Texas Instruments TMS320DM644x manual Fifo Operation During Card Write Diagram

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Peripheral Architecture

Figure 11. FIFO Operation During Card Write Diagram

	FIFO Check1/Start
Yes	FIFO
	full
	?
	No
	Capture data,
	no DMA pending
	Increment counter
No	Counter
	=FIFOLEV
	?
	Yes
	Generate DMA
	Reset counter
	FIFO check 2
Yes	FIFO
	full
	?
	No
	Capture data,
	DMA
	Increment counter		Idle, DMA pending
	Counter	Yes
	=FIFOLEV	No	DMA
	?		done
			?
	No
			Yes
No	DMA		Generate DMA
	done
	?		Reset counter
	Yes

22 Multimedia Card (MMC)/Secure Digital (SD) Card Controller SPRUE30B –September 2006

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