SoM-112ES User Manual
Revision 1.00 © 2018
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9
EXPIO_4
10
EXPIO_5
11
EXPIO_6
12
EXPIO_7
13
GPIO_5/AD-1
14
GPIO_6/AD-2
15
GPIO_7/AD-3
16
GPIO_8/AD-4
17
GND
18
GND
19
GPIO_9/MISO
20
GND
21
GPIO_10/MOSI
22
GND
23
GPIO_11/SCK
24
GND
25
GPIO_12/CS0n
26
GND
27
GPIO_13/CS1n
28
GND
29
SPI_EXT_MISO
30
GND
31
SPI_EXT_MOSI
32
GND
33
SPI_EXT_CLK
34
GND
35
SPI_EXT_CS1n
36
GND
37
SPI_EXT_CS2n
38
GND
39
GND
40
GND
41
I2C_CLK-E
42
GPIO_1/IRQ_1
43
I2C_DAT-E
44
GPIO_14/PWM1
45
SOM_RSTO#
46
GPIO_15/PWM2
47
5V_VCC
48
5V_VCC
49
GND
50
GND
2.12
Mikrobus Expansion
The SoM-112ES provides for a MikroBus Expansion Socket. This socket has two 8-pin female headers
consisting of 3 groups of communication, 2 power groups, and 6 additional pins including PWM,
Interrupt, Analog input, reset, and chip select. There are a large number of compatible MikroBUS add-
on boards available in the market today that allow the end user to add functionality to development
boards. The MikroBUS module is optional and not included.
2.13
I2C
The SoM-112ES is equipped with two I2C hardware ports. One is routed to the MikroBus Expansion
Socket (SOK2) and the other is located on the Utility GPIO Header (HDR1). A TI TXS0102D voltage
translator is utilized on the I2C interface allowing a 5V or 3.3V selection via JB6 jumper.
2.14
SPI
The SoM-112ES comes equipped with two Serial Peripheral Interface buses. One is routed to the
MikroBus Expansion Socket (SOK2) and the other is located on the Utility GPIO Header (HDR1). A TI
TXB0106 Voltage Translator is utilized on the SPI interface allowing a 5V or 3.3V selection via JB5.
2.15
Status LEDs and Reset
The SoM-112ES provides a Reset Button located at PB1. Pressing this button will cause the system to
reset. A green status LED is also provided and is located at LD1.
