What is address offset?

[Ken Inoue]

Posted on December 01, 2017 at 11:17

I am Japanese. Because there is little information on Japanese STM 32, please let me ask a simple question here.

What is address offset? According to RM 0364 Reference manual ''STM 32 F 334 x x advanced ARM®-based 32-bit MCUs'', the address offset of TIM1 prescaler is 0x28.

What is address offset? My question is what is the address of TIM 1?

Boundary address of TIM1 is 0x40012C00-0x40012FFF. So address of TIM1 prescaler is 0x40012C00+0x28=0x40012C28?

I want hints.

Best Regards,

Ken Inoue.

[AvaTar · Accepted solution]

Posted on December 01, 2017 at 11:39

Boundary address of TIM1 is 0x40012C00-0x40012FFF. So address of TIM1 prescaler is 0x40012C00+0x28=0x40012C28?

Exactly.

Address offset is in this case referenced to the base address of the peripheral.

The reference manual for STM32 MCUs usually contain a section 'Memory map and register boundary addresses', which lists the base addresses of all peripherals in a MCU.

For example, it is section 3.2, page 51 in the F303/F328/F358/F398 manual (doc. number RM0316, ID 022558).

[Ken Inoue]

Posted on December 01, 2017 at 13:24

Thank you for your quick reply.

Thanks a lot.

Best Regards,

Ken Inoue