ACS ACR38x User manual

Subjectto change without prior notice
[e-mail]
www.acs.com.hk
CCID Reference Manual
ACR38x
Smart Card Reader

Document Title Here
Document Title Here
Document Title Here
ACR38x Reference Manual (CCID)
Version 6.02
Page 2 of 20
[e-mail]
www.acs.com.hk
Table of Contents
1.0. Introduction ..................................................................................................................3
2.0. Features ........................................................................................................................4
3.0. Smart Card Support.....................................................................................................5
3.1. MCU Cards ..................................................................................................................5
3.2. Memory-Based Sm art Cards .........................................................................................5
4.0. Smart Card Interface....................................................................................................6
4.1. Smart Card Power Supply VCC (C1)..............................................................................6
4.2. Programming Voltage VPP (C6) ....................................................................................6
4.3. Card Type Selection .....................................................................................................6
4.4. Interface for Microc ontroller-based Cards .......................................................................6
4.5. Card Tearing Protection ................................................................................................6
5.0. Power Supply ...............................................................................................................7
5.1. Status LED...................................................................................................................7
6.0. USB Interface................................................................................................................8
6.1. Comm unication Parameters ..........................................................................................8
6.2. Endpoints .....................................................................................................................8
7.0. Communication Protocol ............................................................................................9
8.0. Commands..................................................................................................................11
8.1. CCID Command Pipe Bulk-OUT Messages .................................................................. 11
8.1.1. PC_to_RDR_IccPowerOn ................................................................................... 11
8.1.2. PC_to_RDR_IccPowerOff ................................................................................... 11
8.1.3. PC_to_RDR_GetSlotStatus ................................................................................. 12
8.1.4. PC_to_RDR_XfrBlock ......................................................................................... 12
8.1.5. PC_to_RDR_GetParameters ............................................................................... 13
8.1.6. PC_to_RDR_ResetParameters ........................................................................... 13
8.1.7. PC_to_RDR_SetParameters ............................................................................... 14
8.1.8. CCID Bulk-IN Messages ..................................................................................... 16
8.1.9. RDR_to_PC_DataBlock ...................................................................................... 16
8.1.10. RDR_to_PC_SlotStatus ...................................................................................... 16
8.1.11. RDR_to_PC_Param eters .................................................................................... 17
8.2. Comm ands Accessed via PC_to_RDR_XfrBlock .......................................................... 18
8.2.1. GET_REA DER_INF ORMA TION .......................................................................... 18
Appendix A. Supported Card Types .................................................................................19
Appendix B. Response Error Codes.................................................................................20
Tables
Table 1. USB Interface Wiring.................................................................................................... 8

Document Title Here
Document Title Here
Document Title Here
ACR38x Reference Manual (CCID)
Version 6.02
Page 3 of 20
[e-mail]
www.acs.com.hk
1.0. Introduction
This document contains inform ation regarding the ACR38x using the P C/SC platform. The ACR38x
uses CCID interfac e to communicate with the USB port. CCID refers to the Device Class Speci fication
for USB Chip/Smart Card Interface Devic es that defines the communication protocol and commands
for the USB chip-card interface devices.
The ACR38x acts as an interface for the comm unication between a computer (for ex ample, a P C) and
a smart card. Different types of smart cards have different commands and different communication
protocols, which prevents, in most cases the direct communication between a smart card and a
computer. The ACR38x establishes a uniform interface from the computer to the smart card for a wide
variety of cards. By taking care of the card specific particulars, it releases the com puter software
programmer from getting i nvolved with the technical details of the smart card operation, which are not
relevant in many cases of the implementation of smart card system.
Note: Although the ACR38x is a true card reader/writer as it can read and write data from and to smart
cards. The terms reader or card reader will be used indifferently to refer to the ACR38x. These
designations are commonlyused for this kind of devices.

