Preliminary
Registers
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9.4.5 System Status Register (SD_SYSSTATUS)
This register provides status information about the module excluding the interrupt status information.
The system status register (SD_SYSSTATUS) is shown in
and described in
.
Figure 9-33. System Status Register (SD_SYSSTATUS)
31
1
0
Reserved
RESETDONE
R-0
R-0
LEGENDR/W = Read/Write; R = Read only; -n = value after reset
Table 9-15. System Status Register (SD_SYSSTATUS) Field Descriptions
Bit
Field
Value
Description
31-1
Reserved
0
Reserved bit field. Do not write any value.
0
RESETDONE
Internal Reset Monitoring. Notethe debounce clock , the interface clock and the functional
clock shall be provided to the SD/SDIO host controller to allow the internal reset monitoring.
Read 0
Internal module reset is on-going
Read 1
Reset completed
9.4.6 Card Status Response Error (SD_CSRE)
This register enables the host controller to detect card status errors of response type R1, R1b for all
cards and of R5, R5b and R6 response for cards types SD or SDIO. When a bit SD_CSRE[i] is set to 1,
if the corresponding bit at the same position in the response SD_RSP10[I] is set to 1, the host controller
indicates a card error (SD_STAT[28] CERR bit) interrupt status to avoid the host driver reading the
response register (SD_RSP10).
NOTE:
No automatic card error detection for autoCMD12 is implemented; the host system has
to check autoCMD12 response register (SD_RSP76) for possible card errors.
The card status response error (SD_CSRE) is shown in
and described in
.
Figure 9-34. Card Status Response Error (SD_CSRE)
31
0
CSRE
R/W-0
LEGENDR/W = Read/Write; R = Read only; -n = value after reset
Table 9-16. Card Status Response Error (SD_CSRE) Field Descriptions
Bit
Field
Value
Description
31-0
CSRE
Card status response error
966
Secure Digital (SD)/—Secure Digital I/O (SDIO) Card Interface
SPRUGX9 – 15 April 2011
© 2011, Texas Instruments Incorporated
Содержание TMS320C6A816 Series
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