AT24RF08CN-10SC

AT24RF08CN-10SC Datasheet

Compatible with a Standard AT24C08 Serial EEPROM Programmable Access Protection to Limit Reads or Writes from Either Port Lock/Unlock Function, Coil Connection Detection<br>• RFID Interface 125 kHz Carrier Frequency for Long Range Access 2-Wire Connection to External Coil Antenna and Tuning Capacitor Multi-tag Management to Handle Several Tags in the Field at Once 12 RFID Commands for Tag Control and Memory Read/Write ID Write and Lock from RFID Port Ultra Low Power Single Bit Write - 25 µA<br>• Highly-reliable EEPROM Memory 8K bits 1K bytes , Organized as 8 Blocks of 128 Bytes Each 16-byte Page Write, 10 ms Write Time 10 Years Retention, 100K Write Cycle Endurance<br>• -40°C to +85°C Operation, 2.4V to 5.5V Supply, 8-Lead JEDEC SOIC Package

Part	Datasheet
AT24RF08CN-10SC	AT24RF08CN-10SC (pdf)

PDF Datasheet Preview
• Dual-port Nonvolatile Memory - RFID and Serial Interfaces • Two-wire Serial Interface: Compatible with a Standard AT24C08 Serial EEPROM Programmable Access Protection to Limit Reads or Writes from Either Port Lock/Unlock Function, Coil Connection Detection • RFID Interface 125 kHz Carrier Frequency for Long Range Access 2-Wire Connection to External Coil Antenna and Tuning Capacitor Multi-tag Management to Handle Several Tags in the Field at Once 12 RFID Commands for Tag Control and Memory Read/Write ID Write and Lock from RFID Port Ultra Low Power Single Bit Write - 25 µA • Highly-reliable EEPROM Memory 8K bits 1K bytes , Organized as 8 Blocks of 128 Bytes Each 16-byte Page Write, 10 ms Write Time 10 Years Retention, 100K Write Cycle Endurance • -40°C to +85°C Operation, 2.4V to 5.5V Supply, 8-Lead JEDEC SOIC Package The AT24RF08C functions as a dual access EEPROM, with both a wired serial port and a wireless RFID port used to access the memory. Access permissions are set from the serial interface side to isolate blocks of memory from improper access. The RFID interface can be powered solely from the attached coil permitting remote reads and writes of the device when VCC is not applied. Block Diagram Asset Identification EEPROM AT24RF08C Pin Configurations Pin Name Function Coil Connection Coil Connection PROT Protection Input Ground Serial Data,Open Drain I/O Serial Clock Input Write Protect Input Supply 2.4V - 5.5V 8-Pin SOIC L1 1 L2 2 PROT 3 GND 4 8 VCC 7 WP 6 SCL 5 SDA General Overview The AT24RF08C is intended to be pin compatible with standard serial EEPROM devices except for pins 1, 2 and 3, which are address pins in the standard part. Other exceptions to the AT24C08 Serial EEPROM data sheet are noted in the “Serial EEPROM Exceptions” section later in this document. Connection of an external coil antenna and optional tuning capacitor, normally via a two conductor wire, is all that is required to complete the RFID hardware requirements. Throughout this document, the term “reader” is defined as the base station that communicates with the chip. Under all expected conditions, it actually serves as both a reader and writer. The term ‘tag’ is used to indicate the chip when operating as an RFID transponder with the coil attached. All bits are sent to or read from the device, most significant bit first, in a manner consistent with the AT24C08 Serial EEPROM. The bit fields in this document are correspondingly listed with the MSB on the left and the LSB on the right. EEPROM Organization The EEPROM memory is broken up into 8 blocks of 1K bits 128 bytes each. Within each block, the memory is physically organized into 8 pages of 128 bits 16 bytes each. In some instances, accesses take place on a 32-bit 4 byte word basis. In addition to these 8K bits, there are two more 128-bit pages that are used to store the access protection and ID information. There are a total of 8448 bits of EEPROM memory available on the AT24RF08C. Access protection both read and write is organized on a block basis for blocks 1 through 7 and on a page and block basis for block Protection information for these blocks and pages is stored in one of the additional pages of EEPROM memory that is addressed separately from the main data storage array. See “Access Protection” on page 3 for more details. The ID value see “ID Configuration” on page 7 is located in the ID page of the EEPROM, the second of the additional 16 byte pages. Writes from the serial port may include from one to 16 bytes at a time, depending on the protocol followed by the bus master. Accesses to the EEPROM from the RFID port are on either a word 32 bits or page 128 bits basis only. All page accesses must be properly aligned to the internal EEPROM page. The EEPROM memory offers an endurance of 100,000 write cycles per byte, with 10 year data retention. Writes to the EEPROM and tamper bit take less than 10 ms to complete. Completion time for writes initiated from the RFID port are different depending on the situation. When external power is supplied to the chip through the VCC pin, writes to the EEPROM and tamper bit take less than ms when measured from the last modulation edge before the write to the first after the write. When powered from the coil pins at 125 KHz, the EEPROM write time will be ms and the tamper write time will be ms. Device Access The third device address bit in the two wire protocol that is usually matched to A2 pin 3 on a standard AT24C08 serial EEPROM is internally connected high, so device addresses A8 through AF hex are used to access the memory on the chip. The general command encoding used by the serial port for EEPROM accesses is shown below in Device Access Examples, where B2-0 is the block number, P2-0 is the page number within the block and A3-0 is the byte address within the page. Bits denoted as “x” are ignored by the device. The PROT pin is used as a power good signal. When this pin is low, the serial port is held in reset and all sticky bits are set to one. When high, activity on the serial bus is permitted. Device Access Examples For Write Operations: 1 0 1 0 1 B2 B1 0 B0 P2 P1 P0 A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0 For Read Operations: Ordering Information Package 8S1 Package Mark 24RF08CN Ordering Code AT24RF08CN - 10SC Packaging Information 8S1, 8-Lead, Wide, Plastic Gull Wing Small Outline JEDEC SOIC Dimensions in Millimeters and Inches PIN 1 AT24RF08C Atmel Headquarters Corporate Headquarters 2325 Orchard Parkway San Jose, CA 95131 TEL 408 441-0311 FAX 408 487-2600 Europe Atmel U.K., Ltd. Coliseum Business Centre Riverside Way Camberley, Surrey GU15 3YL England TEL 44 1276-686-677 FAX 44 1276-686-697 Asia Atmel Asia, Ltd. Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimhatsui East Kowloon Hong Kong TEL 852 2721-9778 FAX 852 2722-1369 Japan Atmel Japan K.K. 9F, Tonetsu Shinkawa Bldg. 1-24-8 Shinkawa Chuo-ku, Tokyo 104-0033 Japan TEL 81 3-3523-3551 FAX 81 3-3523-7581 Atmel Operations Atmel Colorado Springs 1150 E. Cheyenne Mtn. Blvd. Colorado Springs, CO 80906 TEL 719 576-3300 FAX 719 540-1759 Atmel Rousset Zone Industrielle 13106 Rousset Cedex France TEL 33 4-4253-6000 FAX 33 4-4253-6001 Fax-on-Demand North America 1- 800 292-8635 International 1- 408 441-0732 e-mail Web Site BBS 1- 408 436-4309 Atmel Corporation Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company’s standard warranty which is detailed in Atmel’s Terms and Conditions located on the Company’s web site. The Company assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel’s products are not authorized for use as critical components in life support devices or systems. Marks bearing and/or are registered trademarks and trademarks of Atmel Corporation. Terms and product names in this document may be trademarks of others. Printed on recycled paper.

