Is STM32H725 VTOR bit assignments is not correspond ARM7M arcitecture?

[Aleks]

Hi!

ST manual PM0253:

[31:9] TBLOFF Vector table base offset field. It contains bits [29:7] of the offset of the table base from the bottom of the memory map.

[8:0] - Reserved

Arm v7-M Architecture Reference Manual:

Bits[31:7] of the vector table address.

Older documentation describes this field as the vector table address offset. The description

in this manual clarifies the use of this register.

Bits[6:0] - Reserved

Is there wrong assignment description in PM0253?

[Pavel A. · Accepted solution]

For STM32H7 the vectors address must be aligned at least on 0x400

Learned in a hard way ((

See at end of this thread. @Piranha​ explains it.

Yes, on M7 VTOR is the vector table base address - including the lower zero bits - because of alignment requirement.

[Tesla DeLorean]

It depends on how the ARM IP builds​ based on the number of interrupt used by the NVIC, unused inputs are optimized away.

[Aleks]

Great thanks for additional material.