: Connected to GP24 . This is an active-low button that can be used for user input during runtime, separate from the Boot button.
The YD-RP2040 schematic follows the core reference design provided by Raspberry Pi but introduces specific modifications to the peripheral circuitry. Below are the primary sections you will find in its circuit diagram:
: Unlike the standard Pico, which uses a buck-boost converter, many YD-RP2040 schematics utilize a low-dropout (LDO) regulator to convert the 5V USB/VBUS input to the 3.3V required by the MCU. ydrp2040 schematic
When reviewing the YD-RP2040 schematic, pay close attention to the pins that differ from the official Pico layout:
: It typically includes 4MB or 16MB of QSPI Flash (often the W25Q series), significantly more than the standard Pico’s 2MB. Key Pinout and Peripheral Map : Connected to GP24
: Usually hardwired to the 3.3V rail or connected to GP25 (the same as the standard Pico onboard LED). Schematic Advantages for DIY Projects
: The heart of the board, featuring the Dual-core Arm Cortex-M0+ processor. The schematic shows connections for the 12MHz crystal oscillator and the necessary decoupling capacitors for power stability. Below are the primary sections you will find
: The schematic replaces the Micro-USB port with a USB-C connector. This involves specific CC1/CC2 pull-down resistors to ensure proper power delivery negotiation with modern USB-C hosts.