Seco SBC-C90 User Manual page 39

3.3.16 GPIO Header
GPIO Header CN28
Pin Signal Pin Signal
1 +3.3V_EXT 2 GND
3 EXT_GPIO0 4 EXT_GPIO7
5 EXT_GPIO1 6 EXT_GPIO6
7 EXT_GPIO2 8 EXT_GPIO5
9 EXT_GPIO3 10 EXT_GPIO4
3.3.17 I2C Header
I2C Header CN35
Pin Signal Pin Signal
1 +3.3V_EXT 2 +3.3V_EXT
3 I2C1_SCL 4 I2C2_SCL
5 I2C1_SDA 6 I2C2_SDA
7 GND 8 GND
I2C1_SDA: general purpose I2C#1 Bus data line. Output signal, electrical level +3.3V_ALW with a 2k2
I2C2_SCL: general purpose I2C#2 Bus clock line. Output signal, electrical level +3.3V_ALW with a 2k2
I2C2_SDA: general purpose I2C#2 Bus data line. Output signal, electrical level +3.3V_ALW with a 2k2
SBC-C90
SBC-C90 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: A.R. - Reviewed by C.M. Copyright © 2021 SECO S.p.A.
Managed by the Embedded Controller, on SBC-C90 board there are 8 (eight) GPIOs at electrical level 3.3V (5V
tolerant).
Access to these General Purpose I/Os comes through a dual-row 10-pin SMT male pin-header,
p. 1.27mm, type NELTRON 2199SB-10G-SM-3021-CR or equivalent, with pinout shown in the
table on the left.
EXT_GPIO_[0..7]: I/O Expander Input/Output [0..7], voltage reference level: +3.3V_ALW
+3.3V_EXT: Dedicated +3.3V power rail for external use, obtained by +3.3V_ALW through a power switch
(limited to 0.6A)
Managed by the Embedded Controller, on SBC-C90 board there also two General Purpose I2C interfaces.
Access to these I2C interface through a dual-row 8-pin SMT male pin-header, p. 1.27mm,
type TOWNES P1035-2*04MGF-084-D or equivalent, with pinout shown in the table on the
left.
+3.3V_EXT: Dedicated +3.3V power rail for external use, obtained by +3.3V_ALW through a power switch
(limited to 0.6A)
I2C1_SCL: general purpose I2C#1 Bus clock line. Output signal, electrical level +3.3V_ALW with a 2k2
up resistor.
-up resistor.
-up resistor.
-up resistor.
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