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SECDED

7.4.3 Syndrome Table: Decode to Bit in Error

The syndrome is an 8-bit value that decodes to the bit in error. The bit in error can be a bit among the 64

data bits or a bit among the 8 ECC check bits. A syndrome value of 0000 0000 indicates there is no error.

Any other syndrome combinations not shown in the table are uncorrectable multi-bit error. Errors of three

of more bits may escape detection. The syndrome decoding is shown in Table 7-2.

Table 7-2. Syndrome Table

Data Bit Error Position

6 6 6 6 5 5 5 5 5 5 5 5 5 5 4 4 4 4 4 4 4 4 4 4 3 3 3 3 3 3 3 3 3 3 2 2 2

3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7

0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1

1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1

1 1 0 0 0 0 0 0 1 1 1 1 1 1 0 0 1 1 0 0 0 0 0 0 1 1 1 1 1 1 0 0 1 1 0 0 0

0 0 1 1 1 0 0 0 1 1 1 0 0 0 1 1 0 0 1 1 1 0 0 0 1 1 1 0 0 0 1 1 0 0 1 1 1

1 0 1 0 0 1 1 0 1 0 0 1 1 0 0 1 1 0 1 0 0 1 1 0 1 0 0 1 1 0 0 1 1 0 1 0 0

0 0 0 1 0 1 0 1 0 1 0 1 0 1 1 1 0 0 0 1 0 1 0 1 0 1 0 1 0 1 1 1 0 0 0 1 0

1 0 1 1 0 1 0 0 1 1 0 1 0 0 0 1 1 0 1 1 0 1 0 0 1 1 0 1 0 0 0 1 0 1 0 0 1

Data Bit Error Position ECC Error Bit

2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0

1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 Bit[7]

1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 1 0 0 0 0 0 0 Bit[6]

1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 Bit[5]

0 0 0 1 1 1 1 1 1 0 0 1 1 0 0 0 0 0 0 1 1 1 1 1 1 0 0 0 0 0 1 0 0 0 0 Bit[4]

0 0 0 1 1 1 0 0 0 1 1 0 0 1 1 1 0 0 0 1 1 1 0 0 0 1 1 0 0 0 0 1 0 0 0 Bit[3]

1 1 0 1 0 0 1 1 0 0 1 1 0 1 0 0 1 1 0 1 0 0 1 1 0 0 1 0 0 0 0 0 1 0 0 Bit[2]

1 0 1 0 1 0 1 0 1 1 1 0 0 0 1 0 1 0 1 0 1 0 1 0 1 1 1 0 0 0 0 0 0 1 0 Bit1]

0 1 1 0 0 1 0 1 1 1 0 0 1 0 0 1 0 1 1 0 0 1 0 1 1 1 0 0 0 0 0 0 0 0 1 Bit[0]

327

SPNU562–May 2014 F021 Level 2 Flash Module Controller (L2FMC)

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