Essel Technology RFID A1 Manuel utilisateur

RFID A1 Module User Manual

V1.183

Table of Contents

1 Introduction...............................................................................................................................................................4

1.1 Device Overview ................................................................................................................................................4

1.2 Pinout.................................................................................................................................................................5

1.3 Application.........................................................................................................................................................6

2 Electrical Characteristics............................................................................................................................................7

2.1 Test Conditions ..................................................................................................................................................7

2.2 Absolute Maximum Ratings...............................................................................................................................7

2.3 Operating Conditions.........................................................................................................................................7

2.4 Current Consumption ........................................................................................................................................7

2.5 GPIO...................................................................................................................................................................8

2.6 Antenna Output.................................................................................................................................................8

2.7 Communication Buses .......................................................................................................................................9

2.8 Flash...................................................................................................................................................................9

3 System .....................................................................................................................................................................10

3.1 Overview..........................................................................................................................................................10

3.2 Modules...........................................................................................................................................................12

3.2.1 Core..........................................................................................................................................................12

3.2.2 RFID..........................................................................................................................................................12

3.2.3 Communication System...........................................................................................................................12

3.2.4 Power Manager .......................................................................................................................................12

3.3 Memory Map...................................................................................................................................................13

3.3.1 Result Register.........................................................................................................................................15

3.3.2 Command Register ..................................................................................................................................16

3.3.3 Command Parameters Register...............................................................................................................16

3.3.4 Tag UID Register ......................................................................................................................................17

3.3.5 Tag Type Register.....................................................................................................................................17

3.3.6 Tag UID Size Register ...............................................................................................................................18

3.3.7 Data Buffer...............................................................................................................................................18

3.3.8 Password Register....................................................................................................................................18

3.3.9 AES Initialization Vector Register.............................................................................................................19

3.3.10 AES Key Register ......................................................................................................................................19

3.3.11 Authentication Key / Password Register .................................................................................................20

3.3.12 User Memory...........................................................................................................................................20

4 Functional Description.............................................................................................................................................21

4.1 Overview..........................................................................................................................................................21

4.2 Commands.......................................................................................................................................................21

4.2.1 Get UID and Type (0x01)..........................................................................................................................23

4.2.2 Read Block (0x02) ....................................................................................................................................24

4.2.3 Write Block (0x03) ...................................................................................................................................25

4.2.4 Read Data Block (0x04)............................................................................................................................26

4.2.5 Write Data Block (0x05)...........................................................................................................................27

4.2.6 Read Page (0x06) .....................................................................................................................................28

4.2.7 Write Page (0x07) ....................................................................................................................................29

4.2.8 Encrypt Data (0x08) .................................................................................................................................30

4.2.9 Decrypt Data (0x09).................................................................................................................................32

4.2.10 Read Value (0x0A)....................................................................................................................................34

4.2.11 Write Value (0x0B)...................................................................................................................................35

4.2.12 Increment Value (0x0C) ...........................................................................................................................36

4.2.13 Decrement Value (0x0D) .........................................................................................................................37

4.2.14 Restore Value (0x0E)................................................................................................................................38

4.2.15 Transfer Value (0x0F)...............................................................................................................................39

4.2.16 Recover Value (0x10)...............................................................................................................................40

4.2.17 Get Version (0x11) ...................................................................................................................................41

4.2.18 Read Signature (0x12)..............................................................................................................................42

4.2.19 Configure UID (0x13) ...............................................................................................................................42

4.2.20 Read Counter (0x14)................................................................................................................................44

4.2.21 Increment Counter (0x15) .......................................................................................................................45

4.2.22 Check Tearing Event (0x16) .....................................................................................................................46

4.2.23 Password Authentication (0x17) .............................................................................................................47

4.2.24 Halt (0x18) ...............................................................................................................................................48

4.2.25 Calculate CRC (0x19)................................................................................................................................48

4.2.26 Copy Data (0x1A) .....................................................................................................................................50

4.2.27 Unlock (0x1B)...........................................................................................................................................50

4.2.28 Lock (0x1C)...............................................................................................................................................51

4.2.29 Get Module Version (0x1D) .....................................................................................................................51

4.2.30 Reset to Default (0x1E)............................................................................................................................51

4.3 Power Down Mode..........................................................................................................................................52

4.4 Memory Locking ..............................................................................................................................................52

5 Communication Interface........................................................................................................................................53

5.1 nBUSY line........................................................................................................................................................53

5.2 SPI Bus..............................................................................................................................................................53

5.2.1 Bus signals and timings requirements.....................................................................................................53

5.2.2 Exchanging data (reading or reading and writing) ..................................................................................54

5.2.3 Command processing ..............................................................................................................................55

5.3 I2C Bus .............................................................................................................................................................56

5.3.1 I2C Address Construction ........................................................................................................................56

5.3.2 Writing to the memory............................................................................................................................56

5.3.3 Reading from the memory ......................................................................................................................57

6 Mechanical...............................................................................................................................................................58

6.1 Dimensions ......................................................................................................................................................58

6.2 Recommended Footprint ................................................................................................................................59

1Introduction

1.1 Device Overview

Features

Low cost RFID Reader with Mifare

Classic, Ultralight and NTAG2 support

Command interface via I2C and SPI

I2C speed up to 400kHz

SPI speed up to 500kHz

Compact form factor

Castellated SMT pads for easy and

reliable PCB mounting

High transponder read and write

speed

Low power design

Single operating voltage: 2.5V to 3.6V

-25°C to 85°C operating range

AES-128 encryption engine

RoHS compliant

Applications

Access control

Monitoring goods

Approval and monitoring

consumables

Pre-payment systems

Managing resources

Connection-less data storage

systems

Description

The RFID A1 module is the first in an evolving family of 13.56MHz

sub assemblies from Eccel Technology Ltd (IB Technology). The

product is designed with embedded applications 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.

The module simply requires a single power and GND connection

from the user PCB, along with two connections to an antenna.

Eccel Technology Ltd (IB Technology) provide a range of suitable

antennas designed for use with this module.

1.2 Pinout

Table 1.1

Pin Number Symbol Type Description

1 GND Ground

2 nRESET

Digital input with

pull-up

Reset input signal (active low). This pin requires no external pull-up / down resitor

unless the module is used in noisy environments, in which case connection of an

external pull-up resistor combined with HF filter is recommended.

3 nBUSY

Digital push-pull

output

Busy signal output indicating the device is working and the user should wait with

any communication (active low) except status reading.

4 nPWRDN

Digital input with

no pull resistors

Power Down Request input signal (active low). This pin has no pull-up/down

resistor and should NOT be left floating. For power optimization it is

recommended that the user drives this pin with a push-pull GPIO or similar.

5 I2C SDA

Digital input-

outut with no pull

resistors

Data input / output for the I2C Interface Bus. This pin has no pull-up / down

resistor and should not be left floating. When using I2C communication external

pull-up resistor is required matching the I2C bus requirements.

6 I2C SCL

Digital input with

no pull resistors

Clock input for the I2C Interface Bus. This pin has no pull-up/down resistor and

should not be left floating. External pull-up resistor is required matching the I2C

bus requirements.

7 SPI MISO

Digital push-pull

output

Master In Slave Out output for the Serial Peripheral Interface Bus.

8 SPI MOSI

Digital input with

no pull resistors

Master Out Slave In input for for the Serial Peripheral Interface Bus.

9 SPI CS

Digital input with

no pull resistors

Chip Select input for the Serial Peripheral Interface Bus. This pin has no pull-up /

down resistor and should not be left floating.

10 SPI CLK

Digital input with

no pull resistors

Clock input for the Serial Peripheral Interface Bus. This pin has no pull-up / down

resistor and should not be left floating.

11 GND Ground

12 GND Ground

13 I2C AD2

Digital input with

no pull resistors

Digital input for configuring the I2C Address bit 2. Value is sampled after the reset

or power up. This pin has no pull-up / down resistor and should not be left floating.

14 I2C AD1

Digital input with

no pull resistors

Digital input for configuring the I2C Address bit 1. Value is sampled after the reset

or power up. This pin has no pull-up / down resistor and should not be left floating.

15 I2C AD0

Digital input with

no pull resistors

Digital input for configuring the I2C Address bit 0. Value is sampled after the reset

or power up. This pin has no pull-up / down resistor and should not be left floating.

16 NOT USED - -

17 NOT USED - -

18 VDD Power supply pin

Power Supply pin. Low ESR capacitor with capacitance 10uF or higher should be

connected close to this pin.

19 GND Ground

20 ANT2 Analog output Antenna output.

21 ANT1 Analog output Antenna output.

22 GND Ground

1.3 Application

The RFID A1 module is specifically designed for embedded applications, where a fast or low pin count connection to

a host microcontroller is required. Fastest data exchange speed can be obtained by using the Serial Peripheral

Interface Bus. The lowest pin count connection can be achieved by using the I2C Bus. For the module to be a fully

functional RFID reader/writer it only requires connection to a power supply and antenna. Eccel Technology Ltd

manufactures a wide range of such antennas designed to give optimal performance with this module. Please contact

us for further details of our range of antennas.

2Electrical Characteristics

2.1 Test Conditions

Typical device parameters have been measured at ambient temperature 22°C ±3°C and a power supply of 3.3V ±5%.

2.2 Absolute Maximum Ratings

Table 2.1

2.3 Operating Conditions

Table 2.2

2.4 Current Consumption

Table 2.3

Symbol Parameter Min Max Uni t Notes

TSStorage Temperature -40 150 °C Tested for 10'000 hours at 150°C.

VDDMAX Supply Voltage 0 3.8 V

VIOMAX Input Pin Voltage -0.3 VDD + 0.3 V

IIOMAX Output Pin Current 0 6 mA

IANT ANT1 and ANT2 Current 0 100 mA

Maximum continuous current. This depends upon the impedance of the

circuit between ANT1 and ANT2 at 13.56MHz.

Symbol Parameter Min Max Unit

TOAmbient Temperature -25 85 °C

VDD Supply Voltage 2.5 3.6 V

Symbol Parameter Typ Max Unit Comment

0.9 1.1 µA T = 25°C, Vdd = 3.3V.

1.8 µA Full range of temperature and power supply voltage.

20 40 nA T = 25°C, Vdd = 3.3V.

400 nA Full range of temperature and power supply voltage.

ITX Power Up Current 14 24 mA T = 25°C, Vdd = 3.3V, 50Ωantenna connected between ANT1 and ANT2.

ITXMAX Maximum Current 120 mA Maximum current consumed by the module in the worst conditions.

Iddle Current

IIDDLE

IPWRDN

Power Down State

Current

Current measurement was taken place with all digital input pins connected to Vdd. Pins number 16 and 17 was left

floating. Antenna was not connected except for the Power Up Current measurement and Maximum Current

measurement.

2.5 GPIO

Table 2.4

2.6 Antenna Output

Table 2.5

Symbol Parameter Min Typ Max Unit Notes

VIOIL Input Low Voltage 0.3VDD V

VIOIH Input High Voltage 0.7VDD V

IIOMAX Output Pin Current ± 6mA

IIOLEAK Input Leakage Current ± 0.1 ± 40 nA High impedance IO connected to VDD or GND.

RIOESD

Internal ESD Series

Resistor

200 Ω

VIOHYST IO Pin Histeresis 0.1VDD V

Symbol Parameter Min Typ Max Unit Notes

fANT

Antenna Signal

Frequency

13.56 MHz ±30 ppm (-20°C - 70°C).

fANTAG

Antenna Signal

Frequency Aging

0 3 ppm At 25°C.

VANTH

Antenna High Level

Output Voltage

VDD - 0.64 V VDD = 2.5V, IANT = 80mA.

VANTL

Antenna Low Level

Output Voltage

0.64 V VDD = 2.5V, IANT = 80mA.

IANT ANT1 and ANT2 Current 0 60 100 mA

Maximum continuous current. This depends upon the impedance of

the circuit between ANT1 and ANT2 at 13.56MHz.

2.7 Communication Buses

Table 2.6

2.8 Flash

Table 2.7

Symbol Parameter Min Typ Max Unit Notes

fI2CMAX

I2C Maximum Clock

Frequency

400 kHz

fSPIMAX

SPI Maximum Clock

Frequency

500 kHz

TCSCLK SPI CS To CLK Time Delay 2 µs

Minimum time delay between falling edge of Chip Select and first clock

edge.

TCSHMIN SPI CS high Minimum Time 50 µsMinimum time when CS is in HIGH state between SPI transmissions.

Symbol Parameter Min Typ Max Unit Notes

CFE

Flash Erase Cycles Before

Failure

20000 cycles

10 years For ambient temperature < 85°C

20 years For ambient temperature < 70°C

TFDR

Flash Data Retention Time

3System

3.1 Overview

The general overview of system components is shown in Figure 3.1. The system internally consists of four main parts:

CORE –the main processing part of the microcontroller firmware responsible for managing all system tasks,

parsing and the execution of commands received from the user’s master controller.

RFID –dedicated RFID IC together with its firmware drivers responsible for communication with the RFID tag.

COMMUNICATION SYSTEM –microcontroller’s peripherals (I2C and SPI) and its firmware drivers providing

communication functionality to the user.

POWER MANAGER –a subsystem responsible for managing power states and clocks in the module to

minimise power consumption during operation.

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