idt49c460cjb Integrated Device Technology, idt49c460cjb Datasheet - Page 13

• Manufacturer Part Number: idt49c460cjb
• Description: 32-bit Cmos Error Detection And Correction Unit
• Manufacturer: Integrated Device Technology

IDT49C460/A/B/C/D/E
32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT
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.
Check Bits
Check Bits
Generated
Check Bits
Check Bits
Generated
Generated
Generated
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
Odd (XNOR)
Odd (XNOR)
Odd (XNOR)
Odd (XNOR)
Even (XOR)
Even (XOR)
Even (XOR)
Even (XOR)
Even (XOR)
Even (XOR)
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)
Parity
Parity
Parity
Parity
Table 11. 64–Bit Modified Hamming Code–Check Bit Encoding
16
32
48
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
17
33
49
X
X
X
X
X
X
X
X
X
X
X
X
X
X
1
18
34
50
X
X
X
X
X
X
X
X
X
X
X
X
X
X
2
19
35
51
X
X
X
X
X
X
X
X
X
X
X
X
X
X
3
20
36
52
X
X
X
11.6
4
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
21
37
53
X
X
X
X
X
X
X
X
X
X
X
X
X
X
5
Participating Data Bits
Participating Data Bits
Participating Data Bits
Participating Data Bits
22
38
54
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
6
MILITARY AND COMMERCIAL TEMPERATURE RANGES
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
X
X
X
X
X
8
X
X
X
X
X
X
X
X
X
25
41
57
X
X
X
X
X
X
X
X
X
X
X
X
X
X
9
26
10
42
58
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
27
11
43
59
X
X
X
X
X
X
X
X
X
X
X
X
X
X
28
12
44
60
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
29
13
45
61
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
30
14
46
62
X
X
X
X
X
X
X
X
X
X
X
X
X
X
2584 tbl 13
2584 tbl 14
2584 tbl 15
2584 tbl 16
13
31
15
47
63
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X