ACS ACR38K Smart Keyboard - Manual (Page 56)

ACR38x (CCID) – Reference Manual [email protected]
Version 6.04 www.acs.com.hk
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9.4. Other Commands Access via PC_to_RDR_XfrBlock
9.4.1. GET_READER_INFORMATION
This command returns relevant information about the particular ACR38x (CCID) 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
FFh 09h 00h 00h 10h
Response Data Format (abData field in the RDR_to_PC_DataBlock)
FIRMWARE MAX_C MAX_R C_TYPE C_SEL C_STAT
Where:
FIRMWARE 10 bytes data for firmware version
MAX_C The maximum number of command 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 by the 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 reader and 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
Refer to the next section for the correspondence between these bits and the respective card types.
C_SEL The currently selected card type. A value of 00h means that no card type has
been selected.
C_STAT Indicates whether a card is physically inserted in the reader and whether the card
is powered up:
00h: No card inserted
01h: Card inserted, not powered up
03h: Card powered up