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U9280M-H Datasheet(PDF) 3 Page - ATMEL Corporation |
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U9280M-H Datasheet(HTML) 3 Page - ATMEL Corporation |
3 / 23 page 3 U9280M-H 4591A–RFID–03/03 Pin Description Pin Symbol Function 1 COIL1 Coil input 1, Pin to connect an LC antenna for communication and field supply 2 COIL2 Coil input 2, Pin to connect an LC antenna for communication and field supply 3 VBATT Power-supply voltage input to connect a battery 4VDD Power-supply voltage for the microcontroller and EEPROM. At this pin a capacitor (0.5 µF to 10 µF) must be connected to buffer the voltage during field supply and to block the V DD of the microcontroller. 5 BP40/SC/INT3 I/O-port line/serial clock line/INT3 input (falling edge sensitive) 6 BP53/INT3 I/O-port line/INT3 interrupt input (falling or rising edge sensitive) 7 BP50/INT6 I/O-port line/INT6 interrupt input (falling or rising edge sensitive) 8 OSC1/ROSC Oscillator- or external system-clock input/input for RC-oscillator resistor 9 OSC2 Oscillator output 10 BP60/T3O Bi-directional I/O-line/Timer 3 output/modulator output 11 BP63/T3I/INT5 I/O-port line/INT5 interrupt input/Timer 3 input/demodulator input 12 BP20/NTE BP20-I/O-port line/test mode input. This input is used to control the test modes. During POR it must not be connected with a low impedance to V DD. 13 BP23 I/O-port line 14 BP41/VMI I/O-port line/Voltage monitor input/Timer 2 input 15 BP42/T2O I/O-port line/Timer 2 output/modulator output 16 BP43/SD/INT3 I/O-port line/serial data line/INT3 input (falling edge sensitive) 17 VSS Circuit ground 18 FC Field clock output of the clock extractor 19 MOD Modulation input - front end. Must be connected to the modulator output T2O. 20 NGAP Gap detect output - front end. Must be connected to the demodulator input T3I. |
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