LE24LB642CS

Bus Timing

tBUF

tSU.STO

tR

SCL

SDA/IN

SDA/OUT

tSU.STA

tHD.DAT

tHIGH

tLOW

tSU.DAT

tDH

tAA

tF

tHD.STA

tSP

tSP

Write Timing

tWC

SCL

SDA

D0

Write Data

Acknowledge

Stop

condition

Start

condition

Pin Functions

SCL (serial clock input) pin

The SCL pin is a serial clock input pin that processes signals at the rising and falling edges of SCL clock signals.

SDA (serial data input/output) pin

The SDA pin is used to transfer serial data to the input/output, and it consists of a signal input pin and n-channel

transistor open drain output pin.

Like the SCL pin, the SDA pin must be pulled up by a resistor to the VDD level and wired-ORed with an open drain

(or open collector) output device for use.

WP (write protect) pin

When the WP pin is high, write protection is enabled, and writing into the 64k bit memory areas is prohibited. When

the pin is low, writing is possible to all memory areas. Read operations can be performed regardless of the WP pin

status.

No.A1464-4/11