ACR38 Reference Manual
version 1.9 February 2006
Command format
Header
Instruction
Data length
Data
LEN
PPS
Request
01
H
0A
H
MSB LSB
LEN
Length of PPS request. Typical value is “4”
PPS Request
PPS Request to send to the card (Please refer to ISO/IEC 7816-3:1997 Section 7 for
details of PPS request)
A typical PPS request to select T=1 protocol and FD=0x94 (62500 baud at 4MHz) is: 0xFF
0x11 0x94 0x7A
Response data format
Header
Status
Data length
Data
LEN
01
H
…
8.1.5 SET_READER_PPS
This command sends PPS Response to the reader, and asks the reader to switch its protocol and/or speed
to communication with the smart card. This command should work in pair with SET_CARD_PPS.
Command format
Header
Instruction
Data length
Data
LEN
PPS
Response
01
H
0B
H
MSB LSB
LEN
Length of PPS response. Typical value is “4”.
PPS Response
PPS Response received from the card (Please refer to ISO/IEC 7816-3:1997 Section 7 for
details of PPS response). After the driver or the application validates the PPS Response, it
should send the PPS Response to the reader. The reader can then switch the protocol
and/or speed.
A typical PPS response should be the same as PPS Request.
Response data format
Header
Status
Data length
LEN
01
H
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