User's Manual l TQMa6x & TQMa6xP UM 0403 l © 2019, TQ-Systems GmbH
Page 28
3.2.5.22
UART
The i.MX6 provides five UART interfaces. UART2 to UART5 also provide handshake signals.
All four interfaces (UART2 to UART5) are available as primary function at the connectors.
i.MX6
Connectors
UART[5:2]_TX
UART[5:2]_RX
UART[5:2]_TX
UART[5:2]_RX
UART[5:2]_RTS#
UART[5:2]_RTS#
UART[5:2]_CTS#
UART[5:2]_CTS#
Illustration 12: Block diagram UART interfaces
The following table shows the signals used by the UART interfaces.
Table 42:
Signals UARTs
Signal name
Direction
i.MX6 ball
TQMa6x
Remark
UART5_TXD
O
M4
X1–91
–
UART5_RXD
I
M5
X1–89
–
UART5_CTS#
O
L6
X1–95
–
UART5_RTS#
I
M6
X1–93
–
UART4_TXD
O
M2
X1–83
–
UART4_RXD
I
L1
X1–81
–
UART4_CTS#
O
L3
X1–87
–
UART4_RTS#
I
L4
X1–85
–
UART3_TXD
O
B17
X2–61
–
UART3_RXD
I
E16
X2–59
–
UART3_CTS#
O
J20
X2–80
–
UART3_RTS#
I
H21
X2–79
–
UART2_TXD
O
D19
X2–29
–
UART2_RXD
I
E18
X2–27
–
UART2_CTS#
O
B20
X2–30
Multiplexed as GPIO in the
UART2_RTS#
I
C19
X2–28
Multiplexed as GPIO in the
