Maker pi pico

[NegativCut]

Can this Maker Pi Pico Rev 1.2.
Can I use the built-in SPI1 SDCard reader and USB Serial 0 communication at the same time?
They seem to share the same pins at runtime. GPIO0 is shared with GPIO12 function TX0.
Appreciate if there is a workaround.
I know I can use UART 1 but that does not use the USB UART0.
Do I need to wire an external SDCard reader to SPI0?
Thanks

[CytronTrainee]

Hi, Thank you for reaching out! On the Maker Pi Pico Rev1.2, USB Serial (UART0) and the built-in SPI1 SD card reader cannot be used simultaneously because GPIO12 (SPI1 MISO) is also used for UART0 TX. To work around this limitation, you can: 1. **Use UART1 instead of USB Serial (UART0)** – This frees up GPIO12 but requires an external USB-to-serial adapter. 2. **Use an external SD card reader on SPI0** – This allows you to keep using USB Serial without conflicts. 3. **Explore software alternatives** – Advanced users might consider using PIO for serial communication, though this requires additional coding. For more details, check out the [Maker Pi Pico product page](https://my.cytron.io/p-maker-pi-pico) or [this SD card interface guide](https://www.instructables.com/Raspberry-Pi-Pico-Micro-SD-Card-Interface/). Hope this helps! Let us know if you need further clarification. Best regards, Cytron Customer Support