Texas Instruments AM335 Series Technical Reference Manual

bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8
1
st
row
2nd
t
row
3rd row
4th row
253th row
254
th t
row
255
th
row
256
th
row
P1o P1e P1o P1e P1o P1e P1o P1e
P2o P2e P2o P2e
P4o P4e
P16e
P16o
P16e
P16o
P32e
P32o
P32e
P32o
P2048e
P2048o
512 Bytes input
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
P1o P1e P1o P1e P1o P1e P1o P1e
P2o P2e P2o P2e
P4o P4e
bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8
bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8
bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8
bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8
bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8
bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8
bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8
P8o P8e
P16e
P16o
P16e
P16o
bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8
1st row
2nd row
3rd row
4th row
253th row
254th row
255th row
256th row
P1o P1o P1o P1o
P2o P2o
P4o
P16o
P16o
P32o
P32o
P2048o
51-bytes input
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
P1o P1o P1o P1o
P2o P2o
P4o
bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8
bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8
bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8
bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8
bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8
bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8
bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8
P8o
P16o
P16o
bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8
1
st
row
2nd
t
row
3rd row
4th row
123th row
124
th t
row
125
th
row
128
th
row
P1o P1e P1o P1e P1o P1e P1o P1e
P2o P2e P2o P2e
P4o P4e
P16e
P16o
P16e
P16o
P32e
P32o
P32e
P32o
P1024e
P1024o
256 Bytes input
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
P1o P1e P1o P1e P1o P1e P1o P1e
P2o P2e P2o P2e
P4o P4e
bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8
bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8
bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8
bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8
bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8
bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8
bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8
P8o P8e
P16e
P16o
P16e
P16o
bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8
1st row
2nd row
3rd row
4th row
123th row
124th row
125th row
128th row
P1o P1o P1o P1o
P2o P2o
P4o
P16o
P16o
P32o
P32o
P1024o
256 byte input
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
P1o P1o P1o P1o
P2o P2o
P4o
bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8
bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8
bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8
bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8
bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8
bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8
bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8
P8o
P16o
P16o
GPMC www.ti.com
7.1.3.3.12.3.1.6 ECC Calculation Based on 16-Bit Word
ECC computation based on a 16-bit word is used for 16-bit wide NAND device interfacing. This ECC
computation is not supported when interfacing an 8-bit wide NAND device, and the
GPMC_ECC_CONFIG[7] ECC16B bit must be cleared to 0 when interfacing an 8-bit wide NAND device.
The parity computation based on 16-bit words affects the row and column parity mapping. The main
difference is that the odd and even parity bits P8o and P8e are computed on rows for an 8-bit based ECC
while there are computed on columns for a 16-bit based ECC. Figure 7-35 and Figure 7-36.
Figure 7-35. 128 Word16 ECC Computation
Figure 7-36. 256 Word16 ECC Computation
314
Memory Subsystem SPRUH73H–October 2011–Revised April 2013
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Texas Instruments AM335 Series Specifications

General

Brand	Texas Instruments
Model	AM335 Series
Category	Computer Hardware
Language	English