2-98

AS4LC1M16

Austin Semiconductor, Inc., reserves the right to change products or specifications without notice.

REV. 3/97

DS000020

AS4LC1M16 883C

1 MEG x 16 DRAM

PRELIMINARY

AUSTIN SEMICONDUCTOR, INC.

TRUTH TABLE

ADDRESSES

FUNCTION

?R?A/S

?C?A/S/L ?C?A/S/H

?W/E

?O/E

DQs

NOTES

Standby

H

H

>XH>X

X

X

X

X

High-Z

READ: WORD

L

L

L

H

L

ROW

COL

Data-Out

READ: LOWER BYTE

L

L

H

H

L

ROW

COL

Lower Byte,

Upper Byte, Data-Out

READ: UPPER BYTE

L

H

L

H

L

ROW

COL

Lower Byte, Data-Out

Upper Byte

WRITE: WORD

L

L

L

L

X

ROW

COL

Data-In

(EARLY WRITE)

WRITE: LOWER

L

L

H

L

X

ROW

COL

Lower Byte, Data-In

BYTE (EARLY)

Upper Byte, High-Z

WRITE: UPPER

L

H

L

L

X

ROW

COL

Lower Byte, High-Z

BYTE (EARLY)

Upper Byte, Data-In

READ WRITE

L

L

L

H

>LL>H ROW COL

Data-Out, Data-In

1, 2

EDO-PAGE-MODE

1st Cycle

L

H

>LH>L

H

L

ROW

COL

Data-Out

2

READ

2nd Cycle

L

H

>LH>L

H

L

n/a

COL

Data-Out

2

Any Cycle

L

L

>HL>H

H

L

n/a

n/a

Data-Out

2

EDO-PAGE-MODE

1st Cycle

L

H

>LH>L

L

X

ROW

COL

Data-In

1

WRITE

2nd Cycle

L

H

>LH>L

L

X

n/a

COL

Data-In

1

EDO-PAGE-MODE

1st Cycle

L

H

>LH>LH>LL>H ROW COL

Data-Out, Data-In

1, 2

READ-WRITE

2nd Cycle

L

H

>LH>LH>LL>H

n/a

COL

Data-Out, Data-In

1, 2

HIDDEN

READ

L

>H>L

L

L

H

L

ROW

COL

Data-Out

2

REFRESH

WRITE

L

>H>L

L

L

L

X

ROW

COL

Data-In

1, 3

?R?A/S-ONLY REFRESH

L

H

H

X

X

ROW

n/a

High-Z

CBR REFRESH

H

>L

L

L

H

X

X

X

High-Z

4

NOTE:

1. These WRITE cycles may also be BYTE WRITE cycles (either

?C?A/S/L or ?C?A/S/H active).

2. These READ cycles may also be BYTE READ cycles (either

?C?A/S/L or ?C?A/S/H active).

3. EARLY WRITE only.

4. Only one

?C?A/S must be active (?C?A/S/L or ?C?A/S/H).