u-blox XPLR-HPG-1, Руководство пользователя

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XPLR-HPG-1 - User guide
UBX-23000692 - R01 Hardware description Page 19 of 37
C1-Public
mikroBUS 1 mikroBUS 2 mikroBUS 3
mikroBUS pin NORA-
W106
ESP32-S3
GPIO NORA-
W106 ESP32-S3
GPIO NORA-
W106 ESP32-S3
GPIO
13 - RX J9 GPIO3 (A) E3 SPICLK_N / GPIO48 - -
14 - TX H7 GPIO46 D3 FSPIHD / GPIO33 - -
15 - INT D8 GPIO4 (A) J2 JTAG_TCK / GPIO39 H2 JTAG_TMS / GPIO42
16 - PWM E9 GPIO7 (A) H3 FSPII04 / GPIO10 (A) G1 MTDO / GPIO40
Table 3: mikroBUS pins to NORA-W106
☞
Due to restrictions of available UART ports on ESP32-S3, RX and TX on mikroBUS 3 are not
connected.
2.1.6 MicroSD
The C213 baseboard supports a MicroSD card slot that is connected to the SPI bus exposed on the
mikroBUS slots. The microSD card can be accessed through single SPI. A circuit that multiplexes the
card chip select pin with the card detect pin is also supported. The circuit employs an open-drain NOT
gate that supports the following functionality:
• When the MicroSD card is not inserted, the card detect signal (CD) is high and the SPI chip select
(
microSD_CS ) is pulled low by the NOT gate.
• When the MicroSD card is inserted, card detect signal (CD) is low and uSD_CS is left floating by
the NOT gate and can function normally as a CS signal.
Figure 13 shows the circuit diagram of the MicroSD card slot and card detect circuit.
Figure 13: MicroSD card slot and card detect circuit