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The NORA-W106 module can check if the CS0 signal is low. If it is low, then there is no card at the
MicroSD card slot and can set an interrupt to the pin to be notified for a card insertion event. If the
CS0 signal is high, then the card is inserted, and can proceed to initialize the SPI peripheral.
Table 4
describes the pins used on the MicroSD card slot.
NORA-W106 pad
C1
B1
C2
B3
Table 4: NORA-W106 to MicroSD connections
2.1.7
Qwiic
XPLR-HPG-1 board has a standard Qwiic connector (J22) for connecting external I2C devices of the
Qwiic ecosystem. The interface includes two 2.2 kΩ pull-up resistors referenced to 3.3 V on the SDA
and SCL signals. The signals are shown on each mikroBUS slot.
Figure 14: Qwiic connector
2.1.8
Buttons
XPLR-HPG-1 supports three buttons (RESET, BTN1, and BTN2). The schematic circuit of these
buttons is shown in
Figure
Figure 15: XPLR-HPG-1 buttons
Table 5
describes the connections to NORA-W106 and the functionality of each button.
UBX-23000692 - R01
C1-Public
ESP32-S3 GPIO
FSPIQ / GPIO37
FSPICLK / GPIO36
FSPID / GPIO35
FSPICS0 / GPIO34
15. The buttons are accessible from the front side of the PCB.
Hardware description
XPLR-HPG-1 - User guide
Function
SPI-CIPO
SPI-CLK
SPI-COPI
SPI-CS0 / CARD DETECT
Page 20 of 37
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