S24CS02A datasheet(9/47 Pages) SII

9 / 47 page

2-WIRE CMOS SERIAL E2PROM

Rev.4.4_00

S-24CS01A/02A/04A/08A

Seiko Instruments Inc.

Pin Functions

1. Address Input Pins (A0, A1 and A2)

The slave address is assigned by connecting pins A0, A1 and A2 to the GND or to the VCC respectively.

One of the eight different slave address can be assigned to the S-24CS01A/02A by the combination of

pins A0, A1 and A2.

The slave address is assigned by connecting pins A1 and A2 to the GND or to the VCC respectively. One of

the four different slave address can be assigned to the S-24CS04A by the combination of pins A1 and A2.

The slave address is assigned by connecting the A2 pin to the GND or to the VCC respectively. The two

different slave address can be assigned to the S-24CS08A by A2 pin.

The given slave address, which is compared with the slave address transmitted from the master device, is

used to select the one among the multiple devices connected to the bus. The address input pin should be

connected to the GND or to the VCC.

2. SDA (Serial Data Input / Output) Pin

The SDA pin is used for bi-directional transmission of serial data. It consists of a signal input pin and an

Nch open-drain output pin.

The SDA line is usually pulled up to the VCC, and OR-wired with other open-drain or open-collector output

devices.

3. SCL (Serial Clock Input) Pin

The SCL pin is used for serial clock input. Since signals are processed at the rising or falling edge of the

SCL clock input signal, attention should be paid to the rising time and falling time to conform to the

specifications.

4. WP Pin

The write protection is enabled by connecting the WP pin to the VCC. When there is no need for write

protection, connect the pin to the GND.

S24CS02A 数据表(PDF) 9 Page - Seiko Instruments Inc