Aeroflex Circuit Technology

SCD3369-1 REV C 5/31/00 Plainview NY (516) 694-6700

7

Command

‡

State of Bank(s)

DQML

DQMU

§

(n)

Data In (n)

Data Out

(n+2)

Mnemonic

—

T = deac and

B = deac

X

N/A

Hi-Z

—

—

T = actv and

B = actv

(no access operation)

¶

X

N/A

Hi-Z

—

Data-in enable

T = Write or

B = Write

L

V

N/A

ENBL

Data-in mask

T = Write or

B = Write

H

M

N/A

MASK

Data-out enable

T = Write or

B = Write

L

N/A

V

ENBL

NOTES:

† For execution of these commands on cycle n:

- CKE (n) must be high, or

-t CES and n CLE must be satisfied for clock suspend exit.

CS(n), RAS(n), CAS(n), WE(n), and A0-A11 are don’t cares.

‡ All other unlisted commands are considered vendor-reserved commands or illegal commands.

§ DQML controlsDQ0-7, DQ16-23, DQ32-39, DQ48-55, DQ64-71, DQ80-87 and DQMU controls DQ8-15, DQ24-31, DQ40-47, DQ56-63, DQ72-79, and DQ88-95

.

¶ A bank is no longer in an access operation one cycle after the last data-out cycle of a read operation, and two cycles after the last data-in cycle

of a write operation. Neither the PDE nor the HOLD command is allowed on the cycle immediately following the last data-in cycle of a write operation.

Legend:

n = CLK cycle number, L = Logic low, H = Logic high, X = Don’t care, either logic low or logic high, V = Valid, M = Masked input data, N/A = Not applicable,

T = Bank T, B = Bank B, actv = Activated, deac = Deactivated, write = Activated and accepting data inputs on cycle n, read = Activated and delivering data outputs on cycle (n + 2)

Table 4 — Serial 4-Word Burst Sequences

INTERNAL COLUMN ADDRESS A1-A0, BA1-BA0

DECIMAL

BINARY

START

2ND

3RD

4TH

START

2ND

3RD

4TH

0

1

2

3

00

01

10

11

1

2

3

0

01

10

11

00

2

3

0

1

10

11

00

01

3

0

1

2

11

00

01

10

Table 5 – Serial 8-Word Burst Sequences

INTERNAL COLUMN ADDRESS A2-A0, BA2-BA0

DECIMAL

BINARY

START

2ND

3RD

4TH

5TH

6TH

7TH

8TH

START

2ND

3RD

4TH

5TH

6TH

7TH

8TH

0

1

2

3

4

5

6

7

000

001

010

011

100

101

110

111

1

2

3

4

5

6

7

0

001

010

011

100

101

110

111

000

2

3

4

5

6

7

0

1

010

011

100

101

110

111

000

001

3

4

5

6

7

0

1

2

011

100

101

110

111

000

001

010

4

5

6

7

0

1

2

3

100

101

110

111

000

001

010

011

5

6

7

0

1

2

3

4

101

110

111

000

001

010

011

100

6

7

0

1

2

3

4

5

110

111

000

001

010

011

100

101

7

0

1

2

3

4

5

6

111

000

001

010

011

100

101

110