MAS2909CS datasheet(5/13 Pages) ETC1 | RADIATION HARD MICROPROGRAM SEQUENCER

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MAS2909CS Datasheet(PDF) 5 Page - List of Unclassifed Manufacturers

Part #	MAS2909CS

Description	RADIATION HARD MICROPROGRAM SEQUENCER

PDF	13 Pages

Scroll/Zoom	100%

Manufacturer	ETC1 [List of Unclassifed Manufacturers]

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MA2909/11

5

Execute Cycle

2909 inputs

(from µWR)

Internal

Registers

2909 Output

ROM Output

Contents of µWR

(instruction

being executed)

T0

0

H

X

X

J + 1

-

-

-

-

J + 1

I(J + 1)

I(J)

T1

0

H

X

X

J + 2

-

-

-

-

J + 2

JSR A

I(J + 1)

T2

3

L

H

A

J + 3

-

-

-

-

A

I(A)

JSR A

T3

0

H

X

X

A + 1

J + 3

-

-

-

A + 1

I(A + 1)

I(A)

T4

0

H

X

X

A + 2

J + 3

-

-

-

A + 2

RTS

I(A + 1)

T5

2

L

L

X

A + 3

J + 3

-

-

-

J + 3

I(J + 3)

RTS

T6

0

H

X

X

J + 4

-

-

-

-

J + 4

I(J + 4)

I(J + 3)

T7

0

H

X

X

J + 5

-

-

-

-

J + 5

I(J + 5)

I(J + 4)

T8

T9

S1, S0

FE

PUP

D

µPC

STK0

STK1

STK2

STK3

Y

(Y)

µWR

Table 3: Subroutine Execution

Execute

Cycle

T0

T1

T2

T6

T7

T3

T4

T5

Address

J - 1

J

J + 1

J + 2

J + 3

J + 4

-

-

-

-

-

A

A + 1

A + 2

-

-

-

-

-

-

CONTROL MEMORY

Microprogram

Sequencer

Instruction

-

-

-

JSR A

-

-

-

-

-

-

-

I(A)

-

RTS

-

-

-

-

-

-

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