Ecc Data Mapping For 4Kb Page And 16B Bch Encoding - Texas Instruments TMS320C6A816 Series Technical Reference Manual

Memory Booting
Figure 21-16. ECC Data Mapping for 4KB Page and 16b BCH Encoding
21.7.4 SD Cards
21.7.4.1 Overview
The ROM code supports booting from SD cards in the following conditions:
• SD Cards compliant to low and high capacities.
• SD cards connected to MMC interface #1.
• 3V VCC power supply, support for 3V I/O voltages.
• Clock Frequency: identification mode: 400 KHz; data transfer mode up to 10 MHz.
2012
ROM Code Memory and Peripheral Booting
Preliminary
x8
Byte
0
ECC-A[0]
1
...
ECC-A[25]
26
ECC-B[0]
27
...
ECC-B[25]
52
ECC-C[0]
53
...
ECC-C[25]
78
ECC-D[0]
79
...
ECC-D[25]
104
ECC-E[0]
105
...
ECC-E[25]
130
ECC-F[0]
131
...
ECC-F[25]
156
ECC-G[0]
157
...
ECC-G[25]
182
ECC-H[0]
183
...
ECC-H[25]
208
© 2011, Texas Instruments Incorporated
x16
Word
MSB LSB
0
ECC-A[1] ECC-A[0]
1
... ...
ECC-A[25] ECC-A[24]
13
ECC-B[1] ECC-B[0]
14
... ...
ECC-B[25] ECC-B[24]
26
ECC-C[1] ECC-C[0]
27
... ...
ECC-C[25] ECC-C[24]
39
ECC-H[1] ECC-H[0]
92
... ...
ECC-H[25] ECC-H[24]
104
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SPRUGX9 – 15 April 2011
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