Atmel ATA5577C 125kHz無接觸RFID IDIC讀寫器解決方案

1、atmel ata5577c 125khz無接觸rfid idic讀寫器解決方案公司的 ata5577c是100khz-150khz的無接觸讀/寫 idic,單個線圈銜接帶芯片，用作ic的電源和雙向通信接口，天線和芯片一起組成異頻雷達收發(fā)機或標簽。器件具有353位eeprom存儲器（7x32位eeprom為用戶存儲器包括32位密碼存儲器，2x32位用作id，1x32位為挑選用寄存器），和iso/iec 11784/785兼容，主要用在下一代接入控制如賓館客房，工程部門，辦公室，停車場，時光記錄系統(tǒng)，會員卡等。本文介紹了ata5577c主要特性，方框圖以及系統(tǒng)框圖，基于的125khz rfid評

2、估套件主要特性以及系統(tǒng)框圖。read/write lf rfid idic 100 to 150khzthe atmel ata5577c is a contactless read/write identification ic (idic ) for applications in the 125khz or 134khz frequency band. a single coil connected to the chip serves as the ics power supply and bi-directional communication interface. the ante

3、nna and chip together form a transponder or tag.the on-chip 363-bit eeprom (11 blocks with 33 bits each) can be read and written block-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 be

4、tween 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 atmel ata5577c is designed to be compatible with the atmel t7/ata5567. the structure of the conf

5、iguration register is identical. the two modes, basic mode and extended mode, are also available. the atmel ata5577c is able to replace the atmel e5551/t5551 in most common operation modes. in all applications, the correct functionality of the replacements must be evaluated and proved.ata5577c主要特性：c

6、ontactless power supplycontactless read/write data transmissionradio frequency frf from 100khz to 150khzbasic mode or extended modecompatible with atmel t5557, ata5567replacement for atmel e5551/t5551 in most common operation modesconfigurable for iso/iec 11784/785 compatibilitytotal 363 bits eeprom

7、 memory: 11 blocks (32 bits + 1 lock bit) 7x 32 bits eeprom user memory, including 32-bit password memory 2x 32 bits for unique id 1x 32-bit option register in eeprom to set up the analog front end:clock and gap detection levelimproved downlink timingclamp and modulation voltagesoft modulation switc

8、hingwrite damping like the atmel t5557/ata5567 or with resistordownlink protocol 1x 32-bit configuration register in eeprom to set up:data rate: rf/2 to rf/128, binary selectable or fixed basic mode ratesmodulation/coding: bi-phase, manchester, fsk, psk, nrzother options: password mode max block fea

9、ture direct access mode sequence terminator(s) blockwise write protection (lock bit) answer-on-request (aor) mode inverse data output disable test mode access fast downlink (6kbits/s versus 3kbits/s) otp functionality init delay (67ms)high q-antenna tolerance due to build in optionsadaptable to different applications: access control, animal id and wastemanagementon-chip trimmed antenna capacitor: 250pf/330pf (±3%) 75pf/130pf (on request) without on-chip ca