PDF Datasheet Preview

• Dual-port Nonvolatile Memory - RFID and Serial Interfaces
• Two-wire Serial Interface:

Compatible with a Standard AT24C08 Serial EEPROM Programmable Access Protection to Limit Reads or Writes from Either Port Lock/Unlock Function, Coil Connection Detection
• RFID Interface 125 kHz Carrier Frequency for Long Range Access 2-Wire Connection to External Coil Antenna and Tuning Capacitor Multi-tag Management to Handle Several Tags in the Field at Once 12 RFID Commands for Tag Control and Memory Read/Write ID Write and Lock from RFID Port Ultra Low Power Single Bit Write - 25 µA
• Highly-reliable EEPROM Memory 8K bits 1K bytes , Organized as 8 Blocks of 128 Bytes Each 16-byte Page Write, 10 ms Write Time 10 Years Retention, 100K Write Cycle Endurance
• -40°C to +85°C Operation, 2.4V to 5.5V Supply, 8-Lead JEDEC SOIC Package

The AT24RF08C functions as a dual access EEPROM, with both a wired serial port and a wireless RFID port used to access the memory. Access permissions are set from the serial interface side to isolate blocks of memory from improper access. The RFID interface can be powered solely from the attached coil permitting remote reads and writes of the device when VCC is not applied.

Block Diagram

Asset Identification EEPROM

AT24RF08C

Pin Configurations

Pin Name

Function

Coil Connection

Coil Connection

PROT

Protection Input

Ground

Serial Data,Open Drain I/O

Serial Clock Input

Write Protect Input

Supply 2.4V - 5.5V
8-Pin SOIC

L1 1 L2 2 PROT 3 GND 4
8 VCC 7 WP 6 SCL 5 SDA

General Overview

The AT24RF08C is intended to be pin compatible with standard serial EEPROM devices except for pins 1, 2 and 3, which are address pins in the standard part. Other exceptions to the AT24C08 Serial EEPROM data sheet are noted in the “Serial EEPROM Exceptions” section later in this document. Connection of an external coil antenna and optional tuning capacitor, normally via a two conductor wire, is all that is required to complete the RFID hardware requirements.

