Integrated Silicon Solution, Inc. — 1-800-379-4774

Rev. D

11/01/05

27

ISSI

IS42S83200A

(4-bank x 8,388,608 - word x 8-bit)

IS42S16160A

(4-bank x 4,194,304 - word x 16-bit)

CLK SUSPEND

CKE controls the internal CLK at the following cycle.

Figure below shows how CKE works. By negating CKE,

the next internal CLK is suspended. The purpose of

CLK suspend is power down, output suspend or input

suspend. CKE is a synchronous input except during

the self-refresh mode. CLK suspend can be performed

either when the banks are active or idle. A command

at the suspended cycle is ignored.

ext.CLK

CKE

int.CLK

tIH

tIS

tIH

tIS

Power Down by CKE

CLK

CKE

Command

CKE

Command

DQ Suspend by CKE

CLK

Standby Power Down

Active Power Down

PRE

NOP

NOP

NOP

NOP

NOP

NOP

ACT

Write

Read

D0

D1

D2

D3

Q0

Q1

Q2

Q3

CKE

Command

DQ