ACS ACR89U-A1, Reference Manual

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ACR89U-A1 – Reference Manual
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Version 1.04
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Page 8 of 57
Offset Field Size Value Description
40 dwFeatures 4 000204B2h
ACR89 supports the following features:
• Automatic parameter configuration
based on ATR data
• Automatic ICC clock frequency
change according to parameters
• Automatic baud rate change
according to frequency and FI, DI
parameters
• Automatic PPS made by the ACR89
according to the current parameters
• Automatic IFSD
• Short APDU level exchange with
ACR89
44 dwMaxCCIDMessageLength 4 00000110h Maximum message length accepted by
ACR89 is 272 bytes
48 bClassGetResponse 1 FFh
Echo class of APDU in Get Response
command
49 bClassEnvelope 1 FFh
Insignificant (Short APDU exchange
level)
50 wLCDLayout 2 0815h 8 lines x 21 characters LCD
52
bPINSupport
1 03h
ACR89 supports PIN Verification and
PIN Modification
53 bMaxCCIDBusySlots 1 01h Only 1 slot can be simultaneously busy
Note: Standard CCID adopts little endian mode.
3.2. CCID Class-Specific Requests
ACR89’s USB communication with PC is based on command message format standard of ACR89
reader. This device shall support one CCID Class-Specific Request. Class-specific requests are sent
via Control Pipe.
3.2.1. Command Summary
Stop any current processing command and return to a state where ACR89 is ready to accept a new
command:
bmRequestType bRequest wValue wIndex wLength Data
00100001B
ABORT
(01h)
bSeq, bSlot Interface 0000h None
3.3. CCID Command Pipe BulK-Out Message
ACR89 reader follows the CCID Bulk-OUT Messages as standard CCID Rev 1.1 session 6.1. In
addition, this specification defines some extended commands for operating additional features. This
section lists the CCID Bulk-OUT Messages to be supported by ACR89. The extended commands will
be introduced in Section 3.5 .