ACR is 0x00040600, verified on hardware. But the description of indiviual bits doesn't fit.

RM: Bit 11 ICRST, Bit 10 reserved (cleared), Bit 9 ICEN, Bit 8 PRFTEN, so cache enabled, prefetch disabled, reserved bit set???

[Antoine Odonne · Accepted solution]

​Hello Andreas,

Thank you for your comment, the error is in documentation, bit 10 is set indeed, RM will be updated in order to change the description for "Reserved, must be kept at reset value".

In other series this bit is used to enable DATA cache, which is ON after reset, but on G0 there is no DATA cache. This bit must be kept at reset value consequently.

Best regards,

Antoine