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What's so special about the "GIO module"?

Audun Knudsrod
Intellectual 300 points
Other Parts Discussed in Thread: RM44L520, HALCOGEN

Hi,

I am familiarizing myself with the Hercules controllers, and have a question about why there's a separate GIO table, but only for a small selection of pins.

The MCU in question is the RM44L520, it lists a "GIO Port A" and a "GIO Port B", but I have noticed in the HALCOGEN that most, if not all, pins has a GIO mode.

So is there something special only these pins can do? Like generating generic external pin interrupts, or more flexible interrupts?

In what cases would I particularly want to use one of these pins, rather than e.g. just a spare MibSPI pin?

Best regards

Audun Knudsrod

R&D Engineer, Kongsberg Maritime

  • 0
    TI__Guru 68920 points
    Very little, mainly that the GIO pins are interrupt capable 'directly' rather than through a more indirect route [like programming an edge detect in a HET GIO].

    This family uses the concept of keeping the IO port control inside each module rather than having a separate global GIO that controls all the pins on the device but has to be muxed.