11.6

13

IDT49C460/A/B/C/D/E

32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT

MILITARY AND COMMERCIAL TEMPERATURE RANGES

Generated

Participating Data Bits

Check Bits

Parity

0123456

789

10

11

12

13

14

15

Even (XOR)

X

X

X

X

X

X

X

X

Even (XOR)

X

X

X

X

X

X

X

X

Odd (XNOR)

X

X

X

X

X

X

X

X

Odd (XNOR)

X

X

X

X

X

X

X

X

Even (XOR)

X

X

X

X

X

X

X

X

Even (XOR)

X

X

X

X

X

X

X

X

Even (XOR)

XXXX

X

XXX

Even (XOR)

XXXX

X

XXX

2584 tbl 13

Generated

Participating Data Bits

Check Bits

Parity

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Even (XOR)

X

X

X

X

X

X

X

X

Even (XOR)

X

X

X

X

X

X

X

X

Odd (XNOR)

X

X

X

X

X

X

X

X

Odd (XNOR)

X

X

X

X

X

X

X

X

Even (XOR)

X

X

X

X

X

X

X

X

Even (XOR)

X

X

X

X

X

X

X

X

Even (XOR)

X

X

X

X

X

X

X

X

Even (XOR)

X

X

X

X

X

X

X

X

2584 tbl 14

Generated

Participating Data Bits

Check Bits

Parity

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

Even (XOR)

X

X

X

X

X

X

X

X

Even (XOR)

X

X

X

X

X

X

X

X

Odd (XNOR)

X

X

X

X

X

X

X

X

Odd (XNOR)

X

X

X

X

X

X

X

X

Even (XOR)

X

X

X

X

X

X

X

X

Even (XOR)

X

X

X

X

X

X

X

X

Even (XOR)

XXXX

X

XXX

Even (XOR)

X

X

X

X

X

X

X

X

2584 tbl 15

Generated

Participating Data Bits

Check Bits

Parity

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

Even (XOR)

X

X

X

X

X

X

X

X

Even (XOR)

X

X

X

X

X

X

X

X

Odd (XNOR)

X

X

X

X

X

X

X

X

Odd (XNOR)

X

X

X

X

X

X

X

X

Even (XOR)

X

X

X

X

X

X

X

X

Even (XOR)

X

X

X

X

X

X

X

X

Even (XOR)

X

X

X

X

X

X

X

X

Even (XOR)

XXXX

X

XXX

NOTE:

2584 tbl 16

1. The check bit is generated as either an XOR or XNOR of the 32 data bits noted by an “X” in the table.

Table 11. 64–Bit Modified Hamming Code–Check Bit Encoding