ACR122T – Application Programming Interface
Version 2.02
www.acs.com.hk
Page 27 of 45
7.0. Basic Program Flow for Contactless Applications
Step 0. Start the application. The reader will do the PICC Polling and scan for tags continuously.
Once the tag is found and detected, the corresponding ATR will be sent to the PC. You must make
sure that the PCSC Escape Command has been set. See
Step 1. The first thing is to connect the “ACR122T PICC Interface”.
Step 2. Access the PICC by sending APDU commands.
:
:
Step N. Disconnect the “ACR122T PICC Interface”. Shut down the application.
Note:
1. The antenna can be switched off in order to save the power.
•
Turn off the antenna power: FF 00 00 00 04 D4 32 01 00h
•
Turn on the antenna power: FF 00 00 00 04 D4 32 01 01h
2. Standard and Non-Standard APDUs Handling.
•
PICCs that use Standard APDUs: ISO 14443-4 Type A and B, Mifare .. etc
•
PICCs that use Non-Standard APDUs: FeliCa, Topaz .. etc.
Figure 3
: Basic Program Flow for Contactless Applications