User's Manual l TQMa8MxML UM 0103 l © 2022, TQ-Systems GmbH
Page 38
3.2.5.13
UART
The i.MX 8M Mini provides four UART interfaces, which are all routed to TQMa8MxML LGA pads.
UART2 can be used to debug the A53 core, UART4 can be used to debug the M4 core.
The voltage supply must be set to 1.8 V or 3.3 V via LGA pad V_UART.
i.MX 8M Mini / Nano
LGA
UART[4:1]_RXD
UART[4:1]_TXD
UART[4:1]_RX
UART[4:1]_TX
Figure 18: Block diagram UART interfaces
The following table shows the signals used by the UART interfaces.
Table 30:
UART signals
Signal
CPU ball
TQMa8MxML
Power group
UART1_RXD
E14
E16
V_UART
UART1_TXD
F13
D16
UART2_RXD
F15
G16
UART2_TXD
E15
F16
UART3_RXD
E18
J16
UART3_TXD
D18
H16
UART4_RXD
F19
L16
UART4_TXD
F18
K16
