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=== Commands Table === | |||
{| class="wikitable" | |||
|+ | |||
!CMD Index | |||
!Argument | |||
!Response | |||
!Abbreviation | |||
!Command Description | |||
|- | |||
|CMD18 | |||
|[31:0] data address | |||
|R1 | |||
|READ_MULTIPLE_BLOCK | |||
|Continuously transfers data blocks from card to host until interrupted by a STOP_TRANSMISSION command. | |||
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|- | |||
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|} | |||
=== Responses === | |||
==== R1 ==== | |||
{| class="wikitable" | |||
|+ | |||
!Bit position | |||
!47 | |||
!46 | |||
![45:40] | |||
![39:8] | |||
![7:1] | |||
!0 | |||
|- | |||
|Width (bits) | |||
|1 | |||
|1 | |||
|6 | |||
|32 | |||
|7 | |||
|1 | |||
|- | |||
|Value | |||
|'0' | |||
|'0' | |||
|x | |||
|x | |||
|x | |||
|'1' | |||
|- | |||
|Description | |||
|start bit | |||
|transmission bit | |||
|command index | |||
|card status | |||
|CRC7 | |||
|end bit | |||
|} | |||
== References == | == References == | ||
{| class="wikitable" | {| class="wikitable" | ||
Revision as of 17:04, 24 June 2020
Commands Table
| CMD Index | Argument | Response | Abbreviation | Command Description |
|---|---|---|---|---|
| CMD18 | [31:0] data address | R1 | READ_MULTIPLE_BLOCK | Continuously transfers data blocks from card to host until interrupted by a STOP_TRANSMISSION command. |
Responses
R1
| Bit position | 47 | 46 | [45:40] | [39:8] | [7:1] | 0 |
|---|---|---|---|---|---|---|
| Width (bits) | 1 | 1 | 6 | 32 | 7 | 1 |
| Value | '0' | '0' | x | x | x | '1' |
| Description | start bit | transmission bit | command index | card status | CRC7 | end bit |
References
| SD Specifications Part E1 SDIO Simplified Specification | http://academy.cba.mit.edu/classes/networking_communications/SD/SD.pdf |