RM0082
RS_SDIO controller
Doc ID 018672 Rev 1
679/844
32.3 Signal
interface
Figure 68.
SDIO controller pin diagram
Table 610.
Signal interface
Group
Signal name
Direction
Size
Description
GLOBAL
HCLK
In
1
AHB system clock
HRESETn
In
1
AHB system reset
AHB SLAVE
In/Out
See AMBA
Specification
AHB MASTER
In/Out
See AMBA
Specification
CARD
INTERFACE
SD_CLK
Out
1
CLK to external
card
DATA
In/Out
8
SD1/SD4/SD8 :
Data line
SDIO_CMD
In/Out
1
SD1/SD4/SD8 :
Command line
SDIO_WP
In
1
Active high. SD
card write protect
SDIO_CD
In
1
Active low. Card
detection for single
slot
LED_ON
Out
1
To caution the
user not to remove
the card while the
SD card is being
accessed.
INTERRUPT
Interrupt to arm
Out
1
Interrupt request
given to arm
AHB SLAVE
AHB MASTER
INTERRUPT TO ARM
SD_CLK
DATA[7:0]
SDIO_CMD
SDIO_WP
SDIO_CD
LED_ON
SDIO Controller
CLK48MHz