ACR3801 – Reference Manual
Version 2.01
www.acs.com.hk
Page 60 of 62
8.4. Other Commands Access via PC_to_RDR_XfrBlock
8.4.1.
GET_READER_INFORMATION
This command returns relevant information about ACR3801 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 ACR3801. 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