IS34C02B-2DLI datasheet(7/18 Pages) ISSI

Part #	IS34C02B-2DLI

Description	2K-bit 2-WIRE SERIAL CMOS EEPROM with Permanent and Reversible Write-Protection

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Manufacturer	ISSI [Integrated Silicon Solution, Inc]

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

7

ADVANCED INFORMATION

Rev.00D

03/21/06

IS34C02B

ISSI®

TABLE 1

Normal Instructions

Command

PSWP

RSWP

WP1

ACK

Address

ACK

Data Byte

Write

(Permanent)

(Reversible)

Command

Address

ACK

Cycle

Read

X

ACK

00h-FFh

ACK

Data Byte

ACK

No

Write

0

ACK

00h-FFh

ACK

Data Byte

ACK

Yes

Write

X

1

ACK

00h-FFh

ACK

Data Byte

ACK

No

Write

1

X

ACK

00h-7Fh

ACK

Data Byte

ACK

No

Write

X

1

X

ACK

00h-7Fh

ACK

Data Byte

ACK

No

Write

X

0

ACK

80h-FFh

ACK

Data Byte

ACK

Yes

Permanent Instructions

Command

PSWP

RSWP

WP1

ACK

Address

ACK

Data Byte

Write

(Permanent)

(Reversible)

Command

Address

ACK

Cycle

Read PSWP Status4

0

X

ACK

Dummy

ACK

Dummy

ACK

No

Address

Byte

Read PSWP Status

1

X

NoACK

—

No

Set PSWP

0

X

0

ACK

Dummy

ACK

Dummy

ACK

Yes

Address

Byte

Set PSWP

1

X

0

NoACK

—

No

Set PSWP

0

X

1

ACK

Dummy

ACK

Dummy

ACK

No

Address

Byte

Set PSWP

1

X

1

NoACK

—

No

Reversible Instructions

Command

PSWP

RSWP

WP1

ACK

Address

ACK

Data Byte

Write

(Permanent)

(Reversible)

Command

Address

ACK

Cycle

Read SWP Status4

X

0

X

ACK

Dummy

ACK

Dummy

ACK

No

Address

Byte

Read SWP Status

X

1

X

NoACK

—

No

Read CWP Status3,4

0

X

ACK

Dummy

ACK

Dummy

ACK

No

Address

Byte

Read CWP Status3

1

X

NoACK

—

No

Set RSWP

X

0

ACK

Dummy

ACK

Dummy

ACK

Yes

Address

Byte

Set RSWP

X

1

0

NoACK

—

No

Set RSWP

X

0

1

ACK

Dummy

ACK

Dummy

ACK

No

Address

Byte

Set RSWP

X

1

NoACK

—

No

Clear RSWP

0

X

0

ACK

Dummy

ACK

Dummy

ACK

Yes

Address

Byte

Clear RSWP

1

X

0

NoACK

—

No

Clear RSWP

0

X

1

ACK

Dummy

ACK

Dummy

ACK

No

Address

Byte

Clear RSWP

1

X

1

NoACK

—

No

Notes:

1. WP = 1 if input level is High. WP = 0 if input level is GND or floating.

2. X = Don’t Care.

3. Read CWP Status yields the same result as Read PSWP Status.

4. Read out Don't Care Dummy Address and Dummy Data is optional.

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