Throughout this document, the term “reader” is defined as the base station that communicates with the chip. Under all expected conditions, it actually serves as both a reader and writer. The term ‘tag’ is used to indicate the chip when operating as an RFID transponder with the coil attached.

All bits are sent to or read from the device, most significant bit first, in a manner consistent with the AT24C08 Serial EEPROM. The bit fields in this document are correspondingly listed with the MSB on the left and the LSB on the right.

EEPROM Organization

The EEPROM memory is broken up into 8 blocks of 1K bits 128 bytes each. Within each block, the memory is physically organized into 8 pages of 128 bits 16 bytes each. In some instances, accesses take place on a 32-bit 4 byte word basis. In addition to these 8K bits, there are two more 128-bit pages that are used to store the access protection and ID information. There are a total of 8448 bits of EEPROM memory available on the AT24RF08C.

Access protection both read and write is organized on a block basis for blocks 1 through 7 and on a page and block basis for block Protection information for these blocks and pages is stored in one of the additional pages of EEPROM memory that is addressed separately from the main data storage array. See “Access Protection” on page 3 for more details.

The ID value see “ID Configuration” on page 7 is located in the ID page of the EEPROM, the second of the additional 16 byte pages.

Writes from the serial port may include from one to 16 bytes at a time, depending on the protocol followed by the bus master. Accesses to the EEPROM from the RFID port are on either a word 32 bits or page 128 bits basis only. All page accesses must be properly aligned to the internal EEPROM page.

The EEPROM memory offers an endurance of 100,000 write cycles per byte, with 10 year data retention. Writes to the EEPROM and tamper bit take less than 10 ms to complete.

Completion time for writes initiated from the RFID port are different depending on the situation. When external power is supplied to the chip through the VCC pin, writes to the EEPROM and tamper bit take less than ms when measured from the last modulation edge before the write to the first after the write. When powered from the coil pins at 125 KHz, the EEPROM write time will be ms and the tamper write time will be ms.

Device Access

The third device address bit in the two wire protocol that is usually matched to A2 pin 3 on a standard AT24C08 serial EEPROM is internally connected high, so device addresses A8 through AF hex are used to access the memory on the chip. The general command encoding used by the serial port for EEPROM accesses is shown below in Device Access Examples, where B2-0 is the block number, P2-0 is the page number within the block and A3-0 is the byte address within the page. Bits denoted as “x” are ignored by the device.

The PROT pin is used as a power good signal. When this pin is low, the serial port is held in reset and all sticky bits are set to one. When high, activity on the serial bus is permitted.

Device Access Examples

For Write Operations:
1 0 1 0 1 B2 B1 0

B0 P2 P1 P0 A3 A2 A1 A0

D7 D6 D5 D4 D3 D2 D1 D0

For Read Operations:
Ordering Information

Package 8S1

Package Mark 24RF08CN
Ordering Code AT24RF08CN - 10SC

Packaging Information
8S1, 8-Lead, Wide, Plastic Gull Wing Small Outline JEDEC SOIC Dimensions in Millimeters and Inches

PIN 1

AT24RF08C

Atmel Headquarters

Corporate Headquarters 2325 Orchard Parkway San Jose, CA 95131 TEL 408 441-0311 FAX 408 487-2600

Europe Atmel U.K., Ltd. Coliseum Business Centre Riverside Way Camberley, Surrey GU15 3YL England TEL 44 1276-686-677 FAX 44 1276-686-697

Asia Atmel Asia, Ltd. Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimhatsui East Kowloon Hong Kong TEL 852 2721-9778 FAX 852 2722-1369

Japan Atmel Japan K.K. 9F, Tonetsu Shinkawa Bldg. 1-24-8 Shinkawa Chuo-ku, Tokyo 104-0033 Japan TEL 81 3-3523-3551 FAX 81 3-3523-7581

Atmel Operations

Atmel Colorado Springs 1150 E. Cheyenne Mtn. Blvd. Colorado Springs, CO 80906 TEL 719 576-3300 FAX 719 540-1759

Atmel Rousset Zone Industrielle 13106 Rousset Cedex France TEL 33 4-4253-6000 FAX 33 4-4253-6001

Fax-on-Demand North America 1- 800 292-8635 International 1- 408 441-0732
e-mail

Web Site

BBS 1- 408 436-4309

Atmel Corporation Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company’s standard warranty which is detailed in Atmel’s Terms and Conditions located on the Company’s web site. The Company assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel’s products are not authorized for use as critical components in life support devices or systems.

Marks bearing and/or are registered trademarks and trademarks of Atmel Corporation. Terms and product names in this document may be trademarks of others.

Printed on recycled paper.

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived AT24RF08CN-10SC Datasheet file may be downloaded here without warranties.

Datasheet ID: AT24RF08CN-10SC 518891