SBC-C23
SBC-C23 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.1 - Author: S.B. - Reviewed by L.B. -Copyright © 2020 SECO S.p.A.
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3.3.13
Expansion connectors
The SBC-C23 board offers the possibility of expanding its functionalities by using some additional
interfaces, available on two dedicated 10-pin PCB terminal blocks, CN59 and CN60, type
EUROCLAMP p/n PV08-3,81-H-P or equivalent.
The pinout of these connectors are shown in the tables on the left .
PWM_6_5V: PWM Output signal, electrical level VCC_SW with 2k2
Ω
pull-up resistor. It is managed by i.MX6SX pin
RGMII2_TD2.
PWM_5_5V: PWM Output signal, electrical level VCC_SW with 2k2
Ω
pull-up resistor. It is managed by i.MX6SX pin
RGMII2_TD3.
I2C2_SDA_5V: I2C Bus data line. Bidirectional signal, electrical level VCC_SW with a 2k2
Ω
pull-up resistor. It is managed by
i.MX6 processor
’
s I2C controller #2 (pin GPIO_3)
I2C2_SCL_5V: I2C Bus clock line. Output signal, electrical level VCC_SW with a 2k2
Ω
pull-up resistor. It is managed by i.MX6
processor
’
s I2C controller #2 (pin GPIO_2)
ADC_[0..3]: i
0..+3.3V]).
RS_232_TX: i.MX6SX UART #2 transmit data signal, RS-232 electrical level. It is managed by i.MX6SX pin GPIO_IO06
RS_232_RX: i.MX6SX UART #2 Receive data signal, RS-232 electrical level. It is managed by i.MX6SX pin GPIO_IO07
RS_232_RTS: i.MX6SX UART #2 Request to Send signal, RS-232 electrical level. It is managed by i.MX6SX pin SD1_DATA3
RS_232_CTS: i.MX6SX UART #2 Clear to Send signal, RS-232 electrical level. It is managed by i.MX6SX pin SD1_DATA2
CAN ports: they are managed using as many NXP TJA1051T High Speed CAN Transceivers. The i.MX6SX CAN port #1 is
available on pins SD3_DATA7 and SD3_DATA5, while CAN port #2 is available on pins SD3_DATA6 and SD3_DATA4
CAN1_H: High-Level CAN bus line, port #1.
CAN1_L: Low-Level CAN bus line, port #1.
CAN2_H: High-Level CAN bus line, port #2.
CAN2_L: Low-Level CAN bus line, port #2.
/RS485_D-: : RS-485 port, differential pair. It is managed using i.MX6SX UART Port #3, available on pins
QSPIB_SCLK, QSPIB_SS0_B and QSPIB_DATA0 (CTS signal, necessary to manage the direction of RS-485 port)
VCC_OUT_5V: 5V switched voltage for I/Os, max 500mA, derived from VCC_SW voltage.
Expansion Connector #1
CN59
Pin
Signal
1
VCC_OUT_5V
2
GND_I/O
3
PWM_6_5V
4
PWM_5_5V
5
I2C2_SDA_5V
6
I2C2_SCL_5V
7
ADC_0
8
ADC_1
9
ADC_2
10
ADC_3
Expansion Connector #2
CN60
Pin
Signal
1
RS_232_TX
2
RS_232_RX
3
RS_232_RTS
4
RS_232_CTS
5
CAN1_H
6
CAN1_L
7
CAN2_H
8
CAN2_L
9
10
RS485_D-
