ESP32-P4: How to connect the FLASH pins to an external flash
First, you need to connect VDD_FLASHIO and VDDO_FLASH correctly - see our blogpost: ESP32-P4: How to connect VDD_FLASHIO & VDDO_FLASH
Table 3: Mapping of chip and package to Quad SPI Flash pins
| ESP32-P4 | External Package Flash (Quad SPI) |
|---|---|
| FLASH_CK | CLK |
| FLASH_CS | CS# |
| FLASH_D | DI |
| FLASH_Q | DO |
| FLASH_WP | WP# |
| FLASH_HOLD | HOLD# |
Source: ESP32-P4 Hardware design guidelines - table 3 shows the pinout
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