Datasheet

UART1_S IN
UAR T1_SOUT
LS1046A
UAR T3_SIN
UART3_SOUT
DVDD
(3.3V)
UART2_S IN
UAR T2_SOUT
UAR T2_CTS _B
UAR T2_RTS _B
GND
UART_R TS
3V3
UART_S IN
UART_S OUT
UART_CTS
UAR T2_SIN
UART2_SOUT
UART2_CTS _B /UART4_S IN
UAR T2_RTS _B /UART4_SOUT
UART expansion header
Pinout
HDR 1x2
MikroBUS socket
Console port
CP2102N-A01-GQFN20
[Silicon Labs]
micro USB
USB-to-UART
bridge
UART1_S OUT
UAR T1_SIN
Pinout
3V3
UART_S OUT
UART_S IN
GND
Jumper
*when using USB for console
otherwise open
Figure 17. UART diagram
It is recommended to use UART1 as a debug port.
NOTE
The FRWY-LS1046A supports following UART features:
• UART1 is routed to CP2102N USB-UART bridge and supports micro-USB port to access the serial port as console. This
connection requires placing a jumper on header J72.
• UART1 can be used without flow control on expansion header J73 (3.3 V). This connection requires removing the jumper
from header J72.
• UART3 signals can be used to communicate with click board plugged-in into mikroBUS socket
• UART2 can be used with/without flow control on expansion header J60 (3.3 V). A remote UART connection can be made
from the expansion header using an FTDI standard 3.3 V cable (TTL-232R-3V3) or by connecting to an RS-232/RS-485/
RS-422 expansion card.
• UART4 can be used on expansion header J60 (3.3 V)
The table below shows pinout details of UART expansion header J73.
Table 15. UART expansion header J73 pinout
Pin number UART signals Direction with respect to LS1046A I/O voltage
1 3V3 3.3 V
Table continues on the next page...
UART interface
Layerscape FRWY-LS1046A Board Reference Manual, Rev. 0, 26 April 2019
NXP Semiconductors
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