Document Title Here
Document Title Here
Document Title Here
ACR38x Reference Manual (CCID)
Version 6.02
Page 4 of 20
[e-mail]
www.acs.com.hk
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
oHas read and write support to all microprocessor cards with T=0 or T=1 protocols
oSupports memory cards:
I2C bus Protocol Cards (1K bits to 1024K bits)
Secure Memory Cards (Atmel AT88SC153 and AT88SC1608)
Memory Card with Secure Logic (AT88SC101/102/1003)
oSupports SLE 4404/06/18/28/32/36/42, SLE 5518/28/32/36/42, SLE 6636
oSupports PPS (Protocol and Parameters Selection)
oHas Short Circuit Protection
•Compliant with the following standards:
oEN60950/IEC60950
oPC/SC
oCCID
oRoHS
oCE
oFCC
oMicrosoft WHQL

Document Title Here
Document Title Here
Document Title Here
ACR38x Reference Manual (CCID)
Version 6.02
Page 5 of 20
[e-mail]
www.acs.com.hk
3.0. Smart Card Support
3.1. MCU Cards
ACR38x operates with any MCU card following either the T=0 or T=1 protocol.
3.2. Memory-Based Smart Cards
ACR38x works with several memory-based smart cards such as:
•Cards following the I2Cbus protocol (free memory cards) with maximum 128 bytes page with
capability, including:
Atmel: AT24C01/02/04/08/16/32/64/128/256/512/1024
SGS-Thomson: ST14C02C, ST14C04C
Gemplus: GFM1K, GFM2K, GFM4K, GFM8K
•Cards with secure memory IC with password and authentication, including:
Atmel: AT88SC153 and AT88SC1608
•Cards with intelligent 1k bytes EEPROM with write-protect function, including:
Infineon: SLE4418, SLE4428, SLE5518 and SLE5528
•Cards with intelligent 256 bytes EEPROM with write-protect function, including:
Infineon: SLE4432, SLE4442, SLE5532 and SLE5542
•Cards with ‘104’ type EEPROM non-reloadable token counter cards, including:
Infineon: SLE4406, SLE4436, SLE5536 and SLE6636
•Cards with Intelligent 416-Bit EEPROM with internal PIN check, including:
Infineon: SLE4404
•Cards with Security Logic with Application Zone(s), including:
Atmel: AT88SC101, AT88SC102 and AT88SC1003

Document Title Here
Document Title Here
Document Title Here
ACR38x Reference Manual (CCID)
Version 6.02
Page 6 of 20
[e-mail]
www.acs.com.hk
4.0. Smart Card Interface
The interface between the ACR38x and the inserted smart card follows the specifications of ISO
7816-3 with certain restrictions or enhancements to increase the practical functionality of ACR38x.
4.1. Smart Card Power Supply VCC (C1)
The current consumption of the inserted card must not be higher than 50 mA.
4.2. Programming Voltage VPP (C6)
According to ISO 7816-3, the smart card contact C6 (VPP) supplies the programmi ng voltage to the
smart card. Since all common smart cards in the market are EEPROM -based and do not requi re the
provision of an external programmi ng volt age, the contact C6 (VPP) has been implemented as a
normal cont rol signal in t he A CR38x. The electrical specifications of this contact are identical to those
of the signal RST (at contact C2).
4.3. Card Type Selection
The controlli ng PC has to select the card type always, through the proper command sent to the
ACR38x prior to activating the inserted card. This includes both the memory cards and MCU-based
cards.
For M CU-bas ed 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 s upports 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.
4.4. Interface for Microcontroller-based Cards
For microcontroll er-bas ed smart cards, only the contacts C1 (VCC), C2 (RS T), C3 (CLK), C5 (GND)
and C7 (I/O) are used. A frequency of 4 MHz is applied to the CLK signal (C3).
4.5. Card TearingProtection
The ACR38x provides a mechanism to protect the inserted card when it is suddenly withdrawn whil e it
is powered up. The power supply to the card and the signal lines between the A CR38x and the card is
immediat ely deactivated when the card is being removed. As a rule however, a card should only be
removed from the reader while it is powered down, to avoid any electrical damage.
Note :The ACR38x ne ver switches on the power supply to the inserted card by itself. The controlling
computer through the proper command sentto the reader mustexplicitly do this.

