User's Manual l MBa8Xx UM 0100 l © 2020, TQ-Systems GmbH
Page 18
3.7
USB hub
Four USB host interfaces are provided via the TUSB8041 USB hub. The hub has one upstream port and four downstream ports.
The upstream port is the USB 3.0 OTG port, consisting of the OTG2 signals as well as the SuperSpeed signals.
USB host 1 and 2 of the hub are used internally for the Mini PCIe (see also chapter 3.8.8) or LVDS / MIPI DSI (see also chapter
3.8.6.2) interfaces. The other two USB hosts 3 and 4 are externally accessible as USB 3.0 hosts, see also chapter 3.8.10.
Table 17 shows the power management configured on the MBa8Xx with pull-up/- or pull-down resistors. Alternatively, all
settings can be adjusted by assembly options.
TQMa8Xx
Mini PCIe
Slot (X24)
USB OTG2
TUSB8041
USB_Dx
USB_DN1
LVDS FFC
(X22)
USB_DN2
USB_DN3
USB 2.0
Stacked
USB
Type A
(X20)
USB 2.0
USB 2.0
USB 2.0 / 3.0
I2C
I2C1
Level-
Shifter
OTG2_VBUS
V_5V_USB
1
kΩ
1.87
kΩ
Switch
FPF2165R
V_5V_USB
V_VBUS_H3
PWRCTRL3
OVERCUR3#
USB_DN4
USB 2.0 / 3.0
Switch
FPF2165R
V_5V_USB
V_VBUS_H4
PWRCTRL4
OVERCUR4#
Switch
MIC2026
V_5V
V_USB_H2_VBUS
PWRCTRL3
OVERCUR3#
USB SS
USB SS
USB_SS
Figure 7:
Block diagram USB hub