ACS ACR39x User manual

Subject to change without prior notice [e-mail]
www.acs.com.hk
Reference Manual V1.02
ACR39x
SmartCardReader

ACR39x – Reference Manual [e-mail]
Version 1.02 www.acs.com.hk
Page 2 of 35
Table of Contents
1.0. Introduction .............................................................................................................4
1.1. Reference Documents...........................................................................................................4
1.2. Symbols and Abbreviations...................................................................................................4
2.0. Features ...................................................................................................................5
3.0. Smart Card Support ................................................................................................6
3.1. MCU Cards............................................................................................................................6
3.2. Memory-based Smart Cards..................................................................................................6
4.0. USB Interface...........................................................................................................7
4.1. Communication Parameters..................................................................................................7
4.2. Endpoints...............................................................................................................................7
5.0. Contact Smart Card Interface.................................................................................8
5.1. Smart Card Power Supply VCC (C1) ....................................................................................8
5.2. Programming Voltage VPP (C6)............................................................................................8
5.3. Card Type Selection ..............................................................................................................8
5.4. Interface for Microcontroller-based Cards.............................................................................8
5.5. Card Tearing Protection.........................................................................................................8
6.0. Power Supply...........................................................................................................9
6.1. Status LED.............................................................................................................................9
7.0. USB Communication Protocol..............................................................................10
7.1. CCID Bulk-OUT Messages..................................................................................................12
7.1.1. PC_to_RDR_IccPowerOn...........................................................................................12
7.1.2. PC_to_RDR_IccPowerOff...........................................................................................12
7.1.3. PC_to_RDR_GetSlotStatus........................................................................................12
7.1.4. PC_to_RDR_XfrBlock.................................................................................................13
7.1.5. PC_to_RDR_GetParameters......................................................................................13
7.1.6. PC_to_RDR_ResetParameters..................................................................................13
7.1.7. PC_to_RDR_SetParameters......................................................................................14
7.2. CCID Bulk-IN Messages......................................................................................................16
7.2.1. RDR_to_PC_DataBlock..............................................................................................16
7.2.2. RDR_to_PC_SlotStatus..............................................................................................16
7.2.3. RDR_toPC_Parameters..............................................................................................17
8.0. Memory Card Command Set.................................................................................18
8.1. Memory Card – 1, 2, 4, 8, and 16 kilobit I2C Card..............................................................18
8.1.1. SELECT_CARD_TYPE ..............................................................................................18
8.1.2. SELECT_PAGE_SIZE................................................................................................18
8.1.3. READ_MEMORY_CARD............................................................................................19
8.1.4. WRITE_MEMORY_CARD..........................................................................................19
8.2. Memory Card – 32, 64, 128, 256, 512, and 1024 kilobit I2C Card......................................20
8.2.1. SELECT_CARD_TYPE ..............................................................................................20
8.2.2. SELECT_PAGE_SIZE................................................................................................20
8.2.3. READ_MEMORY_CARD............................................................................................21
8.2.4. WRITE_MEMORY_CARD..........................................................................................21
8.3. Memory Card – SLE4418/4428/5518/5528.........................................................................23
8.3.1. SELECT_CARD_TYPE ..............................................................................................23
8.3.2. READ_MEMORY_CARD............................................................................................23
8.3.3. READ_PRESENTATION_ERROR_COUNTER_MEMORY_CARD (Only SLE4428
and 5528)....................................................................................................................24
8.3.4. READ_PROTECTION_BIT.........................................................................................24
8.3.5. WRITE_MEMORY_CARD..........................................................................................25
8.3.6. WRITE_PROTECTION_MEMORY_CARD ................................................................26

