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MQi.1
MQi.1
Senior II
December 5, 2023
Solved

A question about F103C8T6 memory map.

  • December 5, 2023
  • 1 reply
  • 1967 views

I found in "Figure 11. Memory map" of "Datasheet - production data for STM32F103x8", the address span between Port A and Port B is 1024(0x4001 0c00 - 0x40010800 = 32*32 bits), while I found in "RM0041 - Reference manual STM32F100xx advanced Arm ® -based 32-bit MCUs", there are only 7 32-bit registers for Port A, and there are not preserved space there, so my question is what is the other 25 32-bit space, are they used for remapping "I/Os alternate function configuration"?

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Best answer by TDK

They're nothing. They either don't exist and/or aren't meant to be used by the user.

Keep in mind you're interacting with registers, not memory. There is no reason that the space needs to be contiguous.

1 reply

TDK
TDKBest answer
December 5, 2023

They're nothing. They either don't exist and/or aren't meant to be used by the user.

Keep in mind you're interacting with registers, not memory. There is no reason that the space needs to be contiguous.

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