Education / Gpio Header J54 (Exp2) - Intrinsyc Open-Q 820 User Manual

Open-Q™ 820 (APQ8096) / 820Pro (APQ8096SG) µSOM Development Kit User Guide Version 1.4

3.8.9 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 µSOM carrier board 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 3.8-4 Education Connector Expansion Header J54 Pin Out
Description
NC
BLSP1_3_3P3(3.3V)
BLSP1_2_3P3(3.3V)
Figure 12 J54 Education / GPIO header
Signal Pin NO
NC J54[1]
BLSP1_SPI_ J54[3]
MOSI (APQ-
GPIO0)
BLSP1_SPI_ J54[5]
MISO (APQ-
GPIO1)
Copyright Intrinsyc Technologies Corporation
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
NC
28
Signal Pin NO
VREG_S4A_1P8 J54[2]
VDD_EXP2 J54[4]
N/C J54[6]