ACR39x – Reference Manual [e-mail]
Version 1.02 www.acs.com.hk
Page 3 of 35
8.3.7. PRESENT_CODE_MEMORY_CARD (Only SLE4428 and SLE5528) ......................26
8.4. Memory Card – SLE4432/SLE4442/SLE5532/SLE5542 ....................................................28
8.4.1. SELECT_CARD_TYPE ..............................................................................................28
8.4.2. READ_MEMORY_CARD............................................................................................28
8.4.3. READ_PRESENTATION_ERROR_COUNTER_MEMORY_CARD (Only SLE4442
and SLE5542) .............................................................................................................29
8.4.4. READ_PROTECTION_BITS ......................................................................................29
8.4.5. WRITE_MEMORY_CARD..........................................................................................30
8.4.6. WRITE_PROTECTION_MEMORY_CARD ................................................................31
8.4.7. PRESENT_CODE_MEMORY_CARD (Only SLE4442 and SLE5542) ......................31
8.4.8. CHANGE_CODE_MEMORY_CARD (Only SLE4442 and SLE5542)........................32
9.0. Other commands accessed via PC_to_RDR_XfrBlock.......................................33
9.1. GET_READER_INFORMATION.........................................................................................33
Appendix A. Supported Card Types..............................................................................34
Appendix B. Response Error Codes.............................................................................35
List of Tables
Table 1 : Symbols and Abbreviations.....................................................................................................4
Table 2 : USB Interface Wiring...............................................................................................................7
Table 3 : Supported Card Types ..........................................................................................................34
Table 4 : Response Error Codes..........................................................................................................35

ACR39x – Reference Manual [e-mail]
Version 1.02 www.acs.com.hk
Page 4 of 35
1.0.Introduction
The ACR39x PC-linked Smart Card Reader acts as an interface for the communication between a
computer and a smart card. Different types of smart cards have different commands and different
communication protocols, which, in most cases, prevent direct communication between a smart card
and a computer. The ACR39x Smart Card Reader establishes a uniform interface from the computer
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. Reference Documents
The following related documents are available from www.usb.org
•Universal Serial Bus Specification 2.0 (also referred to as the USB specification), April 27,
2000
•Universal Serial Bus Common Class Specification 1.0, December 16, 1997
•Universal Serial Bus Device Class: Smart Card CCID Specification for Integrated Circuit(s)
Cards Interface Devices, Revision 1.1, April 22, 2005
The following related documents can be ordered through www.ansi.org
•ISO/IEC 7816-1; Identification Cards – Integrated circuit(s) cards with contacts - Part 1:
Physical Characteristics
•ISO/IEC 7816-2; Identification Cards – Integrated circuit(s) cards with contacts - Part 2:
Dimensions and Locations of the contacts
•ISO/IEC 7816-3; Identification Cards – Integrated circuit(s) cards with contacts - Part 3:
Electronic signals and transmission protocols
1.2. Symbols and Abbreviations
Abbreviation Description
ATR Answer-To-Reset
CCID Chip/Smart Card Interface Device
ICC Integrated Circuit Cards
IFSC Information Field Sized for ICC for protocol T=1
IFSD Information Field Sized for CCID for protocol T=1
NAD Node Address
PPS Protocol and Parameters Selection
RFU Reserved for future use1
TPDU Transport Protocol Data Unit
USB Universal Serial Bus
Table 1: Symbols and Abbreviations
1Must be set to zero unless stated differently.

ACR39x – Reference Manual [e-mail]
Version 1.02 www.acs.com.hk
Page 5 of 35
2.0.Features
•USB 2.0 Full Speed Interface
•Plug-and-Play – CCID support brings utmost mobility
•Smart Card Reader:
oSupports ISO 7816 Class A, B and C (5 V, 3 V, 1.8 V) cards
oSupports CAC (Common Access Card)
oSupports microprocessor cards with T=0 and T=1 protocol
oSupports memory cards
oSupports PPS (Protocol and Parameters Selection)
oFeatures Short Circuit Protection
•Application Programming Interface:
oSupports PC/SC
oSupports CT-API (through wrapper on top of PC/SC)
•Supports Android™ 3.1 and above2
•Compliant with the following standards:
oFIPS 201
oTAA
oEN60950/IEC 60950
oISO 7816
oCE
oFCC
oVCCI
oPC/SC
oCCID
oEMV 2000 Level 1
oPBOC
oMicrosoft®WHQL
oRoHS 2
oREACH
2PC/SC and CCID support are not applicable

