Kanex DualRole USB3GBIT3X

DualRole USB 3.0 to 3 Port USB Hub with Gigabit Ethernet Port

This product is a power-leeching liar: hub reports as self-powered,
 * yet both hub and NIC are powered by host VBUS.
 * When auxiliary power supply is used, then downstream ports are
 * switched to sourcing from DC inlet jack J1.

Hardware has capability to detect power supply presence:
 * J1 has a switch pin, leading to U3 (VLI hub controller pin 47)
 * and to Q1 (pin 1. Q1 might be a transistor / logic gate.
 * pin 3 leads to host VBUS (5V), pin 2 leads to ground plane).
 * When DC barrel plug present, J1 switch is OPEN, pin voltage rises to 4.4V from Q1.
 * When NO plug present, J1 switch is CLOSED to ground/0V.

U8 might act as power switch, connect downstream receptacle
 * power pins to one of: upstream USB VBUS, or J1.

Board label
Board label silkscreen mark: "IA-HEB2-H100", "2012-11-19" (likely design date)
 * "1428" in seven segment style (likely circuitboard manufacture date 2014 week 28)
 * MAC address of specimen is 00:24:9b:11:24:e3,
 * which resembles USB serial number 0000249B1124E3.

IC and microchip package markings
U2: 8 pin Pm25LD512 CE1423 2HQQQCLG

U3: 76 pin, 19 per 4 side VLI VL812-Q7 1415 Ⓣ B2943T5200

U4: 8 pin Q17X G547E2

U5: 68 pin, 17 per 4 side ASIX AX88179 QF 1426  UA3 QM095-000

U6: 24 pin, 12 per 2 side E-CON 1421F EG24A027S

U7: 8 pin ATMLH408 66BH  Y 2X1027RO

U8: 10 pin 9717A V52408

Y1: 25.000

Q1: SOT-23 3 [013O ] 1  2

Linux usbfs devices
T: Bus=02 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#=  3 Spd=5000 MxCh= 4 D: Ver= 3.00 Cls=09(hub  ) Sub=00 Prot=03 MxPS= 9 #Cfgs=  1 P: Vendor=2109 ProdID=0812 Rev=90.14 S: Manufacturer=VLI Labs, Inc. S:  Product=USB 3.0 HUB C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr= 0mA I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub E: Ad=81(I) Atr=13(Int.) MxPS=   2 Ivl=16ms

T: Bus=02 Lev=02 Prnt=03 Port=03 Cnt=01 Dev#=  4 Spd=5000 MxCh= 0 D: Ver= 3.00 Cls=ff(vend.) Sub=ff Prot=00 MxPS= 9 #Cfgs=  1 P: Vendor=0b95 ProdID=1790 Rev= 1.00 S: Manufacturer=ASIX Elec. Corp. S: Product=AX88179 S: SerialNumber=0000249B1124E3 C:* #Ifs= 1 Cfg#= 1 Atr=a0 MxPwr=496mA I:* If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=00 Driver=ax88179_178a E: Ad=81(I) Atr=03(Int.) MxPS=   8 Ivl=128ms E: Ad=82(I) Atr=02(Bulk) MxPS=1024 Ivl=0ms E: Ad=03(O) Atr=02(Bulk) MxPS=1024 Ivl=0ms

T: Bus=01 Lev=01 Prnt=01 Port=01 Cnt=02 Dev#=  9 Spd=480  MxCh= 4 D: Ver= 2.00 Cls=09(hub  ) Sub=00 Prot=01 MxPS=64 #Cfgs=  1 P: Vendor=2109 ProdID=2811 Rev=90.10 S: Product=USB 2.0 HUB C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=100mA I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub E: Ad=81(I) Atr=03(Int.) MxPS=   1 Ivl=256ms