IDT49C460 データシートの表示（PDF） - Integrated Device Technology
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IDT49C460 Datasheet PDF : 32 Pages
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IDT49C460/A/B/C/D/E
32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT
MILITARY AND COMMERCIAL TEMPERATURE RANGES
Generated
Check Bits
C0
C1
C2
C3
C4
C5
C6
C7
Parity
Even (XOR)
Even (XOR)
Odd (XNOR)
Odd (XNOR)
Even (XOR)
Even (XOR)
Even (XOR)
Even (XOR)
Participating Data Bits
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
XXX
X
XX
X
X
XXX
X
X
X
X
X
X
XX
X
XX
X
X
XX
XXX
X XX
X X XX X X
XX
XX X X XX X X
X X X X XX X X
X X X X XX X X
2584 tbl 13
Generated
Check Bits
C0
C1
C2
C3
C4
C5
C6
C7
Parity
Even (XOR)
Even (XOR)
Odd (XNOR)
Odd (XNOR)
Even (XOR)
Even (XOR)
Even (XOR)
Even (XOR)
Participating Data Bits
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
XXX
X
XX
X
X
XXX
X
X
X
X
X
X
XX
X
XX
X
X
XX
XXX
X XX
X X XX X X
XX
XX X X XX X X
XX X X XX X X
XX X X XX X X
2584 tbl 14
Generated
Check Bits
C0
C1
C2
C3
C4
C5
C6
C7
Parity
Even (XOR)
Even (XOR)
Odd (XNOR)
Odd (XNOR)
Even (XOR)
Even (XOR)
Even (XOR)
Even (XOR)
Participating Data Bits
32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47
X
X
XX
X
XX
X
XXX
X
X
X
X
X
X
XX
X
XX
X
X
XX
XXX
X XX
X X XX X X
XX
XX X X XX X X
X X X X XX X X
XX X X XX X X
2584 tbl 15
Generated
Check Bits
Parity
Participating Data Bits
48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63
C0
Even (XOR)
X
X
XX
X
XX
X
C1
Even (XOR)
XXX
X
X
X
X
X
C2
Odd (XNOR)
X
XX
X
XX
X
X
C3
Odd (XNOR)
XX
XXX
X XX
C4
Even (XOR)
X X XX X X
XX
C5
Even (XOR)
XX X X XX X X
C6
Even (XOR)
XX X X XX X X
C7
Even (XOR)
X X X X XX X X
NOTE:
1. The check bit is generated as either an XOR or XNOR of the 32 data bits noted by an “X” in the table.
2584 tbl 16
Table 11. 64–Bit Modified Hamming Code–Check Bit Encoding
11.6
13
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