TK5552A-PP Atmel, TK5552A-PP Datasheet - Page 10

• Manufacturer Part Number: TK5552A-PP
• Manufacturer: Atmel

Specifications of TK5552A-PP

• Operating Temperature Classification: Commercial
• Lead Free Status / RoHS Status: Compliant

Figure 8-1.
8.3
8.3.1
8.3.2
8.3.3
8.3.4
8.3.5
10
Functional Modules
TK5552
Controller
Clock Extraction
Data Rate Generator
Bit Decoder
Analog Front End (AFE)
Base station
Base station
Transponder System Example Using Transponder IC
The Analog Front End (AFE) includes all circuits which are directly connected to the coil. It gen-
erates the IC's power supply and handles the bi-directional data communication with the base
station. It consists of the following blocks:
The control logic is responsible for the following:
The clock extraction circuit generates the internal clock source out of the external RF signal.
The data rate in uplink mode can be selected to operate at either RF/16 (nominally 7.81 kHz,
default) or RF/32 (nominally 3.91 kHz).
This functional block decodes the field gaps and verifies the validity of the incoming data stream.
• Rectifier to generate a DC supply voltage from the AC coil voltage
• ESD protection
• Clock extractor
• Switchable load between Clock-A/Clock-B for data transmission from the IC to the reader
• Field gap detector for data transmission from the base station to the IC (downlink mode)
• Initializing and refreshing configuration register from EEPROM block 0
• Controlling read and write memory access
• Handling data transmission and opcode decoding
• Error detection and error handling
electronics (uplink mode)
downlink
uplink
Power
Power
Data
Data
Transponder
Transponder
Transponder IC
Memory
Memory
4698B–RFID–08/05