EAGLE
PRELIMINARY
Ver 1.3
5
R/W
R/W
R/W
R/W
R/W
R/W
FIFO full Interrupt enable
0 : disable
1 : enable
FIFO half full Interrupt enable
0 : disable
1 : enable
FIFO empty Interrupt enable
0 : disable
1 : enable
End command response Interrupt enable
0 : disable
0b
0b
0b
0b
0b
0b
4
3
2
1
0
1 : enable
Write operation done Interrupt enable
0 : disable
1 : enable
Read operation done Interrupt enable
0 : disable
1 : enable
SDCSTAT[15:8] corresponds to the interrupt source while SDCIE register enables the interrupt. When an ISR (Interrupt
Service Routine) is performed after an interrupt occurs, the bit located in SDCSTAT[15:8] which corresponds to that
interrupt source should be cleared to ‘0’ by ISR. However, the interrupt sources corresponding to card insertion detection
(SDCSTAT[15]) and card removal detection (SDCSTAT[14]) are not cleared. Hence their corresponding enabling register
bits should be cleared by ISR.
3.11.4.9 SDC Command Control Register (SDCCMDCON)
SDCCMDCON is used by user to send a command. When user writes a command to SDCCMDCON, the corresponding
command is transferred to SD Card.
Address: FFE0 2420h
Bit
31 : 11
10
R/W
R
R/W
Description
Default Value
Reserved
-
0b
This bit indicates whether the command type requires a response or not.
When configured as “no response”, response shall not be stored in the
response buffer.
0 : no response
1 : wait for response
9 : 8
R/W
These bits indicate the type of response. As response type is dependent on
00b
the command, proper response type selection with reference to the
command type is needed.
00 : short response (48bit)
01 : short response with busy (R1b)
10 : long response (136bit)
7
6
R/W
R/W
R/W
This bit indicates whether a command requires a data token or not. This
bit should be set to ‘1’ for read or write command.
0 : without data
1 : with data
This bit configures the I/O direction of data FIFO. For read command,
this bit is set as ‘0’. For write command, this bit is set as ‘1’.
0 : read data
1 : write data
0b
0b
5 : 0
These bits indicate the number of command. Since the meaning of
00h
command number in MMC is different from SD Card, refer to their
respective specification for further details.
00h = CMD0
01h = CMD1
...
3Fh = CMD63
Beijing Peak Microtech Co.Ltd.
CONFIDENTIAL
118
ETC [ ETC ]
