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RM0319 датащи(PDF) 189 Page - STMicroelectronics

номер детали RM0319
подробное описание детали  SPEAr320S architecture and functionality
PDF  368 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

RM0319 датащи(HTML) 189 Page - STMicroelectronics

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RM0319
MMC-SD card/SDIO controller
Doc ID 022640 Rev 3
189/368
Figure 63.
Data transaction sequence with SDMA
1.
Set the SDMA System Address register which contains the system memory address.
2.
Set the value to the Block Size register.
3.
Set the value to the Block Count register.
4.
Set the argument value to the Argument register.
5.
Set the value to the Transfer Mode register. The host driver determines Multi/Single
Block Select, Block Count Enable, Data Transfer Direction, Auto CMD12 Enable and
DMA Enable.
6.
Set the value to the Command register.
7.
Then wait for the Command Complete Interrupt.
8.
Write logic ‘1’ to the Command Complete in the Normal Interrupt Status register to
clear bit.
Start
End
(1)
(2)
(3)
(4)
(6)
(7)
(9)
(13)
(5)
(8)
(10)
(11)
(12)
(14)
Set System Address Reg
Set Block Size Reg
Set Block Count Reg
Set Argument Reg
Set Transfer Mode Reg
Set Command Mode Reg
Wait for
Command Complete Int
Command
Complete Int occur
Clr Command Complete Status
Get Response Data
Wait for
Transfer Complete Int
and DMA Int
Transfer
Complete Int
occur
Check Interrupt
Status
DMA Int occur
Clr DMA Interrupt Status
Set System Address Reg
Clr Transfer Complete Status
Clr DMA Interrupt Status



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