ACR39x – Reference Manual [e-mail]
Version 1.02 www.acs.com.hk
Page 6 of 35
3.0.Smart Card Support
3.1. MCU Cards
The ACR39x is a PC/SC-compliant smart card reader that supports ISO 7816 Class A, B and C (5 V,
3 V, and 1.8 V) smart cards. It also works with MCU cards following either the T=0 and T=1 protocol.
The card ATR indicates the specific operation mode (TA2 present; bit 5 of TA2 must be 0) and when
that particular mode is not supported by the ACR39x, it will reset the card to negotiable mode. If the
card cannot be set to negotiable mode, the reader will then reject the card.
When the card ATR indicates the negotiable mode (TA2 not present) and communication parameters
other than the default parameters, the ACR39x will execute the PPS and try to use the communication
parameters that the card suggested in its ATR. If the card does not accept the PPS, the reader will
use the default parameters (F=372, D=1).
For the meaning of the aforementioned parameters, please refer to ISO 7816-3.
3.2. Memory-based Smart Cards
ACR39x works with several memory-based smart cards such as:
•Cards following the I2C bus protocol (free memory cards) with maximum 128 bytes page with
capability, including:
oAtmel®: AT24C01/02/04/08/16/32/64/128/256/512/1024
oSGS-Thomson: ST14C02C, ST14C04C
oGemplus: GFM1K, GFM2K, GFM4K, GFM8K
•Cards with intelligent 1 KB EEPROM with write-protect function, including:
oInfineon®: SLE4418, SLE4428, SLE5518 and SLE5528
•Cards with intelligent 256-byte EEPROM with write-protect function, including:
oInfineon®: SLE4432, SLE4442, SLE5532 and SLE5542

ACR39x – Reference Manual [e-mail]
Version 1.02 www.acs.com.hk
Page 7 of 35
4.0.USB Interface
4.1. Communication Parameters
The ACR39x is connected to a computer through USB as specified in the USB Specification 2.0. The
ACR39x is working in full speed mode, i.e. 12 Mbps.
Pin Signal Function
1 VBUS +5 V power supply for the reader
2 D- Differential signal transmits data between ACR39x and PC
3 D+ Differential signal transmits data between ACR39x and PC
4 GND Reference voltage level for power supply
Table 2: USB Interface Wiring
4.2. Endpoints
The ACR39x 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 ACR39x.
(Data packet size is 64 bytes)
Bulk-IN For response to be sent from ACR39x to host.
(Data packet size is 64 bytes)
Interrupt-IN For card status message to be sent from ACR39x to host.
(Data packet size is 8 bytes)

ACR39x – Reference Manual [e-mail]
Version 1.02 www.acs.com.hk
Page 8 of 35
5.0.Contact Smart Card Interface
The interface between the ACR39x and the inserted smart card follows the specification of ISO 7816-
3 with certain restrictions or enhancements to increase the practical functionality of ACR39x.
5.1. Smart Card Power Supply VCC (C1)
The current consumption of the inserted card must not be higher than 50 mA.
5.2. Programming Voltage VPP (C6)
According to ISO 7816-3, the smart card contact C6 (VPP) supplies the programming voltage to the
smart card. Since all common smart cards in the market are EEPROM-based and do not require the
provision of an external programming voltage, the contact C6 (VPP) has been implemented as a
normal control signal in the ACR39x. The electrical specifications of this contact are identical to those
of the signal RST (at contact C2).
5.3. Card Type Selection
The controlling PC must always select the card type through the proper command sent to the ACR39x
prior to activating the inserted card. This includes both the memory cards and MCU-based cards.
For MCU-based cards, the reader allows to select the preferred protocol, T=0 or T=1. However, this
selection is only accepted and carried out by the reader through the PPS when the card inserted in
the reader supports both protocol types. Whenever an MCU-based card supports only one protocol
type, T=0 or T=1, the reader automatically uses that protocol type, regardless of the protocol type
selected by the application.
5.4. Interface for Microcontroller-based Cards
For microcontroller-based smart cards, only the contacts C1 (VCC), C2 (RST), C3 (CLK), C5 (GND)
and C7 (I/O) are used. A frequency of 4.8 MHz is applied to the CLK signal (C3).
5.5. Card Tearing Protection
The ACR39x provides a mechanism to protect the inserted card when it is suddenly withdrawn while it
is powered up. The power supply to the card and the signal lines between the ACR39x and the card is
immediately deactivated when the card is being removed.However, as a rule to avoid any electrical
damage, a card should only be removed from the reader while it is powered down.
Note: The ACR39x never switches on the power supply to the inserted card by itself. The controlling
computer through the proper command sent to the reader must explicitly do this.

