ACR122T – Application Programming Interface
Version 2.02
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Appendix C. APDU Command and Response Flow
for ISO 18092-compliant Tags
Assume a TOPAZ tag is used.
<< Typical APDU Command and Response Flow >>
PC
Sequences
Reader
USB Interface
(12 Mbps)
Tag
RF Interface
(13.56 MHz)
1. The command
is sent.
Contactless Related Command
[Native Command]
e.g. [01 08h] (read memory address 08h)
or
Pseudo APDU Command
+
[Native Command]
e.g.
FF 00 00 00 05 D4 40 01h
[01 08h]
Tag-specific Command
Frame
[Native Command]
embedded in ISO
18092 Frame
2. The response
is received.
Contactless Related Response
[Native Response]
e.g. 00h (90 00h)
or
Pseudo APDU Response
+ [Native Response]
e.g.
D5 41 00h
[00h] (90 00h)
Tag-specific Response
Frame
e.g.
[Native Response]
embedded in
ISO 18092 Frame