Altera cyclone V Technical Reference page 1041

cv_5v4
2016.10.28
ctype Fields
Bit
16
card_width1
0
card_width2
blksiz
The Block Size.
Module Instance
sdmmc
Offset:
0x1C
Access:
RW
Important: To prevent indeterminate system behavior, reserved areas of memory must not be accessed by
31 30
15 14
SD/MMC Controller
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Name
Indicates if card is 8 bit or othersize. If not 8-bit,
card_width2 specifies the width.
Value
0x0
0x1
Ignored if card_width1 is MODE8BIT.
0x0
0x1
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
13 12 11 10
Description
Description
Non 8-bit mode
8-bit mode
Value Description
1-bit mode
4-bit mode
Base Address
Bit Fields
25 24 23 22
Reserved
9 8 7 6
block_size
RW 0x200
Access
Register Address
0xFF70401C
21 20 19 18
5 4 3 2
14-95
blksiz
Reset
RW 0x0
RW 0x0
17 16
1 0
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