Power supply: 100V-240V AC with C13 plug, internal PSU provides power for PoE and switch functions. Low voltage power is managed by an internal TPS23754 802.3at PD controller.
Board configuration
SoC
gpio 0: reset button
gpio 1: /INT of PCA9555 @ 25, falling edge/active low
gpio 2: I2C-0 SCL (bit banged)
gpio 3: I2C-0 SDA (bit banged)
gpio 12: I2C-1 SCL (bit banged). Defined in OEM, but not used.
gpio 13: I2C-1 SDA (bit banged). Defined in OEM, but not used.
I2C-0: 5 devices reported by i2cdetect
PoE MCU @ 0x20 (U49)
PCA9555A @ 0x22 (U11)
/INT: cascaded into U469:P1_7 (gpio 15 on PCA9555A @ 25)
gpio 0: port 2 amber PoE status LED
gpio 1: port 1 amber PoE status LED
gpio 2: port 4 amber PoE status LED
gpio 3: port 3 amber PoE status LED
gpio 4: port 6 amber PoE status LED
gpio 5: port 5 amber PoE status LED
gpio 6: port 8 amber PoE status LED
gpio 7: port 7 amber PoE status LED
PCA9555A @ 0x25 (U469)
/INT: cascaded into SoC gpio 1
gpio 8: white LED, active high
gpio 9: blue LED, active high
gpio 10: PoE output enable, active high
gpio 15: /INT of PCA9555A @ 22, active low (interrupt on falling edge)
NCT375 (LM75A compatible) @ 0x48 (U152): SoC temperature
NCT375 (LM75A compatible) @ 0x49 (U153): phy temperature