Multimedia Card Registers
18.5.1.9 SD_ARG Register (offset = 208h) [reset = 0h]
SD_ARG is shown in
and described in
This register contains command argument specified as bit 39-8 of Command-Format. These registers
must be initialized prior to sending the command itself to the card (write action into the register SD_CMD
register). Only exception is for a command index specifying stuff bits in arguments, making a write
unnecessary.
Figure 18-45. SD_ARG Register
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
ARG
R/W-0h
LEGEND: R/W = Read/Write; R = Read only; W1toCl = Write 1 to clear bit; -n = value after reset
Table 18-28. SD_ARG Register Field Descriptions
Bit
Field
Type
Reset
Description
31-0
ARG
R/W
0h
Command argument bits
[31:0] .
3405
SPRUH73H – October 2011 – Revised April 2013
Multimedia Card (MMC)
Copyright © 2011–2013, Texas Instruments Incorporated