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Anyone know what the SDIOIT bit means?

Question asked by van_hooft.frank.001 on Dec 28, 2011
In the STM32F2xx / 4xx SDIO peripheral there's a bit in the status register SDIO_STA called SDIOIT. The description says it's a dynamic bit meaning "SDIO interrupt received". Does anyone know what this bit really means, what it's trying to tell us? I see it being set sometimes in our interrupt handler, and I've no idea how to interpret it. I'm wondering if it's perhaps somehow related to the NVIC.