RM0319 datasheet(190/368 Pages) STMICROELECTRONICS

190 / 368 page

MMC-SD card/SDIO controller

RM0319

190/368

Doc ID 022640 Rev 3

Read Response register and get necessary information of the issued command.

10. Wait for the Transfer Complete Interrupt and DMA Interrupt.

11. If Transfer Complete is set to logic ‘1’, go to Step (14) else if DMA Interrupt is set to

logic ‘1’, go to Step 12. Transfer Complete is higher priority than DMA Interrupt.

12. Write logic ‘1’ to the DMA Interrupt in the Normal Interrupt Status register to clear this

bit.

13. Set the next system address of the next data position to the System Address register

and go to Step (10).

14. Write logic ‘1’ to the Transfer Complete and DMA Interrupt in the Normal Interrupt

Status register to clear this bit.

14.5.7

Transferring data with ADMA

Figure 64.

Data transaction sequence with ADMA

Start

End

(1)

(2)

(3)

(4)

(6)

(7)

(9)

(14)

(5)

(8)

(11)

(12)

(13)

Create Discriptor table

Set ADMA System Address Reg

Set Block Count Reg

Set Argument Reg

Set Transfer Mode Reg

Wait for

Command Complete Int

Command

Complete Int occur

Clr Command Complete Status

Get Response Data

Wait for

Transfer Complete Int

and ADMA Error Int

ADMA Error Int occurs

Check Interrupt

Status

Transfer Complete Int occurs

Clr Transfer Complete

Interrupt Status

Clr ADMA Error

Interrupt Status

Set Command Reg

Set Block Size Reg

Abort ADMA

Operation

(10)

(15)

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