Altera cyclone V Technical Reference page 1047

cv_5v4
2016.10.28
cmdarg Fields
Bit
31:0
cmd_arg
cmd
This register issues various commands.
Module Instance
sdmmc
Offset:
0x2C
Access:
RW
Important: To prevent indeterminate system behavior, reserved areas of memory must not be accessed by
31 30
start_ Reser use_
cmd ved hold_
reg
RW 0x0
0x1
15 14
send_ stop_ wait_
initial- abort prvda
ization _cmd ta_
compl
RW 0x0 RW
ete
0x0
0x0
SD/MMC Controller
Send Feedback
Name
Values indicates command argument to be passed to
card.
0xFF704000
software or hardware. Any area of the memory map that is not explicitly defined as a register
space or accessible memory is considered reserved.
29 28 27 26
volt_ boot_ disab
switc mode le_
h boot
RW
RW RW 0x0 RW
0x0 0x0
13 12 11 10
send_ trans read_
auto_ fer_ write
stop mode
RW
RW RW 0x0
0x0 0x0
RW
Description
Base Address
Bit Fields
25 24 23 22
expec enabl ccs_ read_
t_ e_ expec ceata
boot_ boot ted _
ack devic
RW RW
e
RW 0x0 0x0
0x0 RW
0x0
9 8 7 6
data_ check respo respo
expec _ nse_ nse_
ted respo lengt expec
nse_ h t
RW
crc
0x0 RW RW
RW 0x0 0x0
0x0
Access
Register Address
0xFF70402C
21 20 19 18
updat card_number
e_
RW 0x0
clock
_
regis
ters_
only
RW
0x0
5 4 3 2
cmd_index
RW 0x0
14-101
cmd
Reset
RW 0x0
17 16
1 0
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