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Atmel Electronic Components Datasheet

U3280M Datasheet

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



Atmel Electronic Components Datasheet

U3280M Datasheet

Transponder Interface

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U3280M pdf
Figure 1-1. Block Diagram
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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



Atmel Electronic Components Datasheet

U3280M Datasheet

Transponder Interface

No Preview Available !

U3280M pdf
2. Pin Configuration
www.DataSheet4U.com
Figure 2-1. Pinning
VBatt
VDD
SCL
NRST
SDA
VSS
NC
FC
1
2
3
4
5
6
7
8
16 Coil 2
15 Coil 1
14 NC
13 NC
12 NC
11 NC
10 NGAP
9 MOD
U3280M
Table 2-1.
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Pin Description
Symbol Function
VBatt
Power supply voltage input to connect a battery
VDD
Power supply voltage for the microcontroller and EEPROM. At this pin a buffer capacitor (0.5 to 10 µF)
must be connected to buffer the voltage during field supply and to block the VDD of the microcontroller.
SCL Serial clock line
NRST Reset line bi-directional
SDA
Serial data line
VSS
Circuit ground
NC Not connected
FC Field clock output of the front-end clock extractor
MOD
Modulation input
NGAP Gap and field detect output
NC Not connected
NC Not connected
NC Not connected
NC Not connected
Coil 1 Coil input 1. Use pin to connect a resonant circuitry for communication and field supply
Coil 2 Coil input 2. Use pin to connect a resonant circuitry for communication and field supply
4688D–RFID–03/07
3




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




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