AT88RF020

Features:

• 13.56 MHz RFID Chip for Cards or Tags
• 2048-bit Read/Write RFID EEPROM
• ISO 14443-2 Type B Compliant
• Full ISO 14443-3 Compliant Anticollision
• 100,000 Write Cycle Reliability
• 3 ms Write Time
• Password and Lockwrite Protection
• 82 pF Tuning Capacitor
• 0 70°C Operation


Pinout




Description

The AT88RF020 is a low-end 13.56 MHz RFID (Radio Frequency IDentification) device that includes an on-chip EEPROM-based (nonvolatile) memory. The wireless interface complies with Type B operation of ISO/IEC 14443. The specific sections of compliance are 14443-1, as well as 14443-2:1999(E) (dated 5/2/00) and 14443- 3:2000(E) (dated 7/13/00).

This device AT88RF020 is designed to be used in applications where one or more RFID devices will be simultaneously placed within an intelligent reader/writer RF field. Communication between the RF reader/writer and this device will take place through the use of the featured anticollision command set supported by this device.

The AT88RF020 memory contains a total of 2048 bits, organized as 32 64-bit pages. Write operations are designed to comp-lete in less than three milliseconds (ms). The endurance rating for the memory is 100,000 write cycles per byte.

This device AT88RF020 supports these security features: password checking, data locking,a oneway counter and a guaranteed unique serial number.

The AT88RF020 includes an on-chip internal tuning capacitor that enables it to operate with a single external coil antenna. This antenna completes the RFID channel.

All bits are sent to or read from the chip least significant bit first. Bit fields listed in this document are listed with the LSB on the left and the MSB on the right. Multibyte information is sent to the chip AT88RF020 least significant byte first.

The first byte sent to the chip AT88RF020 is stored in memory at the lowest address, and the internal address is incremented for subsequent bytes. Information is read from the memory and transmitted by the chip in exactly the same order in which it was written: the first bit written is the first bit read.

This specification follows the nomenclature found within the ISO/IEC 14443 document. Proximity Coupling Device (PCD) AT88RF020 is the reader/writer, and Proximity Integrated Circuit Card (PICC) is the tag/card. ETU refers to Elementary Time Unit, which is the time required to transmit or receive one bit. One ETU is equal to 128 carrier cycles (9.439
µs). RFU refers to any feature, item, bit field or bit that is held as Reserved for Future Use. When the reader/writer sends data to this device, RFU bits should always be "0". When this device sends data to the reader/writer, RFU bits are undefined.