Altera Cyclone V Device Handbook page 718

11-40
cmd Register Settings for Single-Block and Multiple-Block Reads
Related Information
• Card Read Threshold
Refer to this section for information about the thresholds for a card read.
• cmd Register Settings for Single-Block and Multiple-Block Reads
Refer to this table for information about the settings for Single-Block and Multiple-Block Reads.
cmd Register Settings for Single-Block and Multiple-Block Reads
Table 11-17: cmd Register Settings for Single-Block and Multiple-Block Reads (Default)
Parameter
start_cmd
use_hold_reg
update_clk_regs_only
data_expected
card_number
transfer_mode
send_initialization
stop_abort_cmd
send_auto_stop
read_write
response_length
response_expect
Altera Corporation
on page 11-57
Value
1
1 or 0
0
1
1
0
0
0
0 or 1
0
0
1 or 0
†
†
on page 11-40
†
Comment
This bit resets itself to 0 after the command is
committed.
Choose the value based on speed mode being used.
Does not need to update clock parameters
Data command
For one card
Block transfer
1 for a card reset command such as the SD/SDIO
GO_IDLE_STATE command
0 otherwise
1 for a command to stop data transfer such as the
SD/SDIO STOP_TRANSMISSION command
0 otherwise
Refer to Auto Stop for information about how to
set this parameter.
Read from card
1 for R2 (long) response
0 for short response
0 for commands with no response, such as SD/
SDIO GO_IDLE_STATE, SET_DSR, and GO_
INACTIVE_STATE.
1 otherwise
cv_54011
2013.12.30
SD/MMC Controller
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