Download the official Y6P datasheet and cross-reference your schematic against the recommended application circuit.

| Pin | Function | Typical Connection | |-----|----------|--------------------| | VIN | Main DC input | 5V USB or 3.7V Li-ion | | VOUT | Regulated output (3.3V) | 10µF + 0.1µF decoupling | | VBAT | Backup battery | 3V coin cell + diode | | GND | Ground | Star ground plane |

[DC Input] → [Voltage Regulator (3.3V/1.8V)] → [Y6P VDD] ↓ [Battery/Backup] → [Power MUX] → [Y6P VBAT] ↓ [I2C/SPI Host] ↔ [Y6P Logic Core] ↔ [GPIO Bank] ↓ [External ADC] ← [Analog Front End] ← [Sensor Inputs] ↓ [LED/Interrupt] ← [Control Logic] A. Power Supply Network The Y6P supports 2.7V–5.5V input, with internal LDO for core logic.