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DP8406 Datasheet(PDF) 6 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. DP8406
Description  32-Bit Parallel Error Detection and Correction Circuit
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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DP8406 Datasheet(HTML) 6 Page - National Semiconductor (TI)

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Functional Description (Continued)
TABLE V Syndrome Decoding
(Continued)
Syndrome Bits
Error
654
3
2
10
H
L
L
L
L
L
L
2-Bit
HL
L
L
L
LH
unc
HL
L
L
L
HL
unc
H
L
L
L
L
H
H
2-Bit
H
L
L
L
H
L
L
unc
H
L
L
L
H
L
H
2-Bit
H
L
L
L
H
H
L
2-Bit
H
L
L
L
H
H
H
unc
H
L
LHL
L
L
unc
H
L
L
H
L
L
H
2-Bit
H
L
L
H
L
H
L
2-Bit
H
L
LHL
H
H
DB15
H
L
L
H
H
L
L
2-Bit
H
L
L
H
H
L
H
unc
HL
L
H
H
H
L
DB14
H
L
L
H
H
H
H
2-Bit
H
L
H
L
L
L
L
unc
H
L
H
L
L
L
H
2-Bit
H
L
H
L
L
H
L
2-Bit
HLH
L
LH
H
DB13
H
L
H
L
H
L
L
2-Bit
HLH
L
H
LH
DB12
HLH
L
H
HL
DB11
H
L
H
L
H
H
H
2-Bit
H
L
H
H
L
L
L
2-Bit
HLH
H
L
L
H
DB10
HLH
H
LHL
DB9
H
L
H
H
L
H
H
2-Bit
H
L
HHH
L
L
DB8
H
L
H
H
H
L
H
2-Bit
H
L
H
H
H
H
L
2-Bit
H
L
HHH
H
H
CB5
Syndrome Bits
Error
654
3
210
H
H
L
L
L
L
L
unc
H
H
L
L
L
L
H
2-Bit
H
H
L
L
L
H
L
2-Bit
HH
L
L
L
H
H
DB23
H
H
L
L
H
L
L
2-Bit
HH
L
L
H
L
H
DB22
HH
L
L
HH
L
DB21
H
H
L
L
H
H
H
2-Bit
H
H
L
H
L
L
L
2-Bit
HH
L
H
L
L
H
DB20
HH
L
H
L
H
L
DB19
H
H
L
H
L
H
H
2-Bit
HH
L
H
H
L
L
DB18
H
H
L
H
H
L
H
2-Bit
H
H
L
H
H
H
L
2-Bit
HH
L
H
HHH
CB4
H
H
H
L
L
L
L
2-Bit
HHH
L
L
L
H
DB16
H
H
H
L
L
H
L
unc
H
H
H
L
L
H
H
2-Bit
HHH
L
H
L
L
DB17
H
H
H
L
H
L
H
2-Bit
H
H
H
L
H
H
L
2-Bit
HHH
L
HHH
CB3
H
H
H
H
L
L
L
unc (Note 1)
H
H
H
H
L
L
H
2-Bit
H
H
H
H
L
H
L
2-Bit
HHH
H
L
H
H
CB2
H
H
H
H
H
L
L
2-Bit
HHH
H
H
L
H
CB1
HHH
H
HH
L
CB0
H
H
H
H
H
H
H
None
CBX e Error in check bit X
DBY e Error in data bit Y
2-Bit e Double-bit error
unc e Uncorrectable multi-bit error
Note
2-bit and unc condition will cause both ERR and MERR to be LOW
Note 1
Syndrome bits for all LOWs MERR and ERR LOW for all LOWs
only ERR LOW for DB30 error
Note 2
Syndrome bits for all HIGHs
6


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