ACR39x – Reference Manual [e-mail]
Version 1.02 www.acs.com.hk
Page 9 of 35
6.0.Power Supply
The ACR39x requires a voltage of 5 V DC, 100 mA, regulated, power supply. The ACR39x gets
power supply from the computer (through the cable supplied along with each type of reader).
6.1. Status LED
The LED indicates the activation status of the smart card interface:
•Flashing slowly (turns on 200 ms every 2 seconds)
Indicates ACR39x is powered up and in the standby state. Either the smart card has not
been inserted or the smart card has not been powered up (if it is inserted).
•Lighting up
Indicates power supply to the smart card is switched on, i.e., the smart card is activated.
•Flashing quickly
Indicates there are communications between ACR39x and smart card.

ACR39x – Reference Manual [e-mail]
Version 1.02 www.acs.com.hk
Page 10 of 35
7.0.USB Communication Protocol
ACR39x shall interface with the host through the USB connection. A specification, namely CCID, has
been released within the industry defining such a protocol for the USB chip-card interface devices.
CCID covers all the protocols required for operating smart cards.
The configurations and usage of USB endpoints on ACR39x shall follow CCID Rev 1.0 Section 3.
An overview is summarized below:
1. Control Commands are sent on control pipe (default pipe). These include class-specific
requests and USB standard requests. Commands that are sent on the default pipe report
information back to the host on the default pipe.
2. CCID Events are sent on the interrupt pipe.
3. CCID Commands are sent on BULK-OUT endpoint. Each command sent to ACR39x has an
associated ending response. Some commands can also have intermediate responses.
4. CCID Responses are sent on BULK-IN endpoint. All commands sent to ACR39x have to be
sent synchronously (e.g., bMaxCCIDBusySlots is equal to 01h for ACR39x).
The ACR39x supported CCID features are indicated in its Class Descriptor:
Offset Field Size Value Description
0 bLength 1 Size of this descriptor, in bytes.
1 bDescriptorType 1 CCID Functional Descriptor type.
2 bcdCCID 2 CCID Specification Release Number in
binary-coded decimal.
4 bMaxSlotIndex 1 One slot is available on ACR39x.
5 bVoltageSupport 1 ACR39x can supply 1.8 V, 3 V, and 5 V to
its slot.
6 dwProtocols 4 ACR39x supports T=0 and T=1 protocol.
10 dwDefaultClock 4 Default ICC clock frequency is 4.8 MHz.
14 dwMaximumClock 4 Maximum supported ICC clock frequency
is 4.8 MHz.
18 bNumClockSupported 1 Does not support manual setting of clock
frequency.
19 dwDataRate 4 Default ICC I/O data rate is 12918 bps.
23 dwMaxDataRate 4 Maximum supported ICC I/O data rate is
826 Kbps.
27 bNumDataRatesSupported 1 Does not support manual setting of data
rates.
28 dwMaxIFSD 4 Maximum IFSD supported by ACR39x for
protocol T=1 is 247.
32 dwSynchProtocols 4 ACR39x does not support synchronous
card.
36 dwMechanical 4 ACR39x does not support special
mechanical characteristics.