T555401N-DDW Atmel, T555401N-DDW Datasheet - Page 3

• Manufacturer Part Number: T555401N-DDW
• Manufacturer: Atmel

Specifications of T555401N-DDW

• Screening Level: Industrial
• Lead Free Status / Rohs Status: Supplier Unconfirmed

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4576D–RFID–12/06
Resonance Capacitor
Controller
Bitrate Generator
Write Decoder
Test Logic
HV Generator
Power-On Reset (POR)
Mode Register
The resonance capacitor is integrated on chip. By mask option the value can be 80 pF or 210 pF
typically.
The main controller has the following functions:
The bitrate generator can deliver the following bitrates:
RF/8 – RF/16 – RF/32 – RF/40 – RF/50 – RF/64 – RF/100 – RF/128
Decode the detected gaps during writing. Check if write data stream is valid.
Test circuitry allows rapid programming and verification of the IC during test.
Voltage pump which generates 18V for programming of the EEPROM.
The power-on reset is a delay reset which is triggered when supply voltage is applied.
The mode register stores the mode data from EEPROM block 0. It is continually refreshed at the
start of every block. This increases the reliability of the device (if the originally loaded mode
information is false, it will be corrected by subsequent refresh cycles).
• Load mode register with configuration data from EEPROM block 0 after power-on and also
• Control memory access (read, write)
• Handle write data transmission and the write error modes
• The first two bits of the write data stream are the OP-code. There are two valid OP-codes
• In password mode, the 32 bits received after the OP-code are compared with the stored
during reading
(standard and stop) which are decoded by the controller.
password in block 7.
T5554
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