Altera cyclone V Technical Reference page 998

14-52
cmd Register Settings for Single-Block and Multiple-Block Reads
Figure 14-15: Command Argument for IO_RW_EXTENDED (CMD53)
Command Index
Function Number
Register address
Byte/Block Count
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 14-22: cmd Register Settings for Single-Block and Multiple-Block Reads (Default)
start_cmd
use_hold_reg
update_clk_regs_only
data_expected
card_number
transfer_mode
Altera Corporation
R/W/Flag
Block Mode
OP code
on page 14-70
Parameter
†
†
1 3 1 1
6
†
Value
1 This bit resets itself to 0 after the command is
committed.
1 or 0 Choose the value based on speed mode used.
0 Does not need to update clock parameters
1 Data command
1 For one card
0 Block transfer
17 9
on page 14-52
Comment
SD/MMC Controller
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cv_5v4
2016.10.28