AK6004A(2002) 데이터 시트보기 (PDF) - Asahi Kasei Microdevices

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AK6004A
(Rev.:2002)

I2C bus 4K / 16Kbit Serial CMOS EEPROM

Asahi Kasei Microdevices 

ASAHI KASEI

[AK6004A/08A]

„ DATA TRANSFER

All commands are preceded by a START condition. After the START condition, a slave address is

sent. After the AK6004A/08A recognizes the START condition, the devices interfaced to the bus

wait for the slave address to be transmitted over the SDA line. If the transmitted slave address

matches an address of one of the devices, the designated slave pulls the SDA line to LOW

(ACKNOWLEDGE).

The data transfer is always terminated by a STOP condition generated by the master.

[Data validity]

The data on the SDA line must be stable during the HIGH period of the clock. The HIGH or LOW

state of the data line can only change when the clock signal on the SCL line is LOW.

SCL

SDA

DATA STABLE DATA

CHANGE

Figure 1. Data transfer

[START and STOP condition]

A HIGH to LOW transition on the SDA line while SCL is HIGH defines a START condition. All

commands are preceded by the START condition.

A LOW to HIGH transition on the SDA line while SCL is HIGH defines a STOP condition. All

communications are terminated by the STOP condition. After a read sequence, the STOP

condition will place the EEPROM in a standby power mode.

SCL

SDA

START CONDITION

Figure 2. Start and Stop Definition

STOP CONDITION

DAI01E-02

-3-

2002/11

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