MCBSTM32EXL Keil, MCBSTM32EXL Datasheet - Page 465

• Manufacturer Part Number: MCBSTM32EXL
• Description: BOARD EVALUATION FOR STM32F103ZE
• Manufacturer: Keil

Specifications of MCBSTM32EXL

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

RM0008
Table 122. Short response format
Table 123. Long response format
The command register contains the command index (six bits sent to a card) and the
command type. These determine whether the command requires a response, and whether
the response is 48 or 136 bits long (see
implements the status flags shown in
Table 124. Command path status flags
The CRC generator calculates the CRC checksum for all bits before the CRC code. This
includes the start bit, transmitter bit, command index, and command argument (or card
status). The CRC checksum is calculated for the first 120 bits of CID or CSD for the long
response format. Note that the start bit, transmitter bit and the six reserved bits are not used
in the CRC calculation.
The CRC checksum is a 7-bit value:
47
46
[45:40]
[39:8]
[7:1]
0
135
134
[133:128]
[127:1]
0
Flag
CMDREND
CCRCFAIL
CMDSENT
CTIMEOUT
CMDACT
G(x) = x
M(x) = (start bit) * x
M(x) = (start bit) * x
CRC[6:0] = Remainder [(M(x) * x
Bit position
Bit position
7
+ x
3
Description
Set if response CRC is OK.
Set if response CRC fails.
Set when command (that does not require response) is sent
Response timeout.
Command transfer in progress.
+ 1
1
1
6
32
7
1
1
1
6
127
1
39
119
+ ... + (last bit before CRC) * x
+ ... + (last bit before CRC) * x
Width
Width
Doc ID 13902 Rev 9
Table
7
) / G(x)]
0
0
111111
-
1
Section 20.9.4 on page
0
0
-
-
-
1
124:
Secure digital input/output interface (SDIO)
Value
Value
Start bit
Transmission bit
Reserved
CID or CSD (including internal CRC7)
End bit
0
, or
0
Start bit
Transmission bit
Command index
Argument
CRC7(or 1111111)
End bit
499). The command path
Description
Description
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