Document Title Here
Document Title Here
Document Title Here
ACR38x Reference Manual (CCID)
Version 6.02
Page 7 of 20
[e-mail]
www.acs.com.hk
5.0. Power Supply
The ACR38x requires a volt age of 5 V DC, 100 mA, regulated, power supply. The ACR38x Smart
Card Reader gets power supply from a P C (through the cable supplied along with each type of
reader).
5.1. Status LED
The Green LED on the front of the reader indicates the activation status of the smart card interface:
•Flashing slowly (turns on 200ms for every 2 seconds)
Indicates that the ACR38x 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 that the power supply to the smart card is switched on, i.e., the smart card is
activated.
•Flashing quickly
Indicates there is communication between the ACR38x and a smart card.

Document Title Here
Document Title Here
Document Title Here
ACR38x Reference Manual (CCID)
Version 6.02
Page 8 of 20
[e-mail]
www.acs.com.hk
6.0. USB Interface
ACR38x can be connected to a computer through a USB that follows the USB standard.
6.1. CommunicationParameters
The ACR38x is connected to a com puter through USB as specifi ed in the USB Specification 2. 0. The
ACR38x is working in full speed mode, i.e. 12 Mbps.
Pin Signal Function
1
VBUS
+5V power supply for the reader
2
D-
Differential signal transmits data between ACR38x and PC.
3
D+
Differential signal transmits data between ACR38x and PC.
4
GND
Reference voltage level for power supply
Table 1. USB Interface Wiring
Note : In order for the ACR38x (CCID) to function properly through USB interface, the ACS CCID driver
or the Microsoft CCID Driver should be installed.
6.2. Endpoints
The ACR38x uses the following endpoints to communicate with the host computer:
Control Endpoint For setup and control purposes
Bulk OUT For command to be sent from host to ACR38x (data packet size is 64 bytes)
Bulk IN For response to be sent from ACR38x to host (data packet size is 64 bytes)
Interrupt IN For card status message to be s ent from A CR38x to host (dat a packet size is
8 bytes)

Document Title Here
Document Title Here
Document Title Here
ACR38x Reference Manual (CCID)
Version 6.02
Page 9 of 20
[e-mail]
www.acs.com.hk
7.0. Communication Protocol
The ACR38x (CCID) shall int erface with the host thru 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 and PIN.
The configurations and usage of USB endpoints on ACR38x (CCID) shall follow CCID Section 3. An
overview is summarized below:
1. Cont rol Commands are sent on control pipe (default pipe). These include class-specific
requests and USB standard requests. Commands that are s ent on the default pipe report
information back to the host on the default pipe.
2. CCID Events are sent on the interrupt pipe.
3. CCI D Comm ands are sent on BULK-OUT endpoint. Each command sent to ACR38x (CCID)
has an associated ending response. Some commands can also have intermediate responses.
4. CCI D Responses are sent on BULK -IN endpoint. All commands sent to A CR38x (CCID) have
to be sent synchronously. (i.e. bMaxCCIDBusySlots is equal to 1 for ACR38x (CCID))
The supported CCID features by ACR38x (CCID) are indicated in its Class Descriptor:
Offset Field Size Value Description
0 bLength 1 36h Size of this descriptor,in bytes.
1 bDescriptorType 1 21h CCID Functional Descriptor type.
2 bcdCCID 2 0100h CCID Specification Release
Number in Binary-Coded decimal.
4 bMaxSlotIndex 1 00h One slot is available on ACR38x
(CCID)
5 bVoltageSupport 1 07h
ACR38x (CCID) can supply1.8V,
3.0V and 5.0V to its slot.
6 dwProtocols 4 00000003h ACR38x (CCID) supports T=0 and
T=1 Protocol
10 dwDefaultClock 4 00000FA0h Default ICC clock frequency is
4MH z
14 dwMaximumClock 4 00000FA0h
Maximum supported ICC clock
frequency is 4MHz
18 bNumClockSupported 1 00h Does notsupportmanual setting of
clock frequency
19 dwDataRate 4 00002A00h DefaultICC I/O data rate is 10752
bps
23 dwMaxDataRate 4 0001F808h
Maximum supported ICC I/O data
rate is 344 kbps
27 bNumDataRatesSupporte
d 1 00h Does not supportmanual setting of
data rates
28 dw MaxIFSD 4 00000Feh
Maximum IFSD supported by
ACR38x (CCID) for protocol T=1 is
254
32 dwSynchProtocols 4 00000000h
ACR38x (CCID) does notsupport
synchronous card
36 dwMechanical 4 00000000h ACR38x (CCID) does not support
special mechanical characteristics

