T5557 card-level parameters of the technical information

T5557 Non-contact IC card Introduction:

　　T5557 Atmel Corporation in the United States non-contact multi-function R / W Identification IC, suitable for 125 KHz frequency range. Chips need to connect an antenna coil, the coil is considered the electric supply circuit chip and two-way communication interfaces. Together constitute the sensor antenna and the chip card or tag. The chip is a total of 330 bit in the EPROM (distribution of 10 blocks, each block is 33 bit), from the reader on T5557 is read / write. Block 0 is reserved for setting the T5557 is the mode of operation parameter configuration block. Block 7 can be used for user data blocks, can also protect all data blocks and set a user password to prevent unauthorized use of illegal rewriting. Data transmission, is loaded from the identification of modulator integrated circuit to complete. When the IC receives the reader's scanning field, the coil 2 will end in "1" and "2" flu birth to a RF field strength to resist, then to 100% of the amplitude modulation encoding and decoding, so get reader The relevant commands and data and information back to the card reader.

Brief Description:
　　△ non-contact method of read / write data transfer
　　△ from 100 KHz to 150 KHz carrier frequency of radio
　　△ products compatible with the e5550 and expand the application of model
　　△ small capacity, and its structure with the international standards ISO / IEC 11784 / 785 compliant
　　△ in the chip mask with 75 pF resonant capacitor
　　△ including 32 bit code area, including 7 x 32 bit in the E2PROM memory
　　△ set up a separate 64 bit memory space as the company's data area can be traced back
　　△ 32-bit configuration register in the E2PROM can be set as follows:
　　△ Data Rate: RF / 2 to RF/128 or e5550 fixed value (usually used in RF/32 or RF/64)
　　△ modulation / coding and decoding: FSK, PSK, Manchester, duplex, NRZ (typical: Manchester)
　　△ Other options: password mode, the largest block of properties, according to the request to answer (AOR) mode (default: PASS = 0, MAXB = 7, AOR = 0); 　　Reverse data output, the direct access model, serial terminator , write protection (each a full locking position), OTP function.
Storage structure: a 330 bit memory banks of E2PROM, scheduled for 0 and 1 of 10 blocks, each blocks (including 1 bit is also planning block lock-bit) with 33 bit. Page 0 has 8 memory blocks, where block 0 contains the configuration / control data, during normal read operation is not being transmitted. Block 7 can be the user password to use as a write-protected, and display the value with the largest block, some blocks can be set to the value or 7 password value is not visible, only the legitimate users know the password to access the card in the data block. Each memory bank bit first, that the first 0 bit, the block can not see but can be rewritten once the lock block control bits (OTP feature. For safety reasons, one should rewrite the provision of section 0 of the OTP block feature). Page 1 of block 1 and block 2 contains the traceability data, and manufacturing test was Atmel in the data during the planning and locked.

Application examples:
　　T5557 contactless R / W identification chip storage capacity of the smaller more, remove the user can not use the page 1, the actual use of space only page 0 of 8 blocks (264 bit), but its mode of configuration items, and particularly rich, is a truly multi-chip IC, the user access patterns on the card chip storage capacity also identify some, though small, remove the user can not use the page 1, the actual use of space only page 0 of 8 blocks (264 bit), but its mode of configuration items and particularly rich, is a truly multi-chip IC is more flexible, for example, direct access can be set according to mode of access requests, visits by password mode. And a card with different configuration or different working patterns T5557 reader will not allow communication and data exchange, with good protection. It is worth mentioning that the chip card reader family with a high cost.

　　T5557 replaced early E5550/5551 major upgrade chip, chip is widely used in various forms of identification, such as transportation and tourism, health communication, education, entertainment and other diverse applications, such as hotel door cards, health insurance card, campus card, business / factory attendance cards, fuel cards, network cards, dinner cards, game cards, student achievement cards, phone cards, theater cards, entertainment cards, etc.