USB-B1 User Manual V1.1
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1 USB-B1 User Manual V1.1 Table of Contents 1 Introduction Device Overview System Overview Connectors USB Connector J External Antenna Connector (J10) External / PCB Antenna Selection Connectors J8 and J IO and Peripherals Configuration Header Electrical Characteristics Test Conditions Absolute Maximum Ratings Operating Conditions GPIO Antenna Output Flash IDAC Parameters Example Measurement (Error and Offset) PWM ADC Comparator System and functionality Mechanical Dimensions
2 1 Introduction 1.1 Device Overview Features Applications Low cost RFID Reader with Mifare Classic, Ultralight and NTAG2 support Command interface via USB COM PORT with optional AES-128 encryption UART baud rate up to bps High transponder read and write speed -25 C to 85 C operating range 4 configurable GPIOs with interrupts 3 configurable PWMs Comparator ADC Current Output DAC AES-128 encryption engine Multiple internal reference voltages RoHS compliant Access control Monitoring goods Approval and monitoring consumables Pre-payment systems Managing resources Connection-less data storage systems Evaluation and development of RFID systems Description The USB-B1 module is an expansion of the RFID B1 module - the second in an evolving family of 13.56MHz sub assemblies from Eccel Technology Ltd (IB Technology). The product is designed with both embedded applications and computing / PLC platforms in mind. This product is an ideal design choice if the user wishes to add RFID capability to their design quickly and without requiring extensive RFID and embedded software expertise and time. An on board low power ARM microcontroller handles the RFID configuration setup and provides the user with a powerful yet simple command interface to facilitate fast and easy read/write access to the memory and features of the various transponders supported by this module. 2
3 1.2 System Overview The USB-B1 device is an extension of our RFID B1 module. Below, In Figure 1.1 the System Diagram is presented. 5V to 3.3V Voltage Converter PCB RFID Antenna +3.3V USB Type B Connector (J11) FTDI FT234XD USB to Com Port Converter UART RFID B1 Module ANT Signals RFID Antenna Switch (J8 and J9) +5V IO + Peripherals Header Connector External RFID Antenna Connector (J10) Figure 1.1 System Diagram 3
4 1.3 Connectors Picture 1-1 In Picture 1-1 there are marked connectors available for the user when working with the USB-B1 device USB Connector J11 The device provides communication and power via USB J11 connector. It is a micro USB type B connector. The USB port, connected to the FTDI FT234XD chip, provides USB to COM Port functionality. The user can configure the COM Port with a baud rate up to the maximum allowed by the RFID B1 module External Antenna Connector (J10) The user has the option to work with an external RFID antenna connected to the USB-B1 device. Connector J10 is where to plug in an external antenna. Eccel Technology Ltd provides a variety of RFID antennas which the user can use together with this device. 4
5 1.3.3 External / PCB Antenna Selection Connectors J8 and J9 To switch between the PCB antenna and an external antenna, two jumpers have to be used with the J8 and J9 connectors IO and Peripherals Configuration Header The device PCB connects the pins on this header to all IOs and peripherals provided by the onboard RFID B1 module. Also, available are pins facilitating connection to an onboard buzzer, button and LEDs for use as required To fulfil the needs required when connecting external electronics, a few pins are available providing +5V, +3.3V and GND signals. 2 Electrical Characteristics 2.1 Test Conditions Typical device parameters were measured at an ambient temperature 22 C ±3 C and using a power supply of 5V ±5%. 2.2 Absolute Maximum Ratings Symbol Parameter Min Max Unit Notes T S Storage Temperature C V USBMAX USB Supply Voltage V V IOMAX Input Pin Voltage V I IOMAX Output Pin Current 0 6 ma I ANT ANT1 and ANT2 Current ma Table 2.1 Maximum continuous current. This depends upon the impedance of the circuit between ANT1 and ANT2 at 13.56MHz. I 3V3OUT +3.3V Output Current ma This parameter is also limited by the USB Power Supply current limit. 5
