10

ADVANCED INFORMATION

Rev. 00D

03/21/06

IS34C02B

Figure 5. Command Configuration

Figure 4. Data Validity Protocol

SCL

SDA

Data Stable

Data Stable

Data Change

Figure 6. Byte Write

SDA

Bus

Activity

S

T

A

R

T

M

S

B

L

S

B

M

S

B

W

R

I

T

E

S

T

O

P

R/

W

A

C

K

A

C

K

A

C

K

Data

Device

Address

Word Address

***

7

BIT

43

1

2

5

60

R/

W

A0

A1

A2

0

1

0

1

Normal

R/

W

A0

A1

A2

0

1

01

Permanent Write

Slave Device Address

A2

A2

A1

A0

A2

A1

A0

0

1

0

0

0

1

01

Set Write Protection

(SWP)

GND GND

0

1

1

0

0

1

01

Clear Write Protection

(CWP)

GND

Vcc

1

1

0

0

0

1

01

Read SWP

GND GND

1

1

1

0

0

1

01

Read CWP

GND

Vcc

A1

A0

Note:

2. Bits 1, 2, and 3 of the device address will be compared with the values on the external pins.