Document Title Here
Document Title Here
Document Title Here
ACR38x Reference Manual (CCID)
Version 6.02
Page 10 of 20
[e-mail]
www.acs.com.hk
Offset Field Size Value Description
40 dwFeatures 4 00010030h
ACR38x (CCID) supports the
following features:
•Automatic ICC clock
frequency change according
to parameters
•Automatic baud rate change
according to frequency and
FI,DI parameters
•TPDU level exchange with
ACR38x
44 dwMaxCCIDMessageLeng
th 4 0000010Fh Maximum message length accepted
by ACR38x (CCID) is 271 bytes
48 bClassGetResponse 1 00h
Insignificantfor TPDU level
exchanges
49 bClassEnvelope 1 00h
Insignificantfor TPDU level
exchanges
50 wLCDLayout 2 0000h No LCD
52 bPINSupport 1 00h No PIN Verification
53 bMaxCCIDBusySlots 1 01h Only 1 slotcan be simultaneously
busy

Document Title Here
Document Title Here
Document Title Here
ACR38x Reference Manual (CCID)
Version 6.02
Page 11 of 20
[e-mail]
www.acs.com.hk
8.0.Commands
8.1. CCID Command Pipe Bulk-OUT Messages
The A CR38x (CCID) shall foll ow the CCID Bulk-OUT Messages as specifi ed in CCID section 4. In
addition, this specification defi nes some extended commands for operating additional features. This
section lists the CCID Bulk-OUT Messages to be supported by ACR38x (CCID).
8.1.1. PC_to_RDR_IccPowerOn
Activate the card slot and return ATR from the card.
Offset Field Size Value Description
0 bMessageType 1 62h
1 dwLength 4 00000000h Size of extra bytes of this message
2 bSlot 1 Identifies the slot number for this command
5 bSeq 1 Sequence number for command
6 bPowerSelect 1
Voltage that is applied to the ICC
00h – Automatic Voltage Selection
01h – 5 volts
02h
– 3 volts
7 abRFU 2 Reserved for future use
The response to this message is the RDR_to_PC_DataBlock message and the data returned is the
Answer to Reset (ATR) data.
8.1.2. PC_to_RDR_IccPowerOff
Deactivate the card slot.
Offset Field Size Value Description
0 bMessageType 1 63h
1 dwLength 4 00000000h Size of extra bytes of this message
5 bSlot 1 Identifies the slot number for this command
6 bSeq 1 Sequence number for command
7 abRFU 3 Reserved for future use
The response to this message is the RDR_to_PC_SlotStatus message.

Document Title Here
Document Title Here
Document Title Here
ACR38x Reference Manual (CCID)
Version 6.02
Page 12 of 20
[e-mail]
www.acs.com.hk
8.1.3. PC_to_RDR_GetSlotStatus
Get the current status of the slot.
Offset Field Size Value Description
0 bMe ssageType 1 65h
1 dwLength 4 00000000h Size of extra bytes of this message
5 bSlot 1 Identifies the slot number for this command
6 bSeq 1 Sequence number for command
7 abRFU 3 Reserved for future use
The response to this message is the RDR_to_PC_SlotStatus message.
8.1.4. PC_to_RDR_XfrBlock
Transfer data block to the ICC.
Offset Field Size Value Description
0 bMessageType 1 6Fh
1 dwLength 4 Size of abData field of this message
5 bSlot 1 Identifies the slot number for this command
6 bSeq 1 Sequence number for command
7 bBWI 1
Used to extend the CCIDs BlockWaiting
Timeoutfor this current transfer.The CCID will
timeout the block after “this number multiplied
by the Block Waiting Time” has expired.
8 wLevelParameter 2 0000h RFU (TPDU exchange leve l)
10 abData Byte
array Data blocksent to the CCID. Data is sent “as is” to the ICC (TPDU exchange level)
The response to this message is the RDR_to_PC_DataBlock message.

