RS_SDIO controller
RM0082
680/844
Doc ID 018672 Rev 1
32.4 Pin
signals
The Arasan SD2.0/SDIO2.0 Host Controller has six main interface groups:
●
ARM processor Interface signals.
●
SD2.0/SDIO2.0/MMC4.2 Card Interface that forms the main card interface.
●
System interface providing the clock and reset signals.
●
RAM Interface signals
Table 611.
AHB master/Target interface
Signal
DIR
Description
clk_ahb
In
AHB System Clock
m_hbusreq
OUT
AHB Bus request
m_hgrant
IN
AHB Bus grant
m_haddr[31:0]
OUT
DWord Address
m_hwdata[31:0]
OUT
AHB master write data
m_hrdata[31:0]
IN
Read data
m_hwrite
OUT
Write / Read Direction Indication
m_hsize[2:0]
OUT
Size (byte, half word or word)
m_hburst[2:0]
OUT
Burst Size
m_hready
IN
Ready signals
m_htrans[1:0]
OUT
Transfer type
m_hresp[1:0]
IN
Transfer response
int_to_arm
OUT
Interrupt to the ARM
t_hsel
IN
Slave select
t_haddr[5:0]
IN
DWord Address(256 bytes)
t_hwdata[31:0]
IN
Write data
t_hrdata[31:0]
OUT
Read data
t_hwrite
IN
Write / Read direction indication
t_hsize[2:0]
IN
Size (Byte, Half Word or Word)
t_htrans[1:0]
IN
Transfer Type
t_hready_in
IN
Slave ready input
t_hready
OUT
Slave ready
t_hresp[1:0]
OUT
Transfer response
Table 612.
SD2.0/SDIO2.0/MMC4.2 card interface
Signal
DIR
Description
clk_sdcard_out
OUT
SD/SDIO/MMC Clock
clk_sdcard_in
IN
SD/SDIO/MMC Clock
CMD_IN
IN
SD1/SD4/SD8: Command input