4

Atmel AT24CS01/02 [PRELIMINARY DATASHEET]

8815A–SEEPR–6/12

5.

Pin Description

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.

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, “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

This operation is summarized in Table 5-1 below.

Table 5-1.

Write Protect

WP Pin

Status

Part of the Array Protected

Atmel AT24CS01/02

Full Array

At GND

Normal Read/Write Operations