Ver 1.3
PRELIMINARY
EAGLE
3.11.4 Register Description
3.11.4.1 SDC Control Register (SDCCON)
Address : FFE0 2400h
Bit
31 : 6
5
R/W
R
R/W
Description
Default Value
Reserved
MMC/SD HC Enable
-
0b
Enable bit for SD Controller. If this bit is set as “Disable”, the controller
will return to initial state and all buffers are cleared.
0 : Disable (Controller is initialized)
1 : Enable
4 : 3
R/W
R/W
Memory access type
This bit decides the byte size for reading or writing data to system
memory.
00 : Bytes access, read or write data in 1 byte unit.
01 : short access, read or write data in 2 byte unit.
10 : long access, read or write data in 4 byte unit.
11 : not used.
00b
0b
2
DMA mode selection
This bit enables fast data transmission mode using GDMA which is
available in Eagle platform.
0 : Normal mode (data transfer by CPU)
1 : DMA mode (data transfer by GDMA)
Bus width Selection
0 : 1bit data bus
1 : 4bit data bus
1
0
R/W
R/W
0b
0b
MMC/SD clock enable
0 : Disable
1 : Enable
3.11.4.2 SDC Status Register (SDCSTAT)
Address: FFE0 2404h
Bit
31 : 16
15
R/W
R
R
Description
Default Value
Reserved
Card_Insertion
-
0b
This bit indicates the insertion of SD Card through data line[3]. Pull-
down resistor should be added to data line[3].
0 : No card insertion detection
1 : Card insertion detected
14
R
Card_Removal
0b
This bit indicates the removal of SD Card through data line[3].
0 : No card removal detected
1 : Card removal detected
13
12
11
10
R
R
FIFO full
0b
0b
1b
0b
This bit indicates that the 64-byte data FIFO is in full
FIFO half full
This bit indicates that the 64-byte data FIFO is half-full.
R
FIFO empty
This bit indicates that the 64-byte data FIFO is empty.
Command & response transaction done
This bit indicates the completion of a transaction which includes the
reception of response from SD Card as accordance to the command sent
by Controller. This bit is also set to ‘1’ when a transaction completes with
an error condition, such as response is not received.
0 : Command and response transaction is in progress
1 : Command and response transaction is done
Write operation done
R/C
9
R/C
0b
115
CONFIDENTIAL
Beijing Peak Microtech Co.Ltd.
ETC [ ETC ]
