Texas Instruments AM335 Series

1
0
mmc_dat3
...
b7
b3
b7
b3
LSB MSB
CRC
1
0
...
b6
b2
b6
b2
CRC
1
0
...
b5
b1
b5
b1
CRC
1
0
...
b4
b0
b4
b0
CRC
Block length *2
mmc_dat2
mmc_dat1
mmc_dat0
0
1
mmc_dat0
... ... ...
LSB MSB
Block data
CRC
Block length *8
b7
b6
b1
b0
b7
b6
b1
b0
0
... ...
b7
b6
b1
b0
...
LSB MSB
Sequential data
b7
b6
b1
b0
1
mmc_dat0
Functional Description www.ti.com
Coding Scheme for Data Token
Data tokens always start with 0 and end with 1 (see Figure 18-13, Figure 18-14, Figure 18-15, and
Figure 18-16).
Figure 18-13. Data Packet for Sequential Transfer (1-Bit)
Figure 18-14. Data Packet for Block Transfer (1-Bit)
Figure 18-15. Data Packet for Block Transfer (4-Bit)
3356
Multimedia Card (MMC) SPRUH73H–October 2011–Revised April 2013
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