6 2.3 Operating Conditions Symbol Parameter Min Max Unit T O Ambient Temperature C V USB USB Supply Voltage V V 3V3 +3.3V Generated Voltage V 2.4 GPIO Table 2.2 Symbol Parameter Min Typ Max Unit Notes V IOIL Input Low Voltage 0.3V 3V3 V V IOIH Input High Voltage 0.7V 3V3 V I IOMAX Output Pin Current ± 6 ma I IOLEAK Input Leakage Current ± 0.1 ± 40 na High impedance IO connected to V 3V3 or GND. R IOESD Internal ESD Series Resistor 2.5 Antenna Output 200 Ω V IOHYST IO Pin Histeresis 0.1V 3V3 V Table 2.3 Symbol Parameter Min Typ Max Unit Notes f ANT Antenna Signal Frequency MHz ±30 ppm (-20 C - 70 C). f ANTAG Antenna Signal Frequency Aging 0 3 ppm At 25 C. V ANTH Antenna High Level Output Voltage V 3V V I ANT = 80mA. V ANTL Antenna Low Level Output Voltage 0.64 V I ANT = 80mA. I ANT ANT1 and ANT2 Current ma Maximum continuous current. This depends upon the impedance of the circuit between ANT1 and ANT2 at 13.56MHz. Table 2.4 6
7 2.6 Flash Symbol Parameter Min Typ Max Unit Notes C FE Flash Erase Cycles Before Failure cycles T FDR Flash Data Retention Time 10 years For ambient temperature < 85 C 20 years For ambient temperature < 70 C Table IDAC Parameters Precision Range No Range [µa] Step Size [na] Nominal Current [µa] Current drop at Vdd mv [%] IDAC Parameters Source Temperature coefficient [na/ C] Table 2.6 Voltage coefficient [na/v] Current drop at 200 mv [%] Sink Temperature coefficient [na/ C] Voltage coefficient [na/v] 0 < 0 ; 1.6 > ( 1.6 ; 4.7 > ( 4.7 ; 16 > ( 16 ; 64 >
8 Figure 2.1 Source Current 8
9 Figure 2.2 Sink Current 9
10 2.7.2 Example Measurement (Error and Offset) Range 0 - Error [%] vs Curent [na] Figure kΩ Sourcing Range 1 - Error [%] vs Curent [ua] Figure kΩ Sourcing 10
11 Range 2 - Error [%] vs Curent [ua] Figure kΩ Sourcing Range 3 - Error [%] vs Curent [ua] Figure kΩ Sourcing 11
12 Range 0 - Error [%] vs Curent [na] Figure kΩ Sinking Range 1 - Error [%] vs Curent [ua] Figure kΩ Sinking 12
13 Range 2 - Error [%] vs Curent [ua] Figure kΩ Sinking Range 3 - Error [%] vs Curent [ua] Figure kΩ Sinking 13
14 Range 0 - Error [%] vs Curent [na] Figure MΩ Sourcing Range 0 - Error [%] vs Curent [na] Figure MΩ Sinking 14
15 2.8 PWM PWM Parameters Period Frequency Minimum Maximum Minimum Maximum Maximum Error [µs] [s] [Hz] [khz] [%] Table ADC Symbol Parameter Min Typ Max Unit Notes V ADCIN Input Voltage Range V Internal 2.5V reference voltage used. I ADCIN Input Current 100 na C ADCIN Input Capacitance 2 pf R ADCIN Input On Resistance 1 MΩ Table Comparator Symbol Parameter Min Typ Max Unit Notes V CMPIN Input Voltage Range 0 V 3V3 V V CMPOFST Offset Voltage mv V CMPHYST Hysteresis 50 mv Table
16 3 System and functionality From the system and functionality point of view, the USB-B1 device gives the same features as the RFID B1 module, and the user should refer to RFID B1 User Manual when working with USB-B1. The FTDI chip expands communication interface to the on-board RFID B1 module and allows the board to be connected to a computer and communicate with the device via a USB Com Port. Most systems have built-in drivers for such a Com Port. 4 Mechanical Dimensions Figure
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