RM0468 - BOR_LVL discrepancy

[embd]

Hi

While reviewing some specs for the SW developers, we noticed some inconsitency between the datasheet and reference manual of the STM32H735.

The DS states four VBOR thresholds (VBOR0 to VBOR3).

In the RM, the description of Bits 3:2 BOR_LEV[1:0] is different for the read-only register FLASH_OPTSR_CUR and the programming register FLASH_OPTSR_PRG. The former states four VBOR thresholds (VBOR2 is 0b10), the latter refers to a nominal voltage level (2.4V - approx. VBOR2 - is 0b01). 

Can you please clarify. 

Thanks! 

[KDJEM.1]

Hello ​@embd and welcome to the community;

 

Thank you for reporting this issue.

 The BOR_LEV bit description in FLASH_OPTSR_PRG  should be:
Bits 3:2 BOR_LEV: Brownout level option configuration bit
These option bits are used to define the power level that generates a system reset.
00: VBOR0, brownout reset threshold 0
01: VBOR1, brownout reset threshold 1
10: VBOR2, brownout reset threshold 2
11: VBOR3, brownout reset threshold 3

This issue is radiale reported internally for checking and fixing.

Internal ticket number 139749 (This is an internal tracking number and is not accessible or usable by customers).  

 

Thank you.

Kaouthar