Document Title Here
Document Title Here
Document Title Here
ACR38x Reference Manual (CCID)
Version 6.02
Page 13 of 20
[e-mail]
www.acs.com.hk
8.1.5. PC_to_RDR_GetParameters
Get slot parameters.
Offset Field Size Value Description
0 bMessageType 1 6Ch
1 DwLength 4 00000000h Size of extra bytes of this message
5 BSlot 1 Identifies the slotnumber for this command
6 BSeq 1 Sequence number for command
7 AbR FU 3 Reserved for future use
The response to this message is the RDR_to_PC_Parameters message.
8.1.6. PC_to_RDR_ResetParameters
Reset slot parameters to default value.
Offset Field Size Value Description
0 bMessageType 1 6Dh
1 DwLength 4 00000000h Size of extra bytes of this message
5 BSlot 1 Identifies the slotnumber for this command
6 BSeq 1 Sequence number for command
7 AbR FU 3 Reserved for future use
The response to this message is the RDR_to_PC_Param eters message.

Document Title Here
Document Title Here
Document Title Here
ACR38x Reference Manual (CCID)
Version 6.02
Page 14 of 20
[e-mail]
www.acs.com.hk
8.1.7. PC_to_RDR_SetParameters
Set slot parameters.
Offset Field Size Value Description
0 bMessageType 1 61h
1 dwLength 4 Size of extra bytes of this message
5 bSlot 1 Identifies the slot number for this command
6 bSeq 1 Sequence number for command
7 bProtocolNum 1
Specifies what protocol data structure follows.
00h = Structure for protocol T=0
01h = Structure for protocol T=1
The following values are reserved for future use.
80h = Structure for 2-wire protocol
81h = Structure for 3-wire protocol
82h
= Structure for I2C protocol
8 abRFU 2 Reserved for future use
10 abProtocolDataStru
cture
Byte
array Protocol Data Structure
Protocol Data Structure for Protocol T=0 (dwLength=00000005h)
Offset Field Size Value Description
10 bmFindexDindex 1
B7-4 – FI – Index into the table 7 in ISO/IEC
7816-3:1997 selecting a clock rate conversion
factor
B3-0 – DI - Index into the table 8 in
ISO/IEC 7816-3:1997 selecting a baud rate
conversion factor
11 bm TCCKST0 1
B0 – 0b, B7-2 – 000000b
B1 – Convention used (b1=0 for direct, b1=1 for
inverse) Note: The CCID ignores this bit.
12 bGuardTimeT0 1
Extra Guardtime between two characters. Add
0 to 254 etu to the normal guardtime of 12 etu.
FFh
is the same as
00h
.
13 bWaitingIntegerT0 1 WI for T=0 used to define WWT
14 bClockStop 1
ICC Clock Stop Support
00h = Stopping the Clock is not allowed
01h = Stop with Clock signal Low
02h = Stop with Clock signal High
03h
= Stop with Clock either High or Low

Document Title Here
Document Title Here
Document Title Here
ACR38x Reference Manual (CCID)
Version 6.02
Page 15 of 20
[e-mail]
www.acs.com.hk
Protocol Data Structure for Protocol T=1 (dwLength=00000007h)
Offset Field Size Value Description
10 bmFindexDindex 1
B7-4 – FI – Index into the table 7 in ISO/IEC
7816-3:1997 selecting a clock rate conversion
factor
B3-0 – DI - Index into the table 8 in
ISO/IEC 7816-3:1997 selecting a baud rate
conversion factor
11 BmTCCKST1 1
B7-2 – 000100b
B0 – Checksum type (b0=0 for LRC, b0=1 for
CRC)
B1 – Convention used (b1
=0 for direct, b1=1 for
inverse) Note: The CCID ignores this bit.
12 BGuardTimeT1 1
Extra Guardtime (0 to 254 etu between two
characters).If value is FFh, then guardtime is
reduced by 1 etu.
13 BwaitingIntegerT1 1 B7-4 = BWI values 0-9 valid
B3-0 = CWI values
0
-
Fh
valid
14 bClockStop 1
ICC Clock Stop Support
00h = Stopping the Clock is not allowed
01h = Stop with Clock signal Low
02h = Stop with Clock signal High
03h
= Stop with Clock either High or Low
15 bIFSC 1 Size of negotiated IFSC
16 bNadValue 1 00h Only supportNAD = 00h
The response to this message is the RDR_to_PC_Param eters message.

