SBC-C43
SBC-C43 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: A.R. - Reviewed by S.R. -Copyright © 2020 SECO S.p.A.
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Debug UART Connector
Onboard, connector CN39 carries out signals related to Debug Serial Port, which is managed by NXP i.MX8 UART3
internal controller, with signals available at TTL level. This interface can be used for the debugging of the processor.
For this purpose, a dedicated 4-pin Connector, Type MOLEX p/n 53398-0471 or equivalent is provided. Mating
connector: MOLEX 51021-0400 receptacle with MOLEX 50079-8000 female crimp terminals.
UART0_RX: UART #0 Receive data signal, electrical level +3.3V_RUN
UART0_TX: UART #0 Transmit data signal, electrical level +3.3V_RUN
JTAG Connector
SBC-C43 board is equipped with a connector reporting the JTAG signals
coming from the i.MX8 processor, which can be useful for software debugging
and tracing in development phase. This connector is a 10-pin single line SMT
connector, type MOLEX 53398-1071 or equivalent, with pinout shown in the
table on the left. Mating connector: MOLEX 51021-1000 receptacle with
MOLEX 50079-8000 female crimp terminals.
Power and Reset buttons
SBC-C43 board is equipped with a Reset button SW1 and Power button SW2, type C&K p/n KMR211G LFS.
For SW1 Reset button, upon the pressure of this pushbutton, will cause the reset of the board.
For SW2 Power button, upon the pressure of this pushbutton, will let the switched voltage rails turn on or off.
Boot Mode Selection jumper JP2
The onboard 2-way jumper JP2 can be used to select boot mode for the SBC-C43 module.
When the jumper is inserted, then the processor will search for the USB OTG connection to be established, in order to download a program image to the chip.
When the jumper is not inserted, the processor will continue to execute the boot code from the internal boot ROM.
Debug
UART
CN39
Pin
Signal
1
+3.3V_RUN
2
UART0_RX
3
UART0_TX
4
GND
JTAG Connector CN18
Pin Signal
Pin Signal
1
JTAG_VTREF
6
JTAG_TDO
2
JTAG_TMS
7
RTCK
3
GND
8
JTAG_TDI
4
JTAG_TCK
9
---
5
GND
10
JTAG_SRST_B