ACS ACR3801 Smart Card Reader - Manual (Page 18)

ACR3801 – Reference Manual [email protected]
Version 2.01
www.acs.com.hk
Page 18 of 62
8.1.7. PC_to_RDR_SetParameters
Sets 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 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 12etu. 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