ATA5570 ATMEL Corporation, ATA5570 Datasheet - Page 3

• Manufacturer Part Number: ATA5570
• Description: Multifunctional 330-bit Read/write RF Sensor Identification IC
• Manufacturer: ATMEL Corporation

4. ATA5570 – Building Blocks
4.1
4.2
4.3
4863A–RFID–07/05
Analog Front End (AFE)
Data-rate Generator
Write Decoder
Figure 4-1.
The AFE includes all circuits which are directly connected to the coil. It generates the IC’s power
supply and handles the bi-directional data communication with the reader. It consists of the fol-
lowing blocks:
The data rate is binary programmable to operate at any data rate between RF/2 and RF/128 or
equal to any of the fixed e5550/e5551 and T5554 bit rates (RF/8, RF/16, RF/32, RF/40, RF/50,
RF/64, RF/100 and RF/128).
This function decodes the write gaps and verifies the validity of the data stream according to the
Atmel e555x write method (pulse interval encoding).
• Rectifier to generate a DC supply voltage from the AC coil voltage
• Clock extractor
• Switchable load between COIL1 and COIL2 for data transmission from tag to the reader
• Field gap detector for data transmission from the base station to the tag
• ESD protection circuitry
LR
Block Diagram
COIL1
COIL2
C
R
VSS
Modulator
Mode register
Controller
Test logic
R
SENS
S
ATA5570 [Preliminary]
HV generator
Input register
EEPROM)
Memory
(264 bit
POR
3