Pin Description Table

Symbol

Description

Type

Comments

SA

Synchronous Address Inputs

Input

—

R/W

Synchronous Read/Write

Input

Read: Active High

Write: Active Low

BW0–BW3

Synchronous Byte Writes

Input

Active Low

x18/x36 only

NW0–NW1

Nybble Write Control Pin

Input

Active Low

x8 only

LD

Synchronous Load Pin

Input

Active Low

K

Input Clock

Input

Active High

K

Input Clock

Input

Active Low

C

Output Clock

Input

Active High

C

Output Clock

Input

Active Low

TMS

Test Mode Select

Input

—

TDI

Test Data Input

Input

—

TCK

Test Clock Input

Input

—

TDO

Test Data Output

Output

—

HSTL Input Reference Voltage

Input

—

ZQ

Output Impedance Matching Input

Input

—

MCL

Must Connect Low

—

—

DQ

Data I/O

Input/Output

Three State

Doff

Disable DLL when low

Input

Active Low

CQ

Output Echo Clock

Output

—

CQ

Output Echo Clock

Output

—

Power Supply

Supply

1.8 V Nominal

Isolated Output Buffer Supply

Supply

1.8 V or 1.5 V Nominal

Power Supply: Ground

Supply

—

NC

No Connect

—

—

GS8342T08/09/18/36BD-400/350/333/300/250

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

Rev: 1.02 6/2012

6/35

© 2011, GSI Technology

Notes:

1. NC = Not Connected to die or any other pin

unconnected.