Mode Pin Functions

Mode Name

Pin Name

State

Function

Burst Order Control

LBO

L

Linear Burst

H

Interleaved Burst

Power Down Control

ZZ

L or NC

Active

H

Single/Dual Cycle Deselect Control

SCD

L

Dual Cycle Deselect

H or NC

Single Cycle Deselect

FLXDrive Output Impedance Control

ZQ

L

High Drive (Low Impedance)

H or NC

Low Drive (High Impedance)

GS88237BB/D-xxxV

Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.

Rev: 1.04 6/2006

6/28

© 2003, GSI Technology

Note:

There are pull-up devices on the ZQ and SCD pins and a pull-down device on the ZZ pin, so those input pins can be unconnected and the chip

will operate in the default states as specified in the above tables.

Note:

The burst counter wraps to initial state on the 5th clock.

Note:

The burst counter wraps to initial state on the 5th clock.

Linear Burst Sequence

A[1:0] A[1:0] A[1:0] A[1:0]

1st address

00

01

10

11

2nd address

01

10

11

00

3rd address

10

11

00

01

4th address

11

00

01

10

Interleaved Burst Sequence

A[1:0] A[1:0] A[1:0] A[1:0]

1st address

00

01

10

11

2nd address

01

00

11

10

3rd address

10

11

00

01

4th address

11

10

01

00

Burst Counter Sequences

BPR 1999.05.18