ESP32 has 3 different SPI interfaces, for user available only 2 – HSPI and VSPI. For modules with SPI RAM (PSRAM) interface VSPI is not available as used by PSRAM chip.
Table below has native pinouts for HSPI and VSPI interfaces
| SPI Function | ESP32 Pin (HSPI) | ESP32 Pin (VSPI) |
|---|---|---|
| CLK (Clock) | GPIO14 | GPIO18 |
| MISO (Master In Slave Out) | GPIO12 | GPIO19 |
| MOSI (Master Out Slave In) | GPIO13 | GPIO23 |
| CS (Chip Select) | GPIO15 | GPIO5 |
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