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ACR33U-A1 SmartDuo Reference Manual
Version 1.00
Page 14 of 56
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
00-
05h
Identifies the slot number for this
command
6
bSeq
1
00-
FFh
Sequence number for command
7
bProtocolNum
1
00h,
01h
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
abProtocolDataSt
ructure
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
bmTCCKST0
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
00-
FFh
Extra Guardtime between two
characters. Add 0 to 254 etu to the
normal guardtime of 12etu.
FFh
is the
same as
00h
.
