I got a doubt about an interrupt grouping in stm32f103. In programming manual of microcontroller I found 5 ways to configure it. enter image description here

But, while debugging, I found 8 ways. enter image description here How is it possible to get extra 3 ways, when only 4 bits of Interrupt Priority Registers are implemented?

  • \$\begingroup\$ Maybe the tool supports all the Cotex controllers out there which might implement all bits and doesn't care for your controller restrictions? \$\endgroup\$ – Arsenal Dec 24 '17 at 11:12
  • \$\begingroup\$ But, the toolchain is Keil uVision5 from official website for stm32 \$\endgroup\$ – UMID Dec 25 '17 at 3:49
  • \$\begingroup\$ Keil uVision supports any kind of microcontroller. Don't know if it supports limiting the register values like the Lauterbach tools do. \$\endgroup\$ – Arsenal Dec 25 '17 at 11:14
  • \$\begingroup\$ Ok,I understood! \$\endgroup\$ – UMID Dec 25 '17 at 13:57

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