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MMC/SD/SDIO Register Manual
Bits
Field Name
Description
Type
Reset
31:0
CSRE
Card status response error
RW
0x00000000
Table 24-40. Register Call Summary for Register MMCHS_CSRE
MMC/SD/SDIO Register Manual
•
•
:
Table 24-41. MMCHS_SYSTEST
Address Offset
0x028
Physical Address
0x4809 C028
Instance
MMCHS1
0x480A D028
MMCHS3
0x480B 4028
MMCHS2
Description
System Test register
This register is used to control the signals that connect to I/O pins when the module is configured in system
test (SYSTEST) mode for boundary connectivity verification.
Note: In SYSTEST mode, a write into MMCi.
register will not start a transfer. The buffer
behaves as a stack accessible only by the local host (push and pop operations). In this mode, the Transfer
Block Size (MMCi.
[10:0] BLEN bits) and the Blocks count for current transfer
[31:16] NBLK bits) are needed to generate a Buffer write ready interrupt
[4] BWR bit) or a Buffer read ready interrupt (MMCi.
[5] BRR bit) and
DMA requests if enabled.
Type
RW
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
Reserved
OBI
SSB
D7D
D6D
D5D
D4D
D3D
D2D
D1D
D0D
DDIR
CDIR
CDAT
SDCD
MCKD
SDWP
WAKD
Bits
Field Name
Description
Type
Reset
31:17
Reserved
Reserved bit field. Do not write any value. Reads return 0.
R
0x00000
16
OBI
Out-Of-Band Interrupt (OBI) data value.
RW
0
0x0:
The Out-of-Band Interrupt pin is driven low.
0x1:
The Out-of-Band Interrupt pin is driven high.
15
SDCD
Card detect input signal (SDCD) data value
R
0
0x0:
The card detect pin is driven low.
0x1:
The card detect pin is driven high.
14
SDWP
Write protect input signal (SDWP) data value.
R
0
0x0:
The write protect pin SDWP is driven low.
0x1:
The write protect pin SDWP is driven high.
13
WAKD
Wake request output signal data value.
RW
0
Read 0x0:
No action. Returns 0.
Write 0x0:
The pin SWAKEUP is driven low.
Read 0x1:
No action. Returns 1.
Write 0x1:
The pin SWAKEUP is driven high.
12
SSB
Set status bit
RW
0
This bit must be cleared prior attempting to clear a status bit of the
interrupt status register (MMCi.
Read 0x0:
No action. Returns 0.
Write 0x0:
Clear this SSB bit field. Writing 0 does not clear already
set status bits.
Read 0x1:
No action. Returns 1.
3427
SWPU177N – December 2009 – Revised November 2010
MMC/SD/SDIO Card Interface
Copyright © 2009–2010, Texas Instruments Incorporated