Maker : ATMEL Corporation
Part No. : ATA5575M1

Datasheet PDF : ATA5575M1.pdf
Cross Reference : ATA5575M1 Cross Reference
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Features • • • • • • • Contactless Power Supply Contactless Read/Write Data Transmission Radio Frequency fRF from 100 kHz to 150 kHz 128-bit EEPROM User Memory: 16 Bytes (8 Bits Each) 8-bit Configuration Memory High Q-antenna Tolerance Due to Built-in Options Applications – Access Control • Standard Unique Format (Manchester, RF/64) • 40-bitData Memory • 14-bit Parity Memory • 9-bit Header Memory On-chip Trimmed Antenna Capacitor – 330 pF ±3% – 250 pF ±3% Mega Pads 200 µm × 400 µm Mega Pads 200 µm × 400 µm with 25 µm Gold Bumps for Direct Coil Bonding Other Options: – Direct Access Mode – OTP Functionality • Read/Write LF RFID IDIC 100 kHz to 150 kHz ATA5575M1 Summary Preliminary • • • 1. Description The ATA5575 is a contactless read/write identification IC (IDIC®) for applications in the 100-kHz to 150-kHz frequency band. A single coil connected to the chip serves as the IC’s power supply and bi-directional communication interface. The antenna and chip together form a transponder or tag. The on-chip 128-bit user EEPROM (16 bytes with 8 bits each) can be read and written byte-wise from a base station (reader). Data is transmitted from the IDIC (uplink) using load modulation. This is achieved by damping the RF field with a resistive load www.DataSheet4U.com between the two terminals Coil 1 and Coil 2. The IC receives and decodes serial base station commands (downlink), which are encoded as 100% amplitude modulated (OOK) pulse-interval-encoded bit streams. The ATA5575 is an EEPROM-based circuit. It is optimized for maximum read range. Programming is also possible, but the write range is limited. The chip has to be locked after loading the application-specific data into the device. Until the enable bits are set properly, the ATA5575M1 transmits all digits “0” in unique format. Typical applications run at 125 kHz. NOTE: This is a summary document. The complete document is available. For more information, please contact your local Atmel sales office. 9167AS–RFID–11/09 2. System Block Diagram Figure 2-1. RFID System Using ATA5575 Tag Transponder Power Reader or Base station Coil interface Controller Memory Data ATA5575 3. ATA5575 - Functional Blocks Figure 3-1. Block Diagram Modulator POR Coil 1 Analog front end Mode register Write decoder Memory (136-bit EEPROM) Controller Coil 2 www.DataSheet4U.com Data-rate generator Input register Test logic HV generator 2 ATA5575M1 [Preliminary] 9167AS–RFID–11/09 ATA5575M1 [Preliminary] 4. Analog Front End (AFE) The AFE includes all circuits which are directly connected to the coil terminals, it generates the IC’s power supply and handles the bi-directional data communication with the reader. The AFE consists of the following blocks: • Rectifier to generate a DC supply voltage from the AC coil voltage • Clock extractor • Switchable load between Coil 1 and Coil 2 for data transmission from tag to the reader • Field-gap detector for data transmission from the base station to the tag • ESD protection circuitry 4.1 Data Rate Generator The data rate is fixed to RF/64. 4.2 Write Decoder The write decoder detects the write gaps and verifies the validity of the data stream according to the Atmel® downlink protocol (pulse interval encoding). 4.3 HV Generator This on-chip charge pump circuit generates the high voltage required for programming the EEPROM. 4.4 DC Supply Power is externally supplied to the IDIC via the two coil connections. The IC rectifies and regulates this RF source and uses it to generate its supply voltage. 4.5 Power-On Reset (POR) The power-on reset circuit blocks the voltage supply to the IDIC until an acceptable voltage threshold has been reached. This, in turn, triggers the default initialization delay sequence. During this configuration period of 98 field clocks, the ATA5575 is initialized with the configuration data stored in EEPROM byte 16. www.DataSheet4U.com 4.6 ...

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