User Manual
MIFARE SAM AV3 Evaluation Board
User manual COMPANY PUBLIC
Information provided in this document is subject to legal disclaimers
© GMMC GmbH. 2020. All rights reserved.
Rev. 1.0 19-JAN-2022
11
7 MIFARE SAM AV3
–
required default configuration changes
To ensure backwards compatibility to the SAM AV2 the default configuration is set for the NXP frontend
reader PN523 IC for X-mode communication. Along with this, the I²C processing clock speed needs to be
adjusted as well as this is set to I²C fast mode (12 MHz processing clock speed) and needs to be reduced
for operating the CLRC663.
This needs to be changed using the SAM SetConfig command once. The command looks like the following:
Command:
80 3C 01 00 01 03
Set Configuration for reader frontend selection
Byte
Value
Meaning
CLA
0x80
Class
INS
0x3C
Instruction: SAM SetConfiguration
P1
0x01
Reader IC configuration
P2
0x00
RFU
Le
0x01
Length of subsequent data field
INF
0x03
X-mode frontend CLRC663
Command:
80 3C 02 00 01 06
SAM_SetConfiguration for I²C processing clock speed
Byte
Value
Meaning
CLA
0x80
Class
INS
0x3C
Instruction: SAM SetConfiguration
P1
0x02
I²C processing clock speed
P2
0x00
RFU
Le
0x01
Length of subsequent data field
INF
0x06
I²C processing clock speed: 6 MHz
This reduces the I²C communication speed on the X-mode interface to ~400 kbit/s.
All details about the MIFARE SAM AV3 configuration and features can be found in the respective NXP
documents.
