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ATA5577 Datasheet(PDF) 4 Page - ATMEL Corporation |
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ATA5577 Datasheet(HTML) 4 Page - ATMEL Corporation |
4 / 8 page 4 4967DS–RFID–10/08 ATA5577 [Preliminary] 4.9 Mode Register The mode register maintains a readable shadow copy of the configuration data held in block 0 of the EEPROM. It is continually refreshed during read mode and (re-)loaded after every POR event or reset command. On delivery, the mode register is pre-programmed with default values (see full version of the datasheet). 4.10 Modulator The modulator encodes the serialized EEPROM data for transmission to a tag reader or base station. Several types of modulation are available including Manchester, bi-phase, FSK, PSK, and NRZ. 4.11 Memory The memory is a 363-bit EEPROM, which is arranged in 11 blocks of 33 bits each. Each block includes a single Lock bit, which is responsible for write-protecting the associated block. Pro- gramming takes place on a block basis, so a complete block (including lock bit) can be programmed with a single command. The memory is subdivided into two page areas. Page 0 contains 8 blocks and page 1 contains 4 blocks. All 33 bits of a block, including the lock bit, are programmed simultaneously. Figure 4-2. Memory Map 0 1.........................................................................................32 L Analog front end option set-up Block 3 1 Traceability data Block 2 1 Traceability data Block 1 L Page 0 configuration data Block 0 L User data or password Block 7 L User data Block 6 L User data Block 5 L User data Block 4 L User data Block 3 L User data Block 2 L User data Block 1 L Configuration data Block 0 32 bits Not transmitted |
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