Is dedicated interrupt resource assigned for each pin with external pin interrupt ?

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User18151
Level 3
Level 3
First like received First solution authored
Hi all,

is dedicated interrupt resource assigned for each pin with external pin interrupt ?

Thank you for helping!

Best regards
Christine


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User18237
Level 5
Level 5
First solution authored First like received
Hi Christine,


No. Interrupt resource are shared with several external pin interrupts.

Interrupt resource is called SRN(Service Request Node) in AURIX.

In TC2XX and TC3XX, only 4 SRNs can be used for external pin interrupts.

Related Service Request Control Registers are below.

TC2XX : SRC_SCUERUm(m=0..3)

TC3XX : SRC_SCUERUx(x=0..3)

If they are needed more external edge and level interrupts then they can be generated in an indirect way via GTM/TIM.


Hope this helps!

Best regards
Mr. AURIX™
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