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Atmel Electronic Components Datasheet



U3280M

Transponder Interface



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U3280M pdf
Features
Contwacwtwle.DsastaPSohweeetr4SUu.cpomply and Communication Interface
Up to 10 kbaud Data Rate (R/O)
Power Management for Contactless and Battery Power Supply
Frequency Range 100 kHz to 150 kHz
32 x 16-bit EEPROM
Two-wire Serial Interface
Shift Register Supported Bi-phase and Manchester Modulator Stage
Reset I/O Line
Field Clock Extractor
Field and Gap Detection Output for Wake-up and Data Reception
Field Modulator with Energy-saving Damping Stage
Applications
Main Areas
– Access Control
– Telemetry
– Wireless Sensors
Examples:
– Wireless Passive Access and Active Alarm Control for Protection of Valuables
– Contactless Position Sensors for Alignments of Machines
– Contactless Status Verification and/or Data Readout from Sensors
Transponder
Interface for
Microcontroller
U3280M
1. Description
The U3280M is a transponder interface for use in contactless ID systems, remote con-
trol systems, tag and sensor applications. It supplies the microcontroller with power
from an RF field via an LC-resonant circuit and it enables contactless bi-directional
data communication via this RF field. It includes power management that handles
switching between the magnetic field and a battery power supply. To store permanent
data like an identifier code and configuration data, the U3280M includes a 512-bit
EEPROM with a serial interface.
4688D–RFID–03/07



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U3280M pdf
Figure 1-1. Block Diagram
www.DataSheet4U.com
Energy
Coil 1
U3280M Transponder Interface
VField
regulator
Power
management
Damping
stage
Data
Rectifier
512-bit
EEPROM
memory
Coil 2
Field/gap
detect
Serial
interface
Clock
extractor
>_1
Bi-phase
modulator
FC NGAP MOD
VBatt
NRST
VDD
Sensors, keys, displays, actuators
Low power
microcontroller
SDA
SCL
VSS
Transmit data
Receive data/field detected
Field clock
2 U3280M
4688D–RFID–03/07



Part Number U3280M
Description Transponder Interface
Maker ATMEL Corporation - ATMEL Corporation
Total Page 21 Pages
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