5

IS66/67WVE2M16EALL/BLL/CLL

Rev. 0D | November 2014

www.issi.com - SRAM@issi.com

Functional Description

All functions for the device are listed below in Table 2.

Mode

Power

CE#

WE#

OE#

UB#/LB#

ZZ#

DQ

Note

Standby

Standby

H

X

X

X

H

High-Z

2,5

Read

Active

L

H

L

L

H

Data-Out

1,4

Write

Active

L

L

X

L

H

Data-In

1,3,4

No operation

Idle

L

X

X

X

H

X

4,5

PAR

PAR

H

X

X

X

L

High-Z

6

DPD

DPD

H

X

X

X

L

High-Z

6

Load

Configuration

register

Active

L

L

X

X

L

High-Z

Table 2. Functional Descriptions

Notes

1. When UB# and LB# are in select mode (LOW), DQ0~DQ15 are affected as shown.

When only LB# is in select mode, DQ0~DQ7 are affected as shown. When only UB# is

in select mode, DQ8~DQ15 are affected as shown.

2. When the device is in standby mode, control inputs (WE#, OE#), address inputs, and data

inputs/outputs are internally isolated from any external influence.

3. When WE# is active, the OE# input is internally disabled and has no effect on the I/Os.

4. The device will consume active power in this mode whenever addresses are changed.

5. Vin=VDDQ or 0V, all device pins be static (unswitched) in order to achieve standby current.

6. DPD is enabled when configuration register bit CR[4] is “0”; otherwise, PAR is enabled.