User Manual
MIFARE SAM AV3 Evaluation Board
User manual COMPANY PUBLIC
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© GMMC GmbH. 2020. All rights reserved.
Rev. 1.0 19-JAN-2022
10
MCU Interface Selection
The connection between the MIFARE SAM AV3 and the MCU is done by either of the 2 supported I²C
interface locations on the Arduino
®
R3 header. The selection is done by JP3 and JP4, which are placed on
the corresponding pins.
MIFARE SAM AV3 host interface and VDD selection
The MIFARE SAM AV3 evaluation board offers two options to interface with the MIFARE SAM AV3:
I²C and ISO7816. I²C was explained earlier in this document. For ISO7816 communication to supply and
configure VDD of the MIFARE SAM AV3.
VDD is selected on JP9, the options are permanent 3V3 or IO6 on the Arduino header. Permanent 3V3
means that the MIFARE SAM AV3 will stay in the state it is, until the whole board is power cycled. The ATR
of the SAM only needs to be retrieved once. Using IO6 as VDD gives the user the possibility to only power
cycle the MIFARE SAM AV3, therefore having the option of a reset, without resetting the MCU.
In case a user wants to access the MIFARE SAM AV3 via the ISO7816 Smartcard interface, a Jumper needs
to be placed on the ISO7816 header as shown and it is important
that
in this case, the VDD selection jumper
needs to be removed (set to inactive position as shown), as the MIFARE SAM AV3 VDD needs to be
controlled by the ISO7816 interface.
Figure 16: SAM AV3 VDD and ISO7816 selection
