ACR100I – Reference Manual
Version 1.00
www.acs.com.hk
Page 13 of 20
Offset
Field
Size
Value
Description
6
BSeq
1
Sequence number for command
7
AbRFU
3
Reserved for future use
The response to this message is the
RDR_to_PC_Parameters
message.
7.1.1.7.
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
it 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
abProtocolDataStructure
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
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