ECC-A[0]
...
ECC-A[25]
0
1
26
27
ECC-B[0]
...
ECC-B[25]
ECC-C[0]
...
ECC-C[25]
ECC-D[0]
...
ECC-D[25]
52
53
78
79
104
ECC-A[1]
ECC-A[0]
...
0
1
...
ECC-A[24]
ECC-A[25]
ECC-B[0]
ECC-B[1]
...
...
ECC-B[24]
ECC-B[25]
13
14
26
Byte
Word
MSB
LSB
x8
x16
ECC-H[0]
ECC-H[1]
...
...
ECC-H[24]
ECC-H[25]
92
104
ECC-E[0]
...
ECC-E[25]
105
130
131
ECC-F[0]
...
ECC-F[25]
ECC-G[0]
...
ECC-G[25]
ECC-H[0]
...
ECC-H[25]
156
157
182
183
208
ECC-C[0]
ECC-C[1]
...
...
ECC-C[24]
ECC-C[25]
27
39
Preliminary
Memory Booting
www.ti.com
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
SPRUGX9 – 15 April 2011
© 2011, Texas Instruments Incorporated