MAS2901FE datasheet(6/13 Pages) ZARLINK

Part #	MAS2901FE

Description	RADIATION HARD 4-BIT MICROPROCESSOR SLICE

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Manufacturer	ZARLINK [Zarlink Semiconductor Inc]

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6 / 13 page

MA2901

5

Octal

Cn=0(Low)

Cn = 1 (High)

I 5,4,3/I 2,1,0

Group

Function

Group

Function

00

01

05

06

ADD

A + Q

A + B

D + A

D + Q

ADD

plus one

A + Q +1

A + B +1

D + A +1

D + Q + 1

02

03

04

07

PASS

Q

B

A

D

Increment

Q +1

B + 1

A + 1

D + 1

12

13

14

27

Decrement

Q - 1

B - 1

A - 1

D - 1

PASS

Q

B

A

D

22

23

24

17

1s comp

- Q - 1

- B - 1

- A - 1

- D - 1

2s comp

(negate)

- Q

- B

- A

- D

10

11

15

16

20

21

25

26

SUBTRACT

(1s comp)

Q - A -1

B - A-1

A - D-1

Q - D-1

A - Q-1

A - B-1

D - A-1

D - Q-1

SUBTRACT

(2s comp)

Q - A

B - A

A - D

Q - D

A - Q

A - B

D - A

D - Q

Octal

I 5,4,3 /I 2,1,0

Group

Function

40

41

45

46

AND

A

Λ Q

A

Λ B

D

Λ A

D

Λ Q

30

31

35

36

OR

A V Q

A V B

D V A

D V Q

60

61

65

66

EX-OR

A

∇ Q

A

∇ B

D

∇ A

D

∇ Q

70

71

75

76

EX-NOR

AN

∇ QN

AN

∇ BN

DN

∇ AN

DN

∇ QN

72

73

74

77

INVERT

Q

B

A

D

62

63

64

67

PASS

Q

B

A

D

32

33

34

37

PASS

Q

B

A

D

40

43

44

47

‘ZERO’

0

50

51

55

56

AND

AN

Λ Q

AN

Λ B

DN

Λ A

DN

Λ Q

+ = plus; - = minus; V = OR; Λ = AND; ∇ = EX-OR

Figure 6: ALU Logic Mode Functions (Cn Irrelevant)

Figure 7: ALU Arithmetic Mode Functions

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