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MMC/SD/SDIO Register Manual
Table 24-75. MMCHS_AC12
Address Offset
0x13C
Physical Address
0x4809 C13C
Instance
MMCHS1
0x480A D13C
MMCHS3
0x480B 413C
MMCHS2
Description
Auto CMD12 Error Status Register. The host driver may determine which of the errors cases related to Auto
CMD12 has occurred by checking this MMCi.
register when an Auto CMD12 Error interrupt
occurs.
This register is valid only when Auto CMD12 is enabled (MMCi.
[2] ACEN bit) and Auto
CMD12Error (MMCi.
[24] ACE bit) is set to 1.
Note: These bits are automatically reset when starting a new adtc command with data.
Type
R
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
CNI
ACIE
ACEB
ACCE
ACTO
ACNE
Reserved
Bits
Field Name
Description
Type
Reset
31:8
Reserved
Reserved bit field. Do not write any value.
R
0x0
7
CNI
Command not issue by Auto CMD12 error. If this bit is set to 1, it means
R
0
that pending command is not executed due to Auto CMD12 error: ACEB,
ACCE, ACTO or ACNE.
Read 0x0:
Not error
Read 0x1:
Command not issued
6:5
Reserved
Reserved bit field. Do not write any value.
R
0x0
4
ACIE
Auto CMD12 index error. This bit is a set to 1 when response index differs
R
0
from corresponding command auto CMD12 index previously emitted.
This bit depends on the command index check enable
(MMCi.
[20] CICE bit).
Read 0x0:
No error
Read 0x1:
Auto CMD12 Index Error
3
ACEB
Auto CMD12 end bit error. This bit is set to 1 when detecting a 0 at the end
R
0
bit position of auto CMD12 command response.
Read 0x0:
No error
Read 0x1:
AutoCMD12 End bit Error
2
ACCE
Auto CMD12 CRC error. This bit is automatically set to 1 when a CRC7
R
0
error is detected in the auto CMD12 command response depending on the
enable in the MMCi.
[19] CCCE bit.
Read 0x0:
No error
Read 0x1:
Auto CMD12 CRC Error
1
ACTO
Auto CMD12 timeout error. This bit is set to 1 if no response is received
R
0
within 64 clock cycles from the end bit of the auto CMD12 command.
Read 0x0:
No error
Read 0x1:
Auto CMD12 Time Out
0
ACNE
Auto CMD12 not executed. This bit is set to 1 if multiple block data transfer
R
0
command has started and if an error occurs in command before Auto
CMD12 starts.
Read 0x0:
Auto CMD12 Executed
Read 0x1:
Auto CMD12 Not Executed
Table 24-76. Register Call Summary for Register MMCHS_AC12
MMC/SD/SDIO Register Manual
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3457
SWPU177N – December 2009 – Revised November 2010
MMC/SD/SDIO Card Interface
Copyright © 2009–2010, Texas Instruments Incorporated
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