IDT49C466APQF IDT, Integrated Device Technology Inc, IDT49C466APQF Datasheet - Page 6

• Manufacturer Part Number: IDT49C466APQF
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of IDT49C466APQF

• Lead Free Status / Rohs Status: Not Compliant

DETAILED DESCRIPTION —
64-BIT MODIFIED HAMMING CODE - CHECKBIT ENCODING CHART
NOTES:
1. The table indicates the data bits participating in the checkbit generation. For example, checkbit CB0 is the Exclusive-OR function of the 64 data input
2. The checkbit is generated as either an XOR or an XNOR of the 64 data bits noted by an “X” in the table.
IDT49C466, IDT49C466A
64-BIT FLOW-THRU ERROR DETECTION AND CORRECTION UNIT
bits marked with an "X".
Generated
Checkbits
Generated
Checkbits
Generated
Checkbits
Generated
Checkbits
CB0
CB1
CB2
CB3
CB4
CB5
CB6
CB7
CB0
CB1
CB2
CB3
CB4
CB5
CB6
CB7
CB0
CB1
CB2
CB3
CB4
CB5
CB6
CB7
CB0
CB1
CB2
CB3
CB4
CB5
CB6
CB7
Odd (XNOR)
Odd (XNOR)
Odd (XNOR)
Odd (XNOR)
Odd (XNOR)
Odd (XNOR)
Odd (XNOR)
Odd (XNOR)
Even (XOR)
Even (XOR)
Even (XOR)
Even (XOR)
Even (XOR)
Even (XOR)
Even (XOR)
Even (XOR)
Even (XOR)
Even (XOR)
Even (XOR)
Even (XOR)
Even (XOR)
Even (XOR)
Even (XOR)
Even (XOR)
Even (XOR)
Even (XOR)
Even (XOR)
Even (XOR)
Even (XOR)
Even (XOR)
Even (XOR)
Even (XOR)
Parity
Parity
Parity
Parity
16
32
48
0
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
17
33
49
X
X
X
X
X
X
X
X
X
X
X
X
X
X
1
18
34
50
2
X
X
X
X
X
X
X
X
X
X
X
X
X
X
19
35
51
X
X
X
X
3
X
X
X
X
X
X
X
X
X
X
20
36
52
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
4
(1, 2)
6
21
37
53
5
X
X
X
X
X
X
X
X
X
X
X
X
X
X
22
38
54
Participating Data Bits
X
X
X
X
X
Participating Data Bits
X
X
X
Participating Data Bits
X
X
X
X
X
Participating Data Bits
X
X
X
X
X
6
23
39
55
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
7
24
40
56
8
X
X
X
X
X
X
X
X
X
X
X
X
X
X
COMMERCIAL TEMPERATURE RANGE
25
41
57
X
X
X
X
X
X
X
X
X
X
X
X
X
X
9
10
26
42
58
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
11
27
43
59
X
X
X
X
X
X
X
X
X
X
X
X
X
X
12
28
44
60
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
13
29
45
61
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
14
30
46
62
X
X
X
X
X
X
X
X
X
X
X
X
X
X
15
31
47
63
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X