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Multimedia Card Registers
18.5.1.9 SD_ARG Register (offset = 208h) [reset = 0h]
SD_ARG is shown in Figure 18-45 and described in Table 18-28.
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)
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