Aritmeetika-loogika seade

Слайд 2

* T. Evartson Alu struktuur AOP0 A B AOP1 AOPj-1 LOP0

*

T. Evartson

Alu struktuur

AOP0

A

B

AOP1

AOPj-1

LOP0

LOP1

LOPj-1

Y

M Sn-1... S1 S0

M Sn-1... S1 S0

M

Sn-1... S1 S0

M Sn-1... S1 S0

M Sn-1... S1 S0

M Sn-1... S1 S0

Aritmeetika

Loogika

Слайд 3

* T. Evartson DC A B 0 1 2 3 &

*

T. Evartson

DC

A

B

0

1

2

3

&

&

&

&

1

S

M

&

&

&

&

1

y0

+

+

a0

b0

&

+

a1

b1

M S

M S

M S

M S

0

&

&

1

1

y1

s´0

s´1

n0

n1

k0

k1

e0

e1

ALU näide I

M = 0
S =

0 Y = A + B
S = 1 Y = R1 (A)
M = 1
S = 0 Y = A B
S = 1 Y = B

V

Слайд 4

Multiplexer SN74S153 * T. Evartson 0 1 Sel 0 Sel 1

Multiplexer SN74S153

*

T. Evartson

0

1

Sel 0

Sel 1

MUX

EN

0

1

2

3

1G

1C0

1C1

1C2

1C3

EN

0

1

2

3

2C0

2C1

2C2

2C3

2G

Select
input

Strobe

G

Output

Y

x

x

H

L

L

L

L

L

L

L

L

L

H

H

H

H

C0

C1

C2

C3

1Y

2Y

Sel 0

Sel 1

Слайд 5

Multiplrxer SN74LS353 * T. Evartson 0 1 MUX EN 0 1

Multiplrxer SN74LS353

*

T. Evartson

0

1

MUX

EN

0

1

2

3

1G

1C0

1C1

1C2

1C3

EN

0

1

2

3

2C0

2C1

2C2

2C3

2G

Select
input

Strobe

G

Output

Y

x

x

H

H

L

L

L

L

L

L

L

L

H

H

H

H

C0

C1

C2

C3

1Y

2Y

Sel 0

Sel 1

Sel 0

Sel 1

Слайд 6

* T. Evartson + + a0 b0 & + a1 b1

*

T. Evartson

+

+

a0

b0

&

+

a1

b1

0

&

&

1

1

s´0

s´1

n0

n1

k0

k1

e0

e1

M = 0
S = 0 Y = A + B
S

= 1 Y = R1 (A)
M = 1
S = 0 Y = A B
S = 1 Y = B

V

0

1

MUX

EN

0

1

2

3

EN

0

1

2

3

y0

y1

M

S

SN74S153

0

ALU näide II

Слайд 7

* T. Evartson

*

T. Evartson