AT24C01C Ver la hoja de datos (PDF) - Atmel Corporation

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componentes Descripción

Fabricante

AT24C01C

I²C-Compatible (2-wire) Serial EEPROM 1-Kbit (128 x 8), 2-Kbit (256 x 8)

Atmel Corporation 

3. Block Diagram

VCC

GND

WP

SCL

SDA

A2

A1

A0

Start

Stop

Logic

LOAD

Device

Address

Comparator

R/W

Serial

Control

Logic

COMP

LOAD INC

EN H.V. Pump/Timing

Data Recovery

Data Word

Addr/counter

EEPROM

DIN

DOUT

Y DEC

Serial MUX

DOUT/ACK

Logic

4. 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.

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

AT24C01C/02C. As many as eight 1-Kbit or 2-Kbit devices may be addressed on a single bus system. See Section 7.

“Device Addressing” on page 9 for more details.

Write Protect (WP): The AT24C01C/02C have a Write Protect pin that provides hardware data protection. The Write

Protect pin allows normal read/write operations when connected to ground (GND). When the Write Protect pin is

connected to VCC, the write protection feature is enabled and operates as shown below in Table 4-1.

Table 4-1. Write Protect

WP Pin

Status

At VCC

At GND

Part of the Array Protected

Atmel AT24C01C and AT24C02C

Full (2K) Array

Normal Read/Write Operations

Atmel AT24C01C/02C [DATASHEET]

3

8700F–SEEPR–6/12

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