AT24CS01-SSHM-B データシートの表示（PDF） - Atmel Corporation

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AT24CS01-SSHM-B

I2C-Compatible (2-wire) Serial EEPROM with a Unique, Factory Programmed 128-bit Serial Number 1-Kbit (128 x 8), 2-Kbit (256 x 8)

Atmel Corporation 

5. Pin Descriptions

Serial Clock (SCL): The SCL input is used to positive edge clock data into each EEPROM device and negative

edge clock data out of each device.

Serial Data (SDA): The SDA pin is bidirectional for serial data transfer. This pin is open-drain driven and may

be wire-ORed with any number of other open-drain or open-collector devices.

Device/Page Addresses (A2, A1, A0): The A2, A1 and A0 pins are device address inputs that are hard wired for

the AT24CS01/02. As many as eight 1-Kbit or 2-Kbit devices may be addressed on a single bus system. For

more detail, see Section 8., “Device Addressing” on page 10.

Write Protect (WP): AT24CS01/02 has a Write Protect (WP) pin that provides hardware data protection. When

the Write Protect pin is connected to ground (GND), normal read/write operations to the full array are possible.

When the Write Protect pin is connected to VCC, all write operations to the memory are inhibited but read

operations are still possible. This operation is summarized in Table 5-1 below.

Table 5-1. Write Protect

WP Pin Status

At VCC

At GND

Part of the Array Protected

Full Array

Normal Read/Write Operations

4

AT24CS01/02 [DATASHEET]

Atmel-8815D-SEEPROM-AT24CS01-02-Datasheet_082014

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