Altera cyclone V Technical Reference page 1001

cv_5v4
2016.10.28
Parameter
data_expected
card_number
transfer_mode
send_initialization
stop_abort_cmd
send_auto_stop
read_write
response_length
response_expect
Table 14-25: cmd Register Settings for Single-Block and Multiple-Block Write (User Selectable)
Parameter
wait_prvdata_complete
check_response_crc
cmd_index
Related Information
Auto-Stop
Refer to this table for information about setting the
Stream Read and Write
In a stream transfer, if the byte count is equal to 0, the software must also send the SD/SDIO STOP
command. If the byte count is not 0, when a given number of bytes completes a transfer, the controller
sends the STOP command automatically. Completion of this AUTO_STOP command is reflected by the
SD/MMC Controller
Send Feedback
Value
0 or 1
Value
Command
Index
on page 14-29
1 Data command
1 For one card
0 Block transfer
0 Can be 1, but only for card reset commands such as SD/
SDIO GO_IDLE_STATE
0 Can be 1 for commands to stop data transfer such as SD/
SDIO STOP_TRANSMISSION
Refer to Auto Stop for information about how to set this
parameter.
1 Write to card
0 Can be 1 for R2 (long) responses
1 Can be 0 for commands with no response. For example,
SD/SDIO GO_IDLE_STATE, SET_DSR, GO_
INACTIVE_STATE etc.
1 0—Sends command to the CIU immediately
1—Sends command after previous data transfer ends
1 0—Controller must not check response CRC
1—Controller must check response CRC
Set this parameter to the command number. For
example, set to 24 for SD/SDIO WRITE_BLOCK
(CMD24) or 25 for WRITE_MULTIPLE_BLOCK
(CMD25).
send_auto_stop
Stream Read and Write
Comment
†
Comment
parameter.
Altera Corporation
14-55