ACS ACR101 SIMicro (CCID) - Manual (Page 13)

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
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
abProtocolData
Structure
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
14 bClockStop 1
ICC Clock Stop Support
00h = Stopping the Clock is not
allowed
01h
= Stop with Clock signal Low
02h = Stop with Clock signal High
03h = Stop with Clock either High or
Low
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Document Title Here ACR101 PC/SC Memory Card Access
Version 1.0
Page 13 of 19
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