ACS ACR1255U-J1 Reference guide

Subject to change without prior notice [email protected]k

www.acs.com.hk

Reference Manual V1.07

ACR1255U-J1

Secure Bluetooth

®

NFC Reader

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Revision History

Release Date Revision Description Version Number

2015-09-07 ● Initial Release 1.00

2016-02-02

● Updated Section 2.0 Features

● Updated Section 4.1.2 Battery Life

● Updated Section 4.5.1 Keys

● Updated Section 4.5.3 Status LED

● Updated Section 4.5.4 Buzzer

● Updated Section 5.3 Authentication

● Updated Section 6.7.2 Get Serial Number

● Updated Section 6.7.16 Sleep Mode Option

● Updated Section 6.6.18 Read Tx Power

Value

1.01

2016-06-06

● Updated Section 5.6.5 Notify Card Status

Command

● Updated Section 6.2.1 ATR Generation

● Updated Section 6.4.1 Load Authentication

Keys

● Updated Section 6.7.6 Set LED and Buzzer

Status Indicator Behavior

● Updated Section 6.7.7 Read LED and

Buzzer Status Indicator Behavior

● Updated Section 6.7.8 Set Automatic PICC

Polling

● Updated Section 6.7.10 Set PICC Operating

Parameter

● Updated Section 6.7.11 Read PICC

Operating Parameter

● Updated Section 6.7.12 Set Auto PPS

● Updated Section 6.7.13 Read Auto PPS

● Updated Section 6.7.16 Sleep Mode Option

● Updated Section 6.7.17 Change Tx Power

Command

● Updated Section 6.7.18 Read Tx Power

Value

● Added Section 6.7.19 Customer Master Key

Rewrite

1.02

2016-09-16 ● Updated Product Marketing Name 1.03

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Release Date Revision Description Version Number

2017-01-10

● Updated format of commands and

examples

● Added Example of a Mutual Authentication

Communication (section 5.7.1)

● Updated Table 5 value

● Deleted the PIN passcode description

● Updated Section 2.0 Features

● Updated Section 4.1.2 Battery Life

● Updated Section 5.6.5 Notify Card Status

Command

● Added Section 6.4 APDU Commands for

PCSC 2.0 Part 3

● Updated Section 6.7.4 LED Color

● Updated Section 6.7.17 Change Tx Power

Command

● Updated Section 6.7.18 Read Tx Power

Value

1.04

2017-10-02

● Updated Table 5: Service Handles and

UUID Information List

● Updated Section 5.3 Authentication

● Updated Section 5.7 Mutual Authentication

● Added Section 6.7 Accessing FeliCa Tags

1.05

2017-12-28 ● Updated Product Photo 1.06

2018-05-24

● Updated Section 5.2 Profile Selection

● Updated Section 5.6 Bluetooth

Communication Protocol

1.07

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Table of Contents

1.0. Introduction ............................................................................................................... 7

1.1. Symbols and Abbreviations ................................................................................................... 7

2.0. Features ..................................................................................................................... 8

3.0. System Block Diagram ............................................................................................. 9

4.0. Hardware Design ..................................................................................................... 12

4.1. Battery .................................................................................................................................. 12

4.1.1. Battery Charging ......................................................................................................... 12

4.1.2. Battery Life .................................................................................................................. 12

4.2. Bluetooth Interface ............................................................................................................... 12

4.3. USB Interface ...................................................................................................................... 12

4.3.1. Communication Parameters ....................................................................................... 12

4.3.2. Endpoints .................................................................................................................... 13

4.4. NFC Interface ...................................................................................................................... 14

4.4.1. Carrier Frequency ....................................................................................................... 14

4.4.2. Card Polling ................................................................................................................. 14

4.5. User Interface ...................................................................................................................... 14

4.5.1. Keys ............................................................................................................................ 14

4.5.2. Mode Selection Switch ................................................................................................ 15

4.5.3. Status LED .................................................................................................................. 15

