U3280M-NFBY Atmel, U3280M-NFBY Datasheet
U3280M-NFBY
Specifications of U3280M-NFBY
Related parts for U3280M-NFBY
U3280M-NFBY Summary of contents
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... Contactless Status Verification and/or Data Readout from Sensors 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 ...
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... Figure 1-1. Block Diagram U3280M Transponder Interface Energy Damping Coil 1 Rectifier Coil 2 Field/gap Data U3280M 2 Power VField regulator management stage 512-bit EEPROM memory Serial interface detect Bi-phase Clock > extractor modulator MOD NGAP FC VBatt Sensors, keys, displays, actuators NRST VDD Low power ...
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... Coil input 1. Use pin to connect a resonant circuitry for communication and field supply 16 Coil 2 Coil input 2. Use pin to connect a resonant circuitry for communication and field supply 4688D–RFID–03/07 VBatt 1 16 Coil 2 VDD 2 15 Coil 1 SCL NRST SDA VSS NGAP MOD U3280M 3 ...
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... the operating range of the IC. DD The U3280M has built-in operating modes to support a wide range of applications. These modes can be activated via the serial interface with special mode control bytes. To support applications with battery supply only, power management can be switched off by software to disable the automatic switching to field supply. ...
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... The microcontroller must demodulate the incoming data stream at one of its inputs. 4688D–RFID–03/ CMS modulation voltage stroke at coil inputs CID If the automatic power management is disabled, the internal front-end V this case the value V must be used in the above formula. DDC U3280M is limited DDC 5 ...
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... U3280M Signals and Timing Figure 4-1. Modulation MOD Coil inputs Figure 4-2. GAP and Modulation Timing Gap detection and battery to field switching V FDON Coil inputs 1. edge used as wakeup signal NGAP Field clock FC Power management Battery supply 4.1 Digital Output of the Gap-detection Stage (NGAP) ...
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... Power Supply The U3280M has a power management that handles two power supply sources. Normally, the IC is supplied by a battery at the V of the device, the field detection circuit switches automatically from V The V DD the power while the field is modulated by gaps and damping. The EEPROM and the connected ...
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... EEPROM special mode, the serial interface can also be used to control the Bi-phase/Manchester modulator or the power management of the U3280M. The serial interface of the U3280M device must be controlled by a master device (normally the microcontroller) which generates the serial clock and controls the access via the SCL and SDA lines ...
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... Serial Protocol SCL SDA Stand- Data START by condition valid EEPROM address Control byte Ackn Data byte Data Data/ STOP acknowledge change condition valid Mode control Read/ bits NWrite R/NW Ackn Data byte Ackn U3280M Stand- by Ackn STOP 9 ...
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... If the device is still busy with the write cycle, it will not return an acknowledge and the master has to generate a STOP condition or perform further acknowledge polling sequences. If the cycle is complete, the device returns an acknowledge and the master can proceed with the next read or write cycle. U3280M 10 16-bit matrix. To read and write 4688D–RFID–03/07 ...
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... The master can terminate the read operation after every byte by not responding with an acknowledge (N) and by issuing a STOP condition. 4688D–RFID–03/07 Control byte A Data byte 1 Control byte A Data byte 1 Control byte A STOP Row address LB(R) HB( Row address HB(R) LB(R) A STOP A Data byte 2 A STOP R/ R/ U3280M LSB 0 LSB 0 11 ...
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... The EEPROM with the serial interface has reset circuitry on-chip. In systems with microcontrol- lers that have their own reset circuitry for power-on reset, watchdog reset or brown-out reset, it may be necessary to bring the U3280M into a known state independently of the internal reset. This is performed by reading one byte without acknowledging and then generating a STOP condition ...
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... Note: 5.2.5 Power-on Reset, NRST The U3280M transponder front end starts working with the applied field. For the digital circuits like the EEPROM serial interface and registers there is reset circuitry. A reset is generated by a power-on condition at V applied at the NRST-pin. ...
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... The antenna coil must be connected with a capacitor as a parallel LC resonant circuit to the Coil 1 and Coil 2 pins of the IC. The resonance frequency f range of 100 kHz to 150 kHz. The correct LC combination can be calculated with the following formula ----------------------------------------------- - A C Figure 5-1. Example: Antenna frequency -------------------------------------------------------------------------- - A 2.2 nF U3280M Antenna Circuit Connection L = 125 kHz, capacitor 737 µH 2 ...
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... Value 180 Symbol Min. Typ. V 2.0 Batt V – Batt V DDB 2.6 2.9 DDC 400 Rdp I Rdp U3280M Unit °C °C °C Unit K/W Max. Unit 6 3 µA 0.4 µA 500 µA 1200 µA 300 µA 350 µA 15 ...
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... Output HIGH current V Serial Interface I/O Pins SCL and SDA Input LOW voltage Input HIGH voltage Input leakage current V Output LOW current Output HIGH current V V U3280M –40°C to 85°C unless otherwise specified amb Pin > 1.8V DD > 1. 0.5 mA Batt > ...
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... Power-on reset V NRST VIl < 0.2 V 4688D–RFID–03/ –40°C to 85°C unless otherwise specified amb Pin < 0.7 V coilGap DC > coilGap DC = 6.5V Batt = 25 C amb = DDrise DD U3280M Symbol Min. Typ. Max 100 SCL t 4.7 LOW t 4.0 HIGH t 1000 R t 300 F t 4.7 ...
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... Figure 9-1. Figure 9-2. Figure 9-3. U3280M 18 Typical Reset Delay After Switching V 600 500 400 300 200 100 0 1.0 2.0 3.0 V (V) DD Typical Reset Delay After Switching V 5.5 5.0 4.5 4.0 3.5 3.0 2.5 1.0 2.0 3 Rise Time to Ensure Power-on Reset ...
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... Ordering Information Extended Type Number U3280M-NFBY U3280M-NFBG3Y 11. Package Information 4688D–RFID–03/07 Package Remarks SSO16 Tube, Pb-free SSO16 Taped and reeled, Pb-free U3280M 19 ...
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... Please note that the following page numbers referred to in this section refer to the specific revision mentioned, not to this document. Revision No. 4688D-RFID-03/07 4688C-RFID-09/05 4688B-RFID-12/04 U3280M 20 History Put datasheet in a new template Pb-free logo on page 1 deleted Section 5.1 "EEPROM Operating Modes” on page 10 changed ...
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... Disclaimer: The information in this document is provided in connection with Atmel products. No license, express or implied, by estoppel or otherwise, to any intellectual property right is granted by this document or in connection with the sale of Atmel products. EXCEPT AS SET FORTH IN ATMEL’S TERMS AND CONDI- TIONS OF SALE LOCATED ON ATMEL’S WEB SITE, ATMEL ASSUMES NO LIABILITY WHATSOEVER AND DISCLAIMS ANY EXPRESS, IMPLIED OR STATUTORY WARRANTY RELATING TO ITS PRODUCTS INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT ...