|
Task |
SD{0, 1} |
Register Field |
Register Offset |
Bits |
Value |
|---|---|---|---|---|---|
|
Check the present state register to make sure the card is present. |
reg_presentstate |
sdhccarddet_inserted_dsync |
0x24 |
16 |
Read |
|
74 clock delay after card is powered up, before the first command. |
|||||
|
Send CMD0 to card with no response expected (see Table: SD CMD Transfer). |
|||||
|
Send CMD1 while card is still busy with power up (perform the following two steps). |
|||||
|
Send command (CMD1) with options to host high-capacity support and high-voltage window (see Table: SD CMD Transfer). |
|||||
|
Read response 0. |
reg_response0 |
command_response |
0x10 |
15:0 |
Read |
|
Send CMD2 for CARD ID (see Table: SD CMD Transfer). |
|||||
|
Send CMD3. Save relative card address in response 0. |
|||||
|
Read card specific data in response. |
reg_response0 |
command_response |
0x10 |
15:0 |
Read |
|
Read card specific data in response. |
reg_response1 |
command_response |
0x12 |
15:0 |
Read |
|
Read card specific data in response. |
reg_response2 |
command_response |
0x14 |
15:0 |
Read |
|
Read card specific data in response. |
reg_response3 |
command_response |
0x16 |
15:0 |
Read |
|
Send CMD9 with relative card address saved in CMD3 response. |
|||||
|
Read card specific data in response. |
reg_response0 |
command_response |
0x10 |
15:0 |
Read |
|
Read card specific data in response. |
reg_response1 |
command_response |
0x12 |
15:0 |
Read |
|
Read card specific data in response. |
reg_response2 |
command_response |
0x14 |
15:0 |
Read |
|
Read card specific data in response. |
reg_response3 |
command_response |
0x16 |
15:0 |
Read |