Education / Gpio Header J54 (Exp2); Figure 13 J54 Education / Gpio Header; Table 3.8-8 Education Connector Expansion Header J54 Pin Out - Intrinsyc Lantronix Open-Q 820 User Manual

3.8.10 Education / GPIO header J54 (EXP2)

Education/ GPIO header expansion J54 is a 20 pin connector that provides access to BLSP1 signals with
level shifters. It is ideally used for connecting external peripherals such as microcontrollers and any other
devices that are based on I2C, SPI, UART, UIM and GPIO. Please refer to the SOM schematic for the level
shifter, target voltage and current rating depending on stuffing option. The education expander also supports
multiple voltage ratings. The table below outlines the configurations for these settings:
Voltage Rails
MB_VREG_3P3 – 3.3 V
VREG_S4A_1P8 – 1.8V
MB_VREG_5P0 – 5.0 V
The following are the detailed pin out information for education header J54.

Table 3.8-8 Education Connector Expansion Header J54 Pin out

Description
NC
BLSP1_3_3P3(3.3V)
Open-Q™ 820 Dev Kit User Guide

Figure 13 J54 Education / GPIO Header

Signal Pin
NO
NC J54[1]
BLSP1_SPI_MO J54[3]
SI (APQ-GPIO0)
Resistors to Populate (0 Ohm)
R150 (Default)
R149
R151
Description
VREG_S4A 1.8V voltage
regulator max 150mA
VDD_EXP2 (Default 3.3V
Power Supply) max 300mA
Open-Q™ 820 Development Kit
Signal Pin
NO
VREG_S4A_1P8 J54[2]
VDD_EXP2 J54[4]
31