TQ TQMa335xL, User Manual

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User's Manual l TQMa335xL UM 0101 l © 2019, TQ-Systems GmbH Page 20
3.2.4.15 UART
The AM335x provides five UART interfaces. UART0, UART3 and UART4 are routed to the TQMa335xL pads as primary functions.
In the
BSP provided by TQ-Systems GmbH UART4 is the serial console on the MBa335x.
3.2.4.16 UART0
The UART0 interface also provides handshake signals.
AM335x LGA pads
UART0_TX
UART0_RX UART0_TX
UART0_RX
UART0_RTS# UART0_RTS#
UART0_CTS# UART0_CTS#
Illustration 6: Block diagram UART0 interface
The following table shows the signals used by the UART0 interface.
Table 27: UART0 signals
TQMa335xL pad Signal Pad Dir. AM335x ball Remark
M1 UART0_RXD UART0_RXD I/O E15 –
L1 UART0_TXD UART0_TXD I/O E16 –
K1 DCAN1_RX UART0_RTS# I/O E17 Muxed as DCAN1_RX in TQ-BSP
J1 DCAN1_TX UART0_CTS# I/O E18 Muxed as DCAN1_TX in TQ-BSP
UART0_CTS# and UART0_RTS# are only available if DCAN1 is not used.
3.2.4.17 UART3
The UART3 interface does not provide handshake signals. The UART3 signals are multiplexed with MMC0_CD# and MMC0_WP#.
AM335x LGA pads
UART3_TX
UART3_RX UART3_TX
UART3_RX
Illustration 7: Block diagram UART3 interface
The following table shows the signals used by the UART3 interface.
Table 28: UART3 signals
TQMa335xL pad Signal Pad Dir. AM335x ball Remark
K2 UART3_RXD SPI0_CS1# I/O C15 MMC0_CD#
J2 UART3_TXD ECAP0_IN_PWM0_OUT I/O C18 MMC0_WP#