User's Manual l TQMa8MxML UM 0103 l © 2022, TQ-Systems GmbH
Page 25
3.2.3
Trust Secure Element SE050
As an option, a Trust Secure Element NXP SE050 can be assembled on the TQMa8MxML. The SE050 is connected to the I2C1 bus.
The ISO14443 signals are routed to the I2C4 interface, which is no longer available in this case.
i.MX 8M Mini / Nano
LGA
SE050
ISO_7816_IO1
ISO_7816_IO2
I2C4_SCL
ISO_7816_RST
I2C_SDA
IO1 / SDA
IO2 / SCL
RST_N
CLK
LB
LA
I2C4_SDA
ISO_7816_CLK
I2C1_SCL
I2C1_SDA
I2C_SCL
I2C4_SCL
I2C4_SDA
NP
NP
Figure 6:
Block diagram Trust Secure Element
The antenna for ISO 14443, or the sensor for ISO 7816, must be connected on the carrier board.
The following TQMa8MxML signals are used to provide the smartcard interfaces.
Table 17:
Trust Secure Element signals
Signal
ISO signal name
TQMa8MxML
Power group
ISO_7816_IO1
ISO 7816 IO1 / SDA
F14
V_3V3
ISO_7816_IO2
ISO 7816 IO2 / SCL
F13
ISO_7816_RST
ISO 7816 RST#
F12
ISO_7816_CLK
ISO 7816 CLK
F15
I2C4_SCL
ISO 14443 LB
C14
ISO 14443 (Antenna)
I2C4_SDA
ISO 14443 LA
D13
The Trust Secure Element has I
2
C address
Unused signals should be terminated as follows:
Figure 7:
Termination of unused SE050 signals
Note: Signal availability I2C4
For TQMa8MxML variants with populated Trust Secure Element, the I2C4 signals listed in the above
table are disconnected from the i.MX 8M Mini and thus no longer available.
