ST25TB512-AT屬于RF/IF射頻/中頻RFID的RFID射頻接入監(jiān)控IC。由意法半導(dǎo)體集團制造生產(chǎn)的ST25TB512-ATRFID，射頻接入，監(jiān)控 ICRFID 或射頻接入監(jiān)控 IC 是配置為射頻識別 (RFID) 讀取器、應(yīng)答器、無源接入/無源啟動處理器和輪胎壓力監(jiān)測系統(tǒng) (TPMS) 的半導(dǎo)體器件。這些器件的設(shè)計符合 EPC、ISO、NFC、MiFARE 和 FeliCa 等特定 RFID 標(biāo)準(zhǔn)，并通過 I2C、SPI、UART、USB、PWM、RS232、RS422、RS485 及其他接口進(jìn)行通信。

特性 Features

? ISO 14443-2 Type B air interface compliant

? ISO 14443-3 Type B frame format compliant

? 13.56 MHz carrier frequency

? 847 kHz subcarrier frequency

? 106 Kbit/second data transfer

? 8 bit Chip_ID based anticollision system

? 2 count-down binary counters with automated anti-tearing protection

? 64-bit Unique Identifier

? 512-bit EEPROM with write protect feature

? Read_block and Write_block (32 bits)

? Internal tuning capacitor: 68 pF

? 1 million erase/write cycles

? 40-year data retention

? Self-timed programming cycle

? 5 ms typical programming time

Application

? Transport

描述 Description

The ST25TB512-AT is a contactless memory, powered by an externally transmitted radio wave. It contains a

512-bit user EEPROM. The memory is organized as 128 blocks of 32 bits. The ST25TB512-AT is accessed via

the 13.56 MHz carrier. Incoming data are demodulated and decoded from the received amplitude shift keying

(ASK) modulation signal and outgoing data are generated by load variation using bit phase shift keying (BPSK)

coding of a 847 kHz sub-carrier. The received ASK wave is 10 modulated. The data transfer rate between the

ST25TB512-AT and the reader is 106 kbit/s in both reception and emission modes.

The ST25TB512-AT follows the ISO 14443 - 2 Type B recommendation for the radio-frequency power and signal

interface.