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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I2C3_SCL: I2C Bus clock line. Bidirectional signal, electrical level NVCC_1V8 with a 2k2
Ω
pull-
up resistor. It is managed by i.MX6 processor
’
s I2C3 controller.
I2C3_SDA: I2C Bus data line. Bidirectional signal, electrical level NVCC_1V8 with a 2k2
Ω
pull-
up resistor. It is managed by i.MX6 processor
’
s I2C1 controller.
I2C3_ALERT_1#: I2C Bus Alert Line. NVCC_1V8 signal with a 100k
Ω
pull-up resistor directly
managed through i.MX6SX pin RGMII1_TD2.
LED#: Active Low signal, can be used by the module to drive a Red LED available on C23
board, specific for M.2 Key B Slot functionalities.
SPI_CLK: SPI bus Clock Signal, NVCC_3V0 signal, managed by i.MX6Sx ECSPI controller #5
(pin QSPIB_SS1_B)
SPI_MISO: SPI bus Master In Slave Out Data signal, NVCC_3V0 signal, managed by i.MX6Sx ECSPI controller #5 (pin QSPIA_SS1_B)
SPI_MOSI: SPI bus Master Out Slave In Data signal, NVCC_3V0 signal, managed by i.MX6Sx ECSPI controller #5 (pin QSPIA_DQS)
3.3.8
Debug UART Connector
Onboard, connector CN70 carries out signals related to UART #1 interface 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.
UART1_RXD: UART #1 Receive data signal, electrical level NVCC_3V0.
UART1_TXD: UART #1 Transmit data signal, electrical level NVCC_3V0
3.3.9
UART #5 Connector
Onboard, connector CN69 carries out signals related to UART #5 interface at TTL Level.
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.
UART5_RXD: UART #5 Receive data signal, electrical level NVCC_3V0.
UART5_TXD: UART #5 Transmit data signal, electrical level NVCC_3V0
59
---
60
I2C3_SCL
61
---
62
I2C3_ALERT_1#
63
GND
64
---
65
---
66
---
67
---
68
---
69
GND
70
---
71
---
72
+3.3V_ALW
73
---
74
+3.3V_ALW
75
GND
Debug UART Connector CN70
Pin Signal
1
SW2_3V0
2
UART1_RXD
3
UART1_TXD
4
GND
UART #5 Connector CN69
Pin Signal
1
SW2_3V0
2
UART5_RXD
3
UART5_TXD
4
GND
