24LC00-ESLASHP datasheet(5/34 Pages) MICROCHIP

5 / 34 page

 1996-2011 Microchip Technology Inc.

DS21178H-page 5

24AA00/24LC00/24C00

3.0

FUNCTIONAL DESCRIPTION

The 24XX00 supports a bidirectional 2-wire bus and

data transmission protocol. A device that sends data

onto the bus is defined as a transmitter, and a device

receiving data as a receiver. The bus has to be

controlled by a master device which generates the

Serial Clock (SCL), controls the bus access, and

generates the Start and Stop conditions, while the

24XX00 works as slave. Both master and slave can

operate as transmitter or receiver, but the master

device determines which mode is activated.

4.0

BUS CHARACTERISTICS

The following bus protocol has been defined:

• Data transfer may be initiated only when the bus

is not busy.

• During data transfer, the data line must remain

stable whenever the clock line is high. Changes in

the data line while the clock line is high will be

interpreted as a Start or Stop condition.

Accordingly, the following bus conditions have been

defined (Figure 4-1).

4.1

Bus Not Busy (A)

Both data and clock lines remain high.

4.2

Start Data Transfer (B)

A high-to-low transition of the SDA line while the clock

(SCL) is high determines a Start condition. All

commands must be preceded by a Start condition.

4.3

Stop Data Transfer (C)

A low-to-high transition of the SDA line while the clock

(SCL) is high determines a Stop condition. All

operations must be ended with a Stop condition.

4.4

Data Valid (D)

The state of the data line represents valid data when,

after a Start condition, the data line is stable for the

duration of the high period of the clock signal.

The data on the line must be changed during the low

period of the clock signal. There is one bit of data per

clock pulse.

Each data transfer is initiated with a Start condition and

terminated with a Stop condition. The number of the

data bytes transferred between the Start and Stop

conditions is determined by the master device and is

theoretically unlimited.

24LC00-E/P 数据表(PDF) 5 Page - Microchip Technology

24LC00-E/P 数据表(HTML) 5 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34

数据表下载