4.5.4. Buzzer ......................................................................................................................... 16

5.0. Software Design ...................................................................................................... 17

5.1. Bluetooth Connection Flow .................................................................................................. 17

5.2. Profile Selection ................................................................................................................... 18

5.3. Authentication ...................................................................................................................... 19

5.4. Communication Profile ......................................................................................................... 20

5.5. Frame Format ...................................................................................................................... 20

5.5.1. Data Frame Format ..................................................................................................... 20

5.6. Bluetooth Communication Protocol ..................................................................................... 21

5.6.1. Card Power On ........................................................................................................... 21

5.6.2. Card Power Off ........................................................................................................... 22

5.6.3. Get Slot Status ............................................................................................................ 23

5.6.4. APDU Command ......................................................................................................... 24

5.6.5. Notify Card Status Command ..................................................................................... 26

5.6.6. Hardware Error Response .......................................................................................... 26

5.6.7. Escape Command ....................................................................................................... 27

5.7. Mutual Authentication and Encryption Protocol ................................................................... 28

5.7.1. Bluetooth Authentication Program Flow ..................................................................... 28

5.7.2. SPH_to_RDR_ReqAuth .............................................................................................. 29

5.7.3. RDR_to_SPH_AuthRsp1 ............................................................................................ 30

5.7.4. SPH_to_RDR_AuthRsp .............................................................................................. 31

5.7.5. RDR_to_SPH_AuthRsp2 ............................................................................................ 32

5.7.6. RDR_to_SPH_ACK (Error handling) .......................................................................... 32

6.0. Host Programming (PC-linked) API ....................................................................... 34

6.1. PC/SC API ........................................................................................................................... 34

6.1.1. SCardEstablishContext ............................................................................................... 34

6.1.2. SCardListReaders ....................................................................................................... 34

6.1.3. SCardConnect ............................................................................................................. 34

6.1.4. SCardControl .............................................................................................................. 34

6.1.5. SCardTransmit ............................................................................................................ 34

6.1.6. ScardDisconnect ......................................................................................................... 34

6.1.7. APDU Flow .................................................................................................................. 35

6.1.8. Escape Command Flow .............................................................................................. 36

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6.2. Contactless Smart Card Protocol ........................................................................................ 37

6.2.1. ATR Generation .......................................................................................................... 37

6.3. Pseudo APDU for Contactless Interface ............................................................................. 39

6.3.1. Get Data ...................................................................................................................... 39

6.4. APDU commands for PC/SC 2.0 Part 3 (version 2.02 or later) ........................................... 40

6.4.1. Command and Response APDU Format .................................................................... 40

6.4.2. Manage Session Command ........................................................................................ 41

6.4.3. Transparent Exchange Command .............................................................................. 45

6.4.4. Switch Protocol Command .......................................................................................... 48

6.4.5. PC/SC 2.0 Part 3 Example ......................................................................................... 49

6.5. PICC Commands for MIFARE Classic® (1K/4K) memory cards ........................................ 52

6.5.1. Load Authentication Keys ........................................................................................... 52

6.5.2. Authentication for MIFARE Classic (1K/4K) ............................................................... 53

6.5.3. Read Binary Blocks ..................................................................................................... 55

6.5.4. Update Binary Blocks .................................................................................................. 56

6.5.5. Value Block Operation (INC, DEC, STORE) .............................................................. 57

6.5.6. Read Value Block ........................................................................................................ 58

6.5.7. Copy Value Block ........................................................................................................ 59

6.6. Accessing PC/SC-compliant tags (ISO 14443-4) ................................................................ 60

6.7. Accessing FeliCa tags ......................................................................................................... 62

6.8. Peripherals Control .............................................................................................................. 62

6.8.1. Get Firmware Version ................................................................................................. 63

6.8.2. Get Serial Number ...................................................................................................... 64

6.8.3. LED Control ................................................................................................................. 64

6.8.4. LED Status .................................................................................................................. 65

6.8.5. Buzzer Control ............................................................................................................ 65