Document Title Here
Document Title Here
Document Title Here
ACR38x Reference Manual (CCID)
Version 6.02
Page 16 of 20
[e-mail]
www.acs.com.hk
8.1.8. CCID Bulk-IN Messages
The Bulk-IN messages are used in response to the Bulk -OUT messages. ACR38x (CCID) shall foll ow
the CCID Bulk-IN Messages as specified in section 4. This section lists the CCID Bulk-IN Messages
to be supported by ACR38x (CCID).
8.1.9. RDR_to_PC_DataBlock
This message is sent by ACR38x (CCID) in response to P C_to_RDR_IccPowerOn,
PC_to_RDR_XfrBlock and PC_to_RDR_Secure messages.
Offset Field Size Value Description
0 bMessageType 1 80h Indicates that a data block is being sent from
the CCID
1 dwLength 4 Size of extra bytes of this message
5 bSlot 1 Same value as in Bulk-OUT message
6 bSeq 1 Same value as in Bulk-OUT message
7 bStatus 1 Slot status register as defined in CCID section
4.2.1
8 bError 1 Slot error register as defined in CCID section
4.2.1 and this specification section 5.2.8
9 bChainParameter 1 00h RFU (TPDU exchange level)
10 abData Byte
array This field contains the data returned
by the CCID
8.1.10. RDR_to_PC_SlotStatus
This message is sent by ACR38x (CCID) in response to PC_to_RDR_IccPowerOff,
PC_to_RDR_GetSlotStatus, PC_to_RDR_Abort messages and Class specific ABORT request.
Offset Field Size Value Description
0 bMessageType 1 81h
1 dwLength 4 00000000h Size of extra bytes of this message
5 bSlot 1 Same value as in Bulk-OUT message
6 bSeq 1 Same value as in Bulk-OUT message
7 bStatus 1 Slot status register as defined in CCID section
4.2.1
8 bError 1 Slot error register as defined in CCID section
4.2.1 and this specification section 5.2.8
9 bClockStatus 1
value =
00h Clock running
01h Clockstopped in state L
02h Clockstopped in state H
03h Clockstopped in an unknown state
All other values are RFU.

Document Title Here
Document Title Here
Document Title Here
ACR38x Reference Manual (CCID)
Version 6.02
Page 17 of 20
[e-mail]
www.acs.com.hk
8.1.11. RDR_to_PC_Parameters
This message is sent by A CR38x (CCID) in response to P C_to_RDR_GetParameters,
PC_to_RDR_ResetParameters and PC_to_RDR_SetParam eters messages.
Offset Field Size Value Description
0 bMessageType 1 82h
1 dwLength 4 Size of extra bytes of this message
5 bSlot 1 Same value as in Bulk-OUT message
6 bSeq 1 Same value as in Bulk-OUT message
7 bStatus 1
Slot status register as defined in CCID
section 4.2.1
8 bError 1
Slot error register as defined in CCID
section 4.2.1 and this specification section
5.2.8
9 bProtocolNum 1
Specifies what protocol data structure
follows.
00h = Structure for protocol T=0
01h = Structure for protocol T=1
The following values are reserved for future
use.
80h = Structure for 2-wire protocol
81h = Structure for 3-wire protocol
82h
= Structure for I2C protocol
10 abProtocolDataStructure Byte
array
Protocol Data Structure as summarized in
section 5.2.3.

Document Title Here
Document Title Here
Document Title Here
ACR38x Reference Manual (CCID)
Version 6.02
Page 18 of 20
[e-mail]
www.acs.com.hk
8.2. Commands Accessedvia PC_to_RDR_XfrBlock
8.2.1. GET_READER_INFORMATION
This command returns relevant information about the particular ACR38x model and the current
operating status such as the firmware revision number; the maximum data length of a command and
response; the supported card types; and whether a card is inserted and powered up or not.
Note : This command can only be used after the logical smart card reader communication has been
established using the SCardConnect( ) API. For details of SCardConnect( ) API, please refer to
PC/SC specifications.
Command format (abData field in the PC_to_RDR_XfrBlock)
Pseudo-APDU
CLA INS P1 P2 Lc
FF
H
09
H
00
H
00
H
10
H
Response data format (abData field in the RDR_to_PC_DataBlock)
FIRMWARE MAX_ C MAX_R C _TYPE C_SEL C _STAT
FIRMW ARE 10 bytes data for firmware version
MAX_C The maximum number ofcommand data bytes.
MAX_R The maximum number of data bytes that can be requested to be transmitted in a
response.
C_TYPE The card types supported bythe ACR38x (CCID). This data field is a bitmap with each
bit representing a particular card type. A bit set to '1' means the corresponding card
type is supported by the readerand can be selected with the SELECT_CARD_TYPE
command.The bit assignment is as follows:
Byte
1 2
card type
F E D C B A 9 8 7 6 5 4 3 2 1 0
See Appendix A for the correspondence between these bits and the respective card
types.
C_SEL The currently selected card type. A value of 00Hmeans that no card type has been
selected.
C_STAT Indicates whether a card is inserted in the reader and whether the card is powered up:
00 H: no card inserted
01 H: card inserted, notpowered up
03 H: card powered up

Document Title Here
Document Title Here
Document Title Here
ACR38x Reference Manual (CCID)
Version 6.02
Page 19 of 20
[e-mail]
www.acs.com.hk
Appendix A. Supported Card Types
This table lists the card types returned by GET_READE R_I NFO RMATIO N corresponding with the
respective card type code:
Card type code Card Type
00
HAuto-select T=0 or T=1 communication protocol
01
HI2C memory card (1k, 2k, 4k, 8k and 16k bits)
02
HI2C memory card (32k, 64k, 128k, 256k, 512k and 1024k bits)
03
HAtmel AT88SC153 secure memory card
04
HAtmel AT88SC1608 secure memory card
05
HInfineon SLE4418 and SLE4428
06
HInfineon SLE4432 and SLE4442
07
HInfineon SLE4406, SLE4436 and SLE5536
08
HInfineon SLE4404
09
HAtmel AT88SC101, AT88SC102 and AT88SC1003
0C
HMCU-based cards with T=0 communication protocol
0D
HMCU-based cards with T=1 communication protocol

Document Title Here
Document Title Here
Document Title Here
ACR38x Reference Manual (CCID)
Version 6.02
Page 20 of 20
[e-mail]
www.acs.com.hk
Appendix B. Response Error Codes
This table lists the error codes that may be returned by the ACR38x:
Error Code Status
FFHSLOTERROR_CMD_ABORTED
FEHSLOTERROR_ICC_MUTE
FDHSLOTERROR_XFR_PARITY_ERROR
FCHSLOTERROR_XFR_OVERRUN
FBHSLOTERROR_HW_ERROR
F8HSLOTERROR_BAD_ATR_TS
F7HSLOTERROR_BAD_ATR_TCK
F6HSLOTERROR_ICC_PROTOCOL_NOT_SUPPORTED
F5HSLOTERROR_ICC_CLASS_NOT_SUPPORTED
F4HSLOTERROR_PROCEDURE_BYTE_CONFLICE
F3HSLOTERROR_DEACTIVATED_PROTOCOL
F2HSLOTERROR_BUSY_WITH_AUTO_SEQUENCE
E0HSLOTERROR_CMD_SLOT_BUSY