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.
40
3.3.16
onnectors
The SD23 board is completed by a series of connectors with various interfaces managed by the microcontroller STM32F302VCT6. All signals available on these
connectors can be used as generic I/Os, but upon specific FW programming, they can be easily adapted to implement other interfaces, all of them described in the
following tables.
All signals, unless differently specified, are at 3P3V_RUN Voltage.
It is possible to have two 2-Wire UARTs on 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.
EC_UART1_TX: microcontroller UART port #1, Transmit signal. Connected to microcontroller
in
#4.
EC_UART5_RX: microcontroller UART p
Two others Synchronous UARTs can be made available on dedicated connector J2, which is an
internal 14-pin dual row p.2.54 mm header (type MOLEX p/n 70246-1404 or equivalent).
Mating connector: MOLEX 22552141 Crimp Housing with MOLEX 70058 female crimp terminals series
EC_UART2_TX: microcontroller USART port #2, Transmit signal. Connected to
#5.
#6.
EC_UART2_RTS/DE: microcontroller USART port #2, Request To Send / Data Enable signal. Connected to
s port D, pin #4.
D, pin #3.
Dual 2-Wire UART connector
CN32
Pin Signal
1
+3P3V_OUT_EC
2
EC_UART1_TX
3
EC_UART1_RX
4
GND
5
+3P3V_OUT_EC
6
EC_UART5_TX
7
EC_UART5_RX
8
GND
Dual 4-Wire USART connector J2
Pin
Signal
Pin
Signal
1
+3P3V_OUT_EC
2
+3P3V_OUT_EC
3
EC_UART2_TX
4
EC_UART3_TX
5
EC_UART2_RX
6
EC_UART3_RX
7
EC_UART2_RTS/DE
8
EC_UART3_RTS/DE
9
EC_UART2_CTS
10
EC_UART3_CTS
11
EC_UART2_CLK
12
EC_UART3_CLK
13
GND
14
GND