6.8.6. Set LED and Buzzer Status Indicator Behavior .......................................................... 66

6.8.7. Read LED and Buzzer Status Indicator Behavior ....................................................... 67

6.8.8. Set Automatic PICC Polling ........................................................................................ 67

6.8.9. Read Automatic PICC Polling ..................................................................................... 69

6.8.10. Set PICC Operating Parameter .................................................................................. 69

6.8.11. Read PICC Operating Parameter ............................................................................... 70

6.8.12. Set Auto PPS .............................................................................................................. 71

6.8.13. Read Auto PPS ........................................................................................................... 72

6.8.14. Antenna Field Control ................................................................................................. 72

6.8.15. Read Antenna Field Status ......................................................................................... 73

6.8.16. Sleep Mode Option ..................................................................................................... 73

6.8.17. Change Tx Power command ...................................................................................... 74

6.8.18. Read Tx Power Value ................................................................................................. 74

6.8.19. Customer Master Key Rewrite .................................................................................... 75

Appendix A. Access MIFARE DESFire tags (ISO 14443-3) ........................................... 77

List of Figures

Figure 1 : ACR1255U-J1 Architecture .................................................................................................... 9

Figure 2 : ACR1255U-J1 USB Communication Architecture ............................................................... 10

Figure 3 : Bluetooth

Protocol Stack ...................................................................................................... 11

Figure 4 : Keys on ACR1255U-J1 ........................................................................................................ 14

Figure 5 : LED Operation Status .......................................................................................................... 15

Figure 6 : Bluetooth Connection Flow .................................................................................................. 17

Figure 7 : Authentication Procedure ..................................................................................................... 19

Figure 8 : ACR1255U-J1 APDU Flow .................................................................................................. 35

Figure 9 : ACR1255U-J1 Escape Command Flow .............................................................................. 36

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List of Tables

Table 1 : Symbols and Abbreviations ..................................................................................................... 7

Table 2 : Estimated Battery Lifespan .................................................................................................... 12

Table 3 : USB Interface Wiring ............................................................................................................. 12

Table 4 : ACR1255U-J1’s Bluetooth Service ........................................................................................ 18

Table 5 : ACR1255U-J1 Service Handles and UUID Information List ................................................. 18

Table 6 : Command Code Summary .................................................................................................... 21

Table 7 : Response Code Summary .................................................................................................... 21

Table 8 : Summary of Mutual Authentication Commands .................................................................... 28

Table 9 : Mutual Authentication Error codes ........................................................................................ 33

Table 10 : MIFARE Classic® 1K Memory Map .................................................................................... 54

Table 11 : MIFARE Classic® 4K Memory Map .................................................................................... 54

Table 12 : MIFARE Ultralight® Memory Map ....................................................................................... 55

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1.0. Introduction

ACR1255U-J1 Secure Bluetooth® NFC Reader acts as an interface for the communication between a

computer/mobile device and a contactless smart card or NFC-enabled device. It establishes a uniform

interface from the computer/mobile device to the smart card for a wide variety of cards. By taking care

of the card’s particulars, it releases the computer software programmer from being responsible with

smart card operations’ technical details, which in many cases, are not relevant to the implementation

of a smart card system.

1.1. Symbols and Abbreviations

Abbreviation Description

ATR Attribute Request and Attribute Response

DEP Data Exchange Protocol Request and Data Exchange Protocol Response

DSL Deselect Request and Deselect Response

PSL Parameter Selection Request and Parameter Selection Response

RLS Release Request and Release Response

WUP Wakeup Request and Wakeup Response

DID Device ID

BS Sending bit duration

BR Receiving bit duration

PP Protocol Parameters

Table 1: Symbols and Abbreviations

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2.0. Features

• USB Full Speed Interface

• Bluetooth® Interface

• Plug and Play – CCID support brings utmost mobility

• Smart Card Reader:

o Contactless Interface:

 Read/Write speed of up to 424 Kbps

 Built-in antenna for contactless tag access, with reading distance of up to 60 mm

(depending on tag type)

 Supports ISO 14443 Part 4 Type A and B cards, MIFARE, FeliCa, and all 4 types of

NFC (ISO/IEC 18092) tags

 Built-in anti-collision feature (only one tag is accessed at any time)

 Supports AES-128 encryption algorithm (CBC ciphering mode)

 NFC Mode Supported:

▫ Card reader/writer mode

• Application Programming Interface:

o Supports PC/SC

o Supports CT-API (through wrapper on top of PC/SC)

• Built-in Peripherals:

o Two user-controllable bi-color LEDs

o User-controllable buzzer

• USB Firmware Upgradeability

1

• Supports Android™ 4.3 and later

2

• Supports iOS 5.0 and later

3

• Compliant with the following standards:

o EN 60950/IEC 60950

o ISO 14443

o ISO 18092

o USB Full Speed

o Bluetooth

o PC/SC

o CCID

o CE

o FCC

o RoHS 2

o REACH

o VCCI (Japan)

o TELEC (Japan)

o Microsoft® WHQL

1

Applicable under PC-linked mode

2

Uses an ACS-defined Android Library

3

Uses an ACS-defined iOS Library

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3.0. System Block Diagram

Figure 1: ACR1255U-J1 Architecture

ACR1255U-J1

NFC

Antenna

MCU

Bluetooth

Mobile

device or

Computer

LEDs

Buzzer

Bluetooth

Module

Switch

Rechargeable Battery

USB

Computer

NFC

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For USB communication architecture, the protocol between ACR1255U-J1 and other devices follow

the CCID protocol. All communications for NFC are PC/SC-compliant.

Figure 2: ACR1255U-J1 USB Communication Architecture

ACR1255U-J1 PC/SC

NFC Interface

USB Interface

(CCID)

PC/SC Layer

T=CL and T=1

Emulation

ISO 14443/ISO 18092

Interface

NFC

(Built-in Antenna)

Physical

Interface

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Bluetooth protocol stack architecture is as follows:

GAP Peripheral

Role Profile

SIM Access

Profile

GAP Peripheral

Bond Manager

GAP GATT

SMP

ATT

L2CAP

HCI

Link Layer

Physical Layer

Figure 3: Bluetooth

Protocol Stack

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4.0. Hardware Design

4.1. Battery

ACR1255U-J1 uses a rechargeable Lithium-ion battery, which has a capacity of 320 mAh.

4.1.1. Battery Charging

Once the battery of ACR1255U-J1 runs out, it may be charged in any of the following modes: OFF,

USB, Bluetooth; as long as it is connected to a power outlet.

4.1.2. Battery Life

The battery life is dependent on the usage of the device. Below is an estimate of the battery life

depending on the various work conditions:

Mode Estimated Battery Life

Working Mode 14 days*

(1)

Standby Mode 22 days

(2)

OFF Mode 2 years

Table 2: Estimated Battery Lifespan

Note: Results may vary as it depends on the smart card used.

(1)

In Bluetooth mode, run 10 operations per day with 1 minute operation run.

(2)

In Bluetooth mode, set sleep time as 60 seconds and wake up once per day.

4.2. Bluetooth Interface

ACR1255U-J1 uses Bluetooth as the medium to pair the device with computers and mobile devices.

4.3. USB Interface

The mini-USB port is used to connect the ACR1255U-J1 to the computer as battery charging port.

This port is also used for the ACR1255U-J1 to operate in PC-linked mode.

4.3.1. Communication Parameters

ACR1255U-J1 is connected to a computer through USB as specified in the USB Specification 2.0.

The ACR1255U-J1 is working in full speed mode, i.e. 12 Mbps.

Pin Signal Function

1 V

BUS

+5 V power supply for the reader

2 D- Differential signal transmits data between ACR1255U-J1 and computer

3 D+ Differential signal transmits data between ACR1255U-J1 and computer

4 GND Reference voltage level for power supply

Table 3: USB Interface Wiring

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4.3.2. Endpoints

ACR1255U-J1 uses the following endpoints to communicate with the host computer:

Control Endpoint

For setup and control purpose

Bulk OUT

For command to be sent from host to ACR1255U-J1

(data packet size is 64 bytes)

Bulk IN

For response to be sent from ACR1255U-J1 to host

(data packet size is 64 bytes)

Interrupt IN

For card status message to be sent from ACR1255U-J1 to host

(data packet size is 8 bytes)

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4.4. NFC Interface

The interface between ACR1255U-J1 and contactless card follows the ISO 14443 or ISO 18092

specifications with certain restrictions or enhancements aimed to increase the practical functionality of

the reader.

4.4.1. Carrier Frequency

The carrier frequency of ACR1255U-J1 is 13.56 MHz

4.4.2. Card Polling

ACR1255U-J1 automatically polls the contactless cards that are within the field. ISO 14443-4 Type A,

ISO 14443 Type B, FeliCa, Topaz, MIFARE, and NFC tags are supported.

4.5. User Interface

4.5.1. Keys

ACR1255U-J1 has 3 keys with locations shown in the figure below:

Key Description

ANT_KEY Wake up from sleep mode

MODEL_KEY Mode selection

UPDATE_KEY Enable boot loader

Figure 4: Keys on ACR1255U-J1

ANT_KEY

MODEL_KEY

UPDATE_KEY

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4.5.2. Mode Selection Switch

ACR1255U-J1 has three modes: USB, Off, and Bluetooth. User can select one mode at a time as a

data transmission interface.

Symbol Switch Active Mode

USB PC-linked

Off No power

Bluetooth Bluetooth

4.5.3. Status LED

ACR1255U-J1 has two bi-color LEDs to show the various operation statuses, where:

Figure 5: LED Operation Status

Mode Color LED Activity Status

Bluetooth

Mode

Blue

(LED1)

Off

• Reader is powered off

• No Bluetooth device paired

• Reader is in USB mode

Slow flash v1

4

The paired Bluetooth device is authenticated successfully and

is waiting for instructions

Slow flash v2

5

Bluetooth device is paired, card polling is on and no card is

present

Fast flash Data is being transferred between the reader and paired device

Fast – Slow flash

• Powered on

• Searching for devices to be paired with

On

• Bluetooth device is paired with the reader

• Card is present

4

LED is on for 500 ms, off for 500 ms

5

LED is on for 200 ms, off for 1800 ms

LED1

LED2

• Blue - Bluetooth Status

• Red - Battery Status

• Green – USB

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Mode Color LED Activity Status

Red

(LED2)

Off

• Battery is fully charged

• Reader is powered off

• The voltage of the battery is greater than 3.5 V and no

USB powered is being supplied

Slow flash Low battery

On Battery is charging

USB Mode

Green

(LED2)

Off Reader is powered off

Slow flash No card presented and the reader is waiting for instruction

Fast flash There is read/write access between the smart card and reader

On Card is present and the reader is waiting for instruction

Orange

6

(LED2)

On Device is powered on

Red

(LED1)

Off

• Battery is fully charged

• Reader is powered off

• The voltage of the battery is greater than3.5V and no USB

powered is being supplied

Slow flash Low battery

On Battery is charging

4.5.4. Buzzer

ACR1255U-J1 has a buzzer that is used to notify user of card polling, Bluetooth connection, sleep

mode, and low-battery status.

Buzzer Activity Event

One short beep Card has been detected or removed

One long beep Reader has been powered on

6

Green and Red both turned on

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5.0. Software Design

5.1. Bluetooth Connection Flow

The program flow of the Bluetooth connection is shown below:

Figure 6: Bluetooth Connection Flow

Yes

No

Bluetooth Start

(Reset/Power up)

Successful Connection?

No

Enable Service

Disconnect?

Reset

Power Off

Authentication

Smart Card Operation with Security Channel

Successful Authentication?

Yes

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5.2. Profile Selection

ACR1255U-J1 is a smart card reader that is designed to use Bluetooth technology as an interface to

transmit data. A customized service called Commands Communication with three pipes is used: the

first pipe is used for command request, the second pipe is for command response/card notification,

and the third pipe is for RFU.

Also, the reader’s current power consumption is significantly greater when the reader is operating in

Bluetooth mode, hence, a standard battery service is used to notify the paired device about the

current battery status. When there is a change in the battery status, the reader will notify the paired

device through a specific pipe. To simplify, the battery levels are divided into three groups: sufficient

battery (≥ 3.78 V), low battery (< 3.78 V and ≥ 3.68 V), and no battery (< 3.68 V).

Finally, to provide more reader information to the user, a customized Device Information service is

added. This can only be read manually, or by an application request. The characteristics include

Model Number, Serial Number, Firmware Revision, and Manufacturer Name.

Service UUID Pipe

Smart Card

3C4AFFF1-4783-3DE5-

A983-D348718EF133

Commands Request

3C4AFFF2-4783-3DE5-

A983-D348718EF133

Commands Response/Card

Notification

3C4AFFF3-4783-3DE5-

A983-D348718EF133

RFU

Battery 2A19 Battery Level

Device Information

2A23 System ID

2A24 Model Number

2A25 Serial Number

2A26 Firmware Revision

2A27 Hardware Revision

2A29 Manufacturer Name

Table 4: ACR1255U-J1’s Bluetooth Service

Attribute Name UUID Handle

DeviceName 2A00 03h

Send(Reader → Paired device)

3C4AFFF1-4783-

3DE5-A983-

D348718EF133

2Ah

Receive(Paired device → Reader)

3C4AFFF2-4783-

3DE5-A983-

D348718EF133

2Dh

BatteryLevel 2A19 14h

Manufacturer 2A29 1Eh

SerialNumber 2A25 16h

FW_Version 2A26 18h

ModelNumber 2A24 14h

Table 5: ACR1255U-J1 Service Handles and UUID Information List

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5.3. Authentication

Before any sensitive data can be loaded into ACR1255U-J1, the data processing server must be

authenticated by ACR1255U-J1 for the privilege to modify the secured data inside reader. In

ACR1255U-J1, a mutual authentication method is being used.

For better illustration, please refer to figure below (the picture below has omitted the bridging device

for simplicity and better illustration):

Figure 7: Authentication Procedure

Note: For more detailed information, you may contact an ACS sales representative

1.

Send authentication

request message

2.

Answer to the request

message

3.

Send authentication

response message

4.

Answer to the

authentication response

message

Transmitted

through the

bridging device

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5.4. Communication Profile

The communication profile should be:

Start byte + Len + Datablock + Check + Stop byte

Field Size (bytes) Description

Start byte

1 Value: 05h

Len

2 Len means the number of bytes in the Datablock field

Datablock

N

Data (the frame format is described in Frame Format

and

Encrypted)

Check

1 Check means the XOR values of bytes in Len and Datablock fields

Stop byte

1 Value: 0Ah

5.5. Frame Format

5.5.1. Data Frame Format

Command

HID Frame Length (bytes) Description

CmdMessageType

1 Commands

Length

2 Data length (Big Endian)

Slot

1 Default value: 00h

Seq

1 Sequence

Param

1 Parameter

Checksum

1 Checksum

Data

0-N Data

The frame format should be:

CmdMessageType + Length + Slot + Seq + Param + Checksum + Data

If the total command length, including identifier, length and payload, is greater than 20 bytes, then the

reader or the paired device will automatically divide it into several frames.

Response

HID Frame Length (bytes) Description

RspMessageType

1 Response

Length

2 Data length (Big Endian)

Slot

1 Default value: 00h

Seq

1 Sequence

Slot Status/Param

1 Slot Status/Parameter

Checksum

1 Checksum

Data

0-N Data

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