Seco SBC-D23 User Manual page 45

3.3.18 STM32 Programming Connector
STM32 Programming
connector CN56
Pin Signal
1 +3P3V_RUN
2 DBG_TXD
3 DBG_RXD
4 BOOT0
5 SWDIO/JTMS
6 SWCLK/JTCK
7 EC_RST#
8 GND
I2C_OUT2_SCL signal on CN33 connector).
DBG_RXD: microcontroller s Debug UART receive signal (only in case that corresponding STM32 signal is not used as I2C_OUT2_SDA signal on CN33 connector).
Please be aware that using some programmers it could arise electrical incompatibilities on EC_RST#signal. In these cases, please set Software Reset
programming tool.
3.3.19 ON/OFF and Reset Connector
SD23 board can offer a dual push-button switch (P/N HY-1102HLT-A95B50) for the On/Off and System Reset functionalities.
Upper push button is used for On/Off, while lower push button is used for Reset.
Please be aware that the dual push button switch is available only on board in commercial temperature range, since it cannot sustain
the full industrial temperature range.
SBC-D23
SBC-D23 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: S.B. - Reviewed by P.Z. - Copyright © 2021 SECO S.p.A.
Since many features of the board depends on its FW programming, it is given the possibility to the user to
program it by themselves using connector CN56, which is an 8-pin 1.25mm pitch connector type Molex
p/n 53398-0871 or equivalent.
Mating connector: MOLEX 51021-0800 receptacle with MOLEX 50079-8000 female crimp terminals.
SWDIO/JTMS: Serial Wire Debug/JTAG TMS input
SWDIO/JTCLK: Serial Wire Debug/JTAG TCK input
BOOT_0: Boot selection pin. Electrical Level +3P0V_VDD_PMU with 10
EC_RST#
pull-up resistor
DBG_TXD: microcontroller s Debug UART transmit signal (only in case that corresponding STM32 signal is not used as
pull-down resistor, directly connected to
Electrical Level +3P0V_VDD_PMU with 10
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