Texas Instruments TMS320DM644x Benutzerhandbuch
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4.15 MMC Response Registers (MMCRSP0-MMCRSP7)
Registers
Each command has a preset response type. When the MMC controller receives a response, it is stored in
some or all of the eight MMC response registers (MMCRSP7-MMCRSP0). The response registers are
updated as the responses arrive, even if the CPU has not read the previous contents.
some or all of the eight MMC response registers (MMCRSP7-MMCRSP0). The response registers are
updated as the responses arrive, even if the CPU has not read the previous contents.
As shown in
,
, and
each of the MMC response registers holds up
to 16 bits.
and
show the format for each type of response and which MMC response
registers are used for the bits of the response. The first byte of the response is a command index byte and
is stored in the MMC command index register (MMCCIDX).
is stored in the MMC command index register (MMCCIDX).
Figure 33. MMC Response Register 0 and 1 (MMCRSP01)
31
16
MMCRSP1
R/W-0
15
0
MMCRSP0
R/W-0
LEGEND: R/W = Read/Write; -n = value after reset
Figure 34. MMC Response Register 2 and 3 (MMCRSP23)
31
16
MMCRSP3
R/W-0
15
0
MMCRSP2
R/W-0
LEGEND: R/W = Read/Write; -n = value after reset
Figure 35. MMC Response Register 4 and 5 (MMCRSP45)
31
16
MMCRSP5
R/W-0
15
0
MMCRSP4
R/W-0
LEGEND: R/W = Read/Write; -n = value after reset
Figure 36. MMC Response Register 6 and 7 (MMCRSP67)
31
16
MMCRSP7
R/W-0
15
0
MMCRSP6
R/W-0
LEGEND: R/W = Read/Write; -n = value after reset
SPRUE30B – September 2006
Multimedia Card (MMC)/Secure Digital (SD) Card Controller
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