Altera cyclone V Technical Reference page 1042

14-96
bytcnt
blksiz Fields
Bit
15:0
block_size
bytcnt
The number of bytes to be transferred.
Module Instance
sdmmc
Offset:
0x20
Access:
RW
31 30
15 14
bytcnt Fields
Bit
31:0
byte_count
intmask
Allows Masking of Various Interrupts
Altera Corporation
Name
The size of a block in bytes.
29 28 27 26
13 12 11 10
Name
This value should be an integer multiple of the Block
Size for block transfers. For undefined number of byte
transfers, byte count should be set to 0. When byte
count is set to 0, it is responsibility of host to explicitly
send stop/abort command to terminate data transfer.
Note: In SDIO mode, if a single transfer is greater
than 4 bytes and non-DWORD-aligned, the transfer
should be broken where only the last transfer is non-
DWORD-aligned and less than 4 bytes. For example,
if a transfer of 129 bytes must occur, then the driver
should start at least two transfers; one with 128 bytes
and the other with 1 byte.
Description
Base Address
0xFF704000
Bit Fields
25 24 23 22
byte_count
RW 0x200
9 8 7 6
byte_count
RW 0x200
Description
Access
Register Address
0xFF704020
21 20 19 18
5 4 3 2
Access
cv_5v4
2016.10.28
Reset
RW 0x200
17 16
1 0
Reset
RW 0x200
SD/MMC Controller
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