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•
Only one card connected to the bus.
•
Raw mode, image data read directly from sectors in the user area.
•
File system mode (FAT12/16/32 supported with or without Master Boot Record), image data is read
from a booting file.
21.7.4.2 System Interconnection
An SD card can be connected to the MMC1 interface typically through a card cage.
Notes:
•
It may be possible to design the system so that an eSD memory type is connected to MMC1
interface. However, the dual voltage IOs feature of MMC1 dedicates it preferably to cards.
•
The ROM Code does not handle the card detection feature on card cage.
21.7.4.3 Booting Procedure
The high level flowchart of the eSD and SD booting procedure is depicted in
file is searched only in case of booting from a card. eSD embedded memories only support raw mode.
No
Failed
SPRUGX9 – 15 April 2011
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Preliminary
Figure 21-17. SD Booting
Not Detected
The Booting File is Searched
Only in Case of MMC/SD Card
Booting File
Found?
Get the Booting File
© 2011, Texas Instruments Incorporated
Figure
21-17. The booting
MMC/SD Booting
Initialize the MMC/SD Driver
Detect Card
or Embedded
Memory
Detected
Configure the Card Address
(RCA)
No
"Raw Mode"
Detected?
Yes
Get Raw Data
Success
ROM Code Memory and Peripheral Booting
